Forget the Duramax! This New Chevy Silverado HD Gasser SURPRISES on the Denver 100 MPG Loop!

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( www.allTFL.com ) Check out our new spot to find ALL our TFLstudios content, from news to videos and our podcasts! In this video, Andre tests out the fuel economy of the 2023 Chevrolet Silverado 2500HD with the 6.6-liter gas V8 on the Denver 100 MPG loop!
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#chevy #silveradohd #mpgloop

[@TFLtruck]

TFL runs on Sinclair fuel and so should you. Download the Sinclair DINOPAY app and start saving as much as $0.10 or more per gallon on your next fill-up. ( www.sinclairoil.com/customers )

[@Formulabruce]

You folks don't keep Diesels long enough ( and run them loaded) to realize the maintenance cost of the Emissions part of of the Duramax, or any diesel. just an observation. Great Video, again !

[@keithchrysler3732]

There's not a Sinclair station within 1,000 miles of us.

[@dandufoe4594]

I agree especially with a 9500 engine option, then add the cost of def, the oil changes are twice as much then fuel filters, the price of injectors alone I have 2 diesels and everything is twice as much and I’m over it😂😂 but I still love my older diesels especially my 6 speed cummins

[@chadbailey189]

save your money, don't pay stupid price of new stuff!! I'll keep my 03 chevy with no outrageous price

[@Icutmetal]

@@chadbailey189No.

[@michaelsaucier5633]

2.5 mpg better is not enough better to justify a diesel in my opinion. The added cost of diesel fuel, oil changes that are triple, fuel filter maintenance, DPF filter cost, issues and maintenance. Way easier to just spend less for a little more fuel imo. Great videos!

[@unitedgray]

With all things being equal (gas vs. $9500 diesel option) and at today's fuel prices you might break even at around 200,000 miles of towing. Considering that very few vehicles will tow 100% of the time, the break even point is probably closer to the 250,000 mile mark. It's really not a sound financial decision to opt for the diesel anymore unless you tow 15,000 lbs or more on a daily basis.

[@kevin9c1]

@@unitedgray And you didn't even add in what is almost certainly more maintenance/repairs on the diesel to reach 200k.

[@mattie3595]

‘Sound decision’ is an opinion. I would argue that a diesel truck from all makes has better trade-in/resale than pretty much any vehicle on the road. Wildly different resale value of a 100,000 mile diesel vs a 100,000 mile gas truck. Over time diesel still better value regardless of the $9500 up front. Far better value than any sports/luxury/SUV of the same purchase price.

[@kevin9c1]

@@mattie3595 Resale is a good point that I had not considered.

[@unitedgray]

@@mattie3595The resale is higher because the initial purchase price was higher. Realistically as government mandates on diesels continue to become more strict, that resale argument will become a moot point. We're already seeing far less reliability than the diesels of the past, while also seeing a dramatic increase in the longevity of equivalent gas motors.

[@Jassman3536]

I have had diesels since 1996 from all 3 manufactures. I switched to a 2020 gas F250 7.3. I still tow the same bobcats and boats that are 13-17k pounds. There are always compromises but the mileage is not that much worse and gas is less money than diesel. Where I really make out is repairs and maintenance. I am shocked at the 19mpg on the GM gasses and when the time comes I will drive all 3 and choose at that point. Andre, thanks for the review.

[@TFLtruck]

Thank you for watching! -Andre.

[@Killbot754]

Me too, the 19mpg is half ton territory. My 16’ 5.3 Silverado 1500 got 19 highway. Switched to the 7.3 f350 this year for towing big trailers and I’m now around 15-16 unloaded and closer to 8 with a trailer. But gas is still way cheaper!

[@phantom0456]

I’m generally partial to GM, but that 7.3 Godzilla is a beast. However, 19mpg unladen from GM’s 6.6 gasser is very impressive for a damn near 4 ton truck.

[@bobover2267]

Mileage ALWAYS depends on terrain. I've owned 5 GM HD gassers since '07, including a new 2024 6.6 w/Allison and I've done multiple performance upgrades, have tried every tire size from 16"-20" tires and can tell you about what mileage improvements you'll get by doing different things. 19 mpg is RARE, and you'd have to drive the truck 65-70 mph to even come close to that here in Montana. 15 mpg+ is easily obtainable while empty, but 7-10 mpg towing a 10K trailer is about normal. If I'm traveling out of state on the freeway, dropping in elevation and cruising 75, 15-17mpg is also obtainable. These gassers will never compare to a diesel in pulling/towing power, but they'll get fairly close on mpg & will save you thousands in operating/maintenance costs, as well as $10k on the sticker from the get-go. I love my '24 High Country HD Crew 4x4 gasser, and after logging over 350,000 miles with only around $700 in repair/maintenance costs on 5 different trucks, I'll NEVER own a diesel. I do tow a 10k lb job trailer on a regular basis with my trucks, so I do work them a bit. Here in Montana though, these gassers only average around 12-13 with the terrain and city to freeway driving. I also observed that with every 1" increase in tire/wheel size, you'll lose about 1-1.5 mpg.

[@Jassman3536]

My 2020 has a Carli 3" level with 37 12.5 20's on a 9" wheel w I believe a zero offset. I ordered the wheel arch moldings from the tremor, the steps and front valance and looks like a Tremor on steroids. My mileage traveling every day without a trailer from job to job, mostly in the city, is about 12.5. On the freeway Im doing around 80 which also doesn't help. I did add a 5 star tune on 87 octane and it adjusts the speedo which i verified. I lost about 3 mpg when I did the mods. If I go 74 and have it on economy I get 15.2-15.8 going to my last job which is 80 miles both ways. I was offered 55k today as a trade in for it as I went to the dealer for an oil change. Tough decision @@bobover2267

[@colbiecolbie6979]

Best thing! No cylinder deactivation

[@Thefloorsspeakyiddish]

I’m not even looking at 1500s for this exact reason, even though a 3/4 ton is way overkill for me

[@Erick-di9gm]

Went gas starting 2017 in my f250s, couldn't be happier. You don't realise how many little things you're always worried about with the diesel. No more extreme cold weather worries for starters.

[@TheHouseofTitan]

Switching from a modern diesel to a gasser eliminated all the stress on my long overland trips. Being stranded in the middle of the countryside is scary. No more check engine light anxiety :).

[@DirtE30]

Just to be clear, the 6.6l gas is NOT an OHC engine, it’s a cam in block, OHV engine. I know that’s what Andre meant.

[@Dankcatvacs]

@evilhenchmen9594 ohc like one of them hondas my lawn mower got that gcv honda darn good engines .

[@JeepCherokeeful]

I doubt it

[@christopherwest5840]

I was surprised to hear that come out of his mouth. He doesn't really know what he's talking about with GM engine design.

[@jbjlock26]

I’m sure Andre knows what he’s talking about; he simply mis-spoke…meaning to say overhead valve!

[@joeganusi8522]

I like how he said "it's a pushrod cam design, overhead cam" LMAO he has no clue what he's talking about.

[@BrokeGuyBBQ]

As a 15 year diesel mechanic. For my money, what I tow, and seeing the repair bills on diesel pickups I'll stay with my gas HD truck. Will just have to see how the 10 speed gets along after some miles and real world use.

[@cragre28]

The Bandit should be the engine name, because the Transam driven by Burt Reynolds was a 6.6 V8.

[@Icutmetal]

🤦‍♂️

[@jasonbalthrop6633]

Why not just call it a 404??

[@DixieNormous1]

I've had diesels for years, but after the DPF plugged up on my 2019 powerstroke ,my next truck will probably be a GMC gas. I pull a trailer with my bobcat once a week, but most of the time it's just a service bed with tools. My dad had five brand new trucks. They were all gasers,i still have his last one after he passed

[@barry7920]

It's a good point - if you're towing heavy for 20k miles annually, you'll feel the mpg differential a lot more than if you're towing heavy for just 5k miles per year.

[@mfgxl]

If you are pulling a trailer with your bobcat, what mpg does the bobcat get?

[@nelsonsantos2631]

@@mfgxl😂😂😂😂😂

[@czwarlord9243]

Yup. A lot of hidden costs with a diesel people don’t know about. If you don’t need a diesel don’t get them. (My daily is a Cummins fyi)

[@dalelangehennig161]

@@mfgxl 🤣😂🤣

[@PolarBear00777]

My 2021 2500HD 6.6L8T with the 6spd does amazing for fuel economy both empty and loaded here in Quebec, where most of the highways are far from flat! I normally average 12l/100km or 19.6mpg when empty and around 23l/100km or 10.2 mpg pulling my 9000lbs 5th wheel, speeds are between 100km/h to 115km/h or between 62mph and 70mph. Overall I am extremely pleased with my 6spd! I road tested the 10spd and found the torque management to really be holding the truck back!

[@TFLtruck]

Thank you for the feedback.

[@brucecollins8865]

Similar with my ‘22L8T truck. I average 17mpg on two lanes at 60mph (mostly short trips of 18 miles to work), I’ve done as well as 17.8 on a trip to Arkansas and back at freeway speed for long hauls. I find no fault with the 6 speed either, definitely not Enough to trade for a 10speed

[@samuelsanchez-uj6ui]

How it have a 6.6 gas with the 6pd only getting 12.3 in the highway unloaded I usually drive 80 mph

[@brucecollins8865]

@@samuelsanchez-uj6ui it’s likely the 80mph that’s hurting you. Also how hard you accelerate. I drive pretty easy, there is little traffic, and keep speeds down. Makes a huge difference.

[@bloodbushcraft2467]

In my 2021 2500 I get around 16.5 when I either take it easy going 55-60 or when I do long trips. But I've had an over size tall topper on it.

[@oicu81b42eh]

was in market for a tow rig to pull 24ft enclosed trailer converted to toy hauler weighing 8500-9500 lbs. joined all 3 manufacturers numerous facebook pages and forums. after a month I decided to look at gassers. So glad I did! Diesel groups are all about limp mode, fuel pump, injectors, def heaters ect on and on. the gasser pages were all about what wheels, running boards, lifts ect. only pulling some weekend trips, it was a no brainer

[@jimmiegill3981]

I used to own a 8.1 Chevy and got 5 towing my fifth wheel and never got over 10 empty even on the highway due to the Allison which I loved they have come a long way

[@rjg967]

Not sure how, my 2001 8.1 gets 13 empty, even with 16K on a gooseneck I got 8mpg (in a mountainous region of Southern California) My truck has 386K miles currently on the original engine and transmission.

[@adambartle7826]

Yes the diesel tows better. Yes it gets a little better mpg. But! It also has def, it also has dpf, if your fuel system fails you are looking at around 10,000 dollars to replace it. Not to mention turbo issues. I don’t tow very often but like the size and payload of a hd truck. I recently bought a 2024 gmc 2500 and couldn’t be happier. Just my take. 👍🏻

[@freetoroam7769]

I am very pleased with my 2017 gas dually with the old 6.0. Hauls my camper nicely, and no diesel issues.

[@kellyheath8547]

I think the 6.0 was a solid motor, guys just didn't like having to spin up to 4k or 5k to get the power. My suggestion to those people, cover up the tach and wear ear plugs. The motor works.

[@hoosierdude7102]

@@kellyheath8547The racers and off-roaders sure like the 6.0!

[@kellyheath8547]

@hoosierdude7102 the 5.3 is enough for me, I just want aluminum.

[@garydoebler1263]

I have a 2002 2500hd crew cab long bed 4x4 6.0 gas with almost 300K on it. We pulled our 11,000 pound fifth wheel from southeast Arizona to northwest Arizona through the mountains on I-17. Did amazing on the flatter parts but on the 7% grades it bogged down to first gear. In first i only let it rev to 4000. That setup got 8mpg. Not bad for older technology. I was satisfied.

[@kellyheath8547]

@garydoebler1263 and for the price you can buy that truck now, it's a solid tow rig/hauling rig.

[@TallCoolOne51]

I purchased a new 2024 2500 HD LT, 6.6L gas about 2 weeks ago. Nicely optioned, just under $62k. To be used on occasion to tow a 7k GTW utility trailer. Watched this video with keen interest. So far the gas engine has been more than adequately powerful, and the Allison 10 speed AT impresses me,

[@MrC9Oh3]

What's the payment on that bad boy?

[@TallCoolOne51]

@@MrC9Oh3 A lot less than the payments would be with the optional $10k diesel

[@MrC9Oh3]

@TallCoolOne51 well I never would've guessed that..

[@tscherry70]

I just bought the same truck as you did. I'll be towing trailers and mid-sized RV's. I think for my use the 6.6L gas will work fine. I came from a 2013 F-250 6.7 powerstroke that blew up at 102k miles and left me stranded for hours. I'm done with diesel, until there comes a time when we can have a diesel without EPA mandated emission systems.

[@MrC9Oh3]

@tscherry70 that time will never come. They have snuffed out diesels, they are currently working on snuffing out gas engines.

[@mikepieczynski8870]

As a career mechanic my opinion is that the lower fuel economy of the gas engines far outweighs the mainteance costs of a diesel. Just installed a FCIM on a Duramax yesterday, $2000 box of relays to control the fuel injectors, and they fail often. Add in the cost of exhaust after treatment and it's just not worth it.

[@TFLtruck]

Thank you for the input!

[@tyflesh]

@@Pantelifts10 these are all opinions. And if your working your truck and it's a money maker, most of the comments agree the diesel might be a better was to go.. Mike is just telling you what he see's as a mechanic day in and day out.. His opinion definitely counts..

[@jasonlarsen3515]

@@Pantelifts10do the math yourself.

[@jamesw.6204]

What exhaust treatment are you talking about.

[@epstiendidntkillhimself20231]

​@@jamesw.6204the exhaust gets packed full of soot when the injectors act up, so it needs to be cleaned out to run properly.

[@jamesengland7260]

I have a 2024 and I haven't gotten over 14 yet. And that is trying to baby it and get good numbers

[@scottyellis3442]

This is how you start your day off great, with TFL & Andrea testing HD trucks. In my opinion I believe gaser is the way to go because the much higher upfront cost of a diesel over gas & then much higher maintenance on the diesel, and the diesel is only getting 2 & 1/2 mpg better??

[@trullmann]

To go in line with this video, when you break down current gas and diesel prices in my area plus the cost of BlueDEF with your mileage results. The gas is right about 41.5c per mile while the diesel was right about 39.1c per mile of operational costs for the fuel. About 5.4c per mile difference. So just "fuel and BlueDEF" alone, you would need to drive around 395,000 mi to break even for the cost difference of the diesel setup. And keep in mind that's pulling 100% of the time.

[@barrychouinard4019]

My work just picked up the plain Jane version of this truck, including standard cab. Biggest accessory was setup for snow plow, sticker is $53.5. Will be headed to NE as a shop truck.

[@Kenneth_R]

No def, no worries about diesel fuel quality / additives, no $$$ after-treatment systems, cold starts etc etc etc. I will take it. Unless you tow a lot the gasser is he way to go.

[@judee00]

I have a 2022 silverado HD with the 6.6l V8 and 6 speed transmission. Towed a 16' dump trailer that weighed 13,000 loaded. Hardly felt it on the hitch. Truck towed it great! Fuel milage was about 12mpg on 3 trips to the scrap yard.

[@dodianderson932]

I like the new trucks, but not enough to sell my '06 3500 LBZ crew cab single rear wheel that I bought new. The Duramax has been almost maintenance free, the only thing replaced in its 240k miles were the glow plugs at about 98k, and they were covered by warranty. I ran hot shot the first 2 years and put on over 100k in that time frame. The original brakes went 200K!! Now I mostly use it to tow my boat that weighs 10000lbs, and it gets 12mpg doing so. Steady 60+mph it gets over 20mpg, and 75mph on the freeway it does about 18mpg, hell it still has the original serpentine belt! I check it every few months and still no cracks! Best vehicle I've ever owned. Did I mention all original front end parts, and they're still tight!

[@jamesbecker3420]

The real question is, would you buy a "new" diesel or a HD gasser? Everyone knows the older diesel engines are much better than current ones...

[@TheFarmersLife]

This might have sold me on a GM. Been thinking of going gas with my next truck because today actually was the first time I’ve pulled our gooseneck in a couple years and put the Cummins to work. Built a 2500 ZR2 online last night. First time I’ve seen the builder online for them. Several thousand less than an AT4X 2500!

[@dylanluhowy]

There’s a guy on Facebook who has 272,000 miles on his L8T. He runs hotshot.

[@jasonscales2522]

I'm about to make a channel hotshoting with the L8T I just picked up a few days ago.

[@Kev023-h3k]

​@jasonscales2522 if you run a long trailer like 40ft you are gonna learn the hard way that truck stops don't sell gasoline on the semi truck side of the truck stop. Diesel is the only way to go in hotshot with trailers over 30ft or so imo. Good luck finding out the hard way.

[@jasonscales2522]

@KevinSwain-h3k Well I hav been doing it for a 2 months now and only gas up at pilot/flying j because they give 5 cents off. If RV'ers can pull into gas stations with their 35ft RV's then it'll be a piece of cake for me being a cdl driver.

[@jasonscales2522]

@@dylanluhowy do you happen to know the guy's name? I'd like to connect with him as I just started hotshot with mine

[@kevinperry581]

Diesel does not make sense. Gas is way cheaper than diesel and still costs less per mile even when towing. Maintenance is way higher on a diesel. And before you people say “resell” , resell doesn’t matter because you spend way more in the beginning and if you keep a truck a long time, whatever you sell it for doesn’t even matter. I don’t sell them anyway, I just add another.

[@paulbenderavich3833]

5yrs minimal ownership for optimal resale value on diesel.

[@Steven91992]

Diesel still has a place but as time goes on it is making less sense to own one especially if you don't tow extremely heavy loads. Gas engines in the heavy duty trucks have come a long way and they're getting better and better every year that goes by.

[@clayornelas7537]

You can buy a lot of gas with the price on the diesel option and also not having to deal with the emissions BS so this gas alternative would be my choice. Putting a 10 speed sure helped it alot too

[@hworkmaniv88]

Average cost of regular fuel right now could buy ya almost 3,500 gallons of fuel for the added cost of a diesel! lol couldn't agree more the diesel is for people towing 10,000# regularly and that's about it.

[@andrewb981]

Given this result. If you are driving the truck daily for short distances, and need towing capacity for weekend warrior stuff (camping or boating with a heavy unit ) this may be a better option over the duramax. Diesels don’t like to be run daily for short distances, those engines need to get hot to be most efficient.

[@philipg7982]

100% - my 24 Silverado 2500 is this exact use case. It's not for everyone, but I am VERY pleased thus far.

[@a.m1285]

@@philipg7982you have the gas engine with Alison tranny? What is your gas mileage?

[@petenelson8136]

I've got a 2017 F350 DRW Diesel, and would love to get a gasser now that they've got this new option. I just can't justify a trade in because it's all paid for. Next truck will be a gasser. I only use the truck occasionally when I'm pulling my 40' 5th wheel, pulling my 14' dump trailer, or picking up supplies for the farm. I bought a 2019 Toyota Camry Hybrid that's getting 52+ mpg (best I've seen is 57.7 mpg on my 200+ mile trip to IL last week) on a regular basis without babying it to try and get good mileage. My other vehicle is a 2012 Prius that I bought new and now has 282k + miles on it and getting 46+ mpg (used to get 50+) still on the original batteries. I'm all about cost per mile when it comes to vehicles.

[@thecat6062]

I would like to see a total cost of ownership comparison for the" Average person" . I believe that if you had two identical trucks, one diesel and one gas doing the same job over the same time you would find the gas truck would be more cost effective. Price of truck, fuel, maintenance, etc . Thats for the average consumer not someone like a hot shot owner or commercial hauler. Love the videos!

[@jetdriver]

I’ve spoken with commercial fleet operators who run large fleets of HD trucks. This is your ideal use case for a diesel because lots of miles under load. And they tell me that the diesel engine trucks cost more to buy, own and operate and don’t make it up on resale. If total cost matters buy gas every time.

[@andyharman3022]

I think gas engines are now cost-effective for hot-shotters. I used to run trailers and talked to a few guys that ran gassers. One that I talked to had a GM 6.0L that had 360,000 miles on it and stuck a rod through the side of the block. He was down for a week and the engine replacement cost him $2000. Around the same time I heard this story, my '08 Ram diesel went down for EGR system problems. It cost me a week of downtime and $2200 in repairs.

[@GeorgeOrwell-tp8dw]

Only thing not talked about is resale. 10K less to buy, 15K less on trade, they just don’t hold value as well

[@andyharman3022]

@@GeorgeOrwell-tp8dw The $5000 difference is small compared to the $70,000 purchase price.

[@Icutmetal]

I can tell you that over the last 143,000 miles on my 2018 2500HD Duramax, I’ve spent $17,000-$18,000 on maintenance (both scheduled maintenance & unexpected repairs) and have averaged a very solid 18mpg. I have averaged 30,000-35,000 miles per year (mainly highway, but plenty of stop & go) for the last three years and sparingly before that. Minimal towing, sorry to say…but of course it excels at that. The juice is not worth the squeeze anymore for diesel with as good as these gas engines are getting. You have to want or need a diesel…and I wanted one more than I needed one. Can’t beat the pulling power, but I don’t think a lot of people are honest with themselves about that need vs. want. At this point, it’s a gasser next time around for me.

[@Icutmetal]

I just had to have a FICM done in my 2018 at 142k. I use my truck as a daily driver and it broke down in a customer’s parking lot. I have a code scanner and suspected the FICM, but wasn’t in a position to work on it myself so I had it towed to a dealer for repair. I have kept track of every maintenance item since I drove my truck off the lot new and I’m up to about 16k now. Not all of that has been unexpected, however. It’s nearly stranded me twice. No issues with the emissions system yet other than an air intake temp sensor at around 40k. I have done the math multiple times and figure I could break even on fuel cost alone as long as I could get 13-14mpg on a gasser. I don’t think there’s nearly the advantage to owning diesels anymore, aside from pure pulling power. I got the diesel thing out of my system…will probably go gas next time. I knew the 7.3 gas was coming out when I bought my 2018, but didn’t want to wait. Didn’t see this 6.6 coming. It’s sort of sickening to see that to replace my 2500HD SLT All Terrain HD Duramax, I’d have to spend about $15k over what I paid. Even basic HD gassers are about the price I paid…ugh.

[@MegaGeorge1948]

The $9,500.00 (Diesel option) can buy a lot of gas over the lifetime of the 6.6L gasser. Also Diesels require more expensive maintenance compared to gasoline powered engines too.

[@WanderingOutsideGuy]

Don't forget to add the extra oil you will need to buy as well

[@MegaGeorge1948]

@@WanderingOutsideGuy I was going to mention that. When I owned a small 2 Liter four cylinder Diesel, it took 6 quarts and I had to change the oil every 3,000 miles. The most suitable use for a road Diesel is for the class 8 trucks that haul 40 tons of freight.

[@MolsonM3]

@@WanderingOutsideGuythe 6.6 gas is 8 quarts, 6.6 duramax is 10 quarts. Not that big of a difference

[@Icutmetal]

@@MolsonM3You’re right, not a lot, but it does all add up.

[@husnan0221]

I am shocked, devastated, happy, and more. I have a 19 tundra TRD sport double cab and I loved the reliability. Now that I have to start moving weight I’m really sad with how poor the gas mileage is on 285/65/18 (5.5L per KM) I can get almost same MPG while hauling 5tons and almost 1 ton more in curb weight with almost a litre more in displacement (5.7) I am in love with the 6.6 L8T and can’t wait to see you test this motor with the whipple like you guys did with the super Godzilla (BTW how about Turbo Jet for name to pay homage to the stout T400 transmission of the old days)

[@jasonperry7970]

Great! May I recommend another towing content idea? I76 from E470 to I80. This is a harder pull than you think. It is not flat, there are lots of long grueling hills, crosswinds, and truckers passing you at 80+ throwing your rig around. Please do an I76 run, MANY people from the Denver metro pull campers and boats to Lake McConaughey Nebraska area. Its a challenge with a 5th wheel or broad side bumper pull camper.

[@joelseela6635]

Agree. After 4000 mi trip with my 5th wheel, going back to a diesel. Also diesels have engine brake, very valuable for heavy loads and steep grades. Another issue, Truck islands don't have gas, and with a 13' high trailer, most gas islands don't play well.

[@jbjlock26]

@@joelseela6635Good point! I’m towing a small travel trailer with the 1500 Duramax. Did a 6,500 mile trip in 2022 and never had a problem getting fuel. Thinking about getting a small fifth wheel and a 2500. They simply don’t make convenience stores accessible to trailers. As for fuel cost, I use a contract price fuel card good at numerous brands of truck stops.

[@kcspeed9980]

One idea for improved fuel economy unladen is the active grill slats that are found on LT and higher trims, I believe but they could be on all trims as of 24. The 20-23 truck tested was a custom trim which definitely didn’t have them. I’m colder conditions the slats will close and greatly reduce air resistance. Just a thought, we just switched from a 6 speed to a 10 speed Chevy 2500 gas. It’s a great truck and the 10 speed really improved it. Our 23 was totaled and I would not go out of my way to trade in my 6 speed truck for a 10.

[@slaytanic921]

I’m in that position with my ‘22 that’s paid off. I don’t think I am going to go out of the way to trade in unless it’s a really hot deal. My truck is paid off.

[@TaigaTurf]

At this point, the main appeal of a diesel is the exhaust brake.. especially in very hilly terrain, it gives confidence without having to ride the disks all the way downhill.. Love big gasser pickups

[@mattdagger1480]

I’d love to see this same run and test on the f250 with the base engine 6.8l

[@truckguyjoe]

Where are all the L8T 6.6 gas is an oil burning piece of junk comments??? This engine does not get enough love… It definitely does the job! Since 2020 I have sold more 6.6 gas to commercial accounts compared to the Duramax… i’ve got customers with the 6.6 gas in their box trucks, dump trucks, stake bodies, pick ups, Service Body‘s, flatbeds… couple of transmission issues from abuse… But no catastrophic failures on the engines yet

[@freedomisntfree_44]

Nah they just overheat 😂

[@jbbassin5389]

My 2020 burns about 1/2 qt in 6000 miles. But it’s almost always pulling some sort or trailer every weekend. It’s also never overheated even pulling my 10k lb travel trailer in 115 degree heat in TX.

[@matthewanderson9912]

It’s the best gas engine on the market hands down. There’s no widespread failures of any kind for these engines. They have been out since 2020 and with social media what it is if there was widespread failures they would be known. Just look at the lifter problems in the DFM 5.3 and 6.2 1500 trucks, especially the 2021 model year. You can’t go on a Facebook specific truck group without reading about those. Same with the 7.3 from Ford. It debuted in 2020 also but it’s definitely had some widespread issues. This 6.6 has pretty much went off without a hitch. My 2022 6.6 L8T has been great so far. Just over 32,000 miles. It doesn’t burn any oil but I do change my oil at 3,000 miles.

[@truckguyjoe]

@@Pantelifts10 These are large fleets including oil & gas companies and paving companies… most of these trucks are single rear wheel, double cab & crew cab pickup or service body trucks, single rear wheel, not dually…the GCWR of the SRW 6.6 gas is not much less than the GCWR of the SRW 6.6 diesel, so in reality they’re not losing much towing capability… And they are gaining payload… The gas engines have a higher payload rating because they weigh less than the diesel. Also… The majority of the ambulance companies that we sell chassis to… Switched to the gas a long time ago… They were tired of all of the emissions components failing on these emergency vehicles. Keep in mind these large fleets, their trucks have extended idle times… it’s just part of their business and what they do… Idling on the side of the road. No clogged DPF with a gas in this situation!

[@mattwag11]

@@matthewanderson9912 If you're using mineral oil I can see 3000 but with any full synthetic that is a complete waste. Double it to 6000 with full syn.

[@TEC_Stuff]

I would really enjoy seeing tires checked and filled to the manufacturer suggested cold tire PSI levels before all future MPG Loop runs (Helps compare apples to apples). Also please mention ambient temperature and wind conditions. Finally, any settings engaged such as Tow/Haul mode. I know this sounds too detailed, but having these factors each time helps a potential purchaser understand Real World Scenarios. Thanks Andre, keep up the relevant tests.

[@donaldthomas5852]

I have 3 Chevy trucks two gas and a diesel. A 99 2500 6.0 gas and a 04 3500 8.1 gas and a 01 2500hd 6.6 Duramax lb7. All have been great trucks.

[@georgestrickland9278]

that truck would look so much better in red with the chrome front end

[@TheDuramax66]

Im a Diesel guy, and im a diesel mechanic, and i never thought id be saying this, but i think under 13k pounds. In this era of EPA emissions. Id have to recommend the gas truck. If deletes were still a think, which i know they are just getting harder and harder to do, id recommend a Diesel everytime. But when your buying a modern diesel you're buying a truck with an expiration date on it due to ghe DPF.

[@uwskier]

If you skip the power running boards, sunroof, HUD, and 20" rims, you're well under 70k for that truck, and if you daily drive it in addition to towing, the gasser is a no-brainer. In 2020, GM reprogrammed the diesels to regen more frequently because of cracking DPFs. This cut the MPG fairly considerably. It's why you got nearly the same MPG unloaded with both trucks.

[@99unclebob]

Andre great video , that is an improvement of 20.8% going from the 6 spd to the Allison 10 spd that is awesome and your at a mile above sea level, and towing results are good also, that truck has loads of roam to tow lots more with that powertrain, skip the diesel and stay with the gas, $ 10,000 buys you allot of gas for years and save a fortune of maintenance, GM diesels are not cheap to maintain, my nephew has both , a 2020 GMC 2500hd Duramax with the Allison and the 2021 GMC 1500 baby Duramax with the 10 spd and he loves both especially the baby Duramax it hauls easily and when unladen it sips diesel like wine, it gets stupid economy, even his dealer can't believe it until they recorded it off the trip computer, in the end he says the maintenance cost is really high, he has the ability to do it himself, just doesn't have the time, the dealer just did a major service on the 2020 Duramax and his bill was a fraction over $1600.00 ouch 👍

[@mattcanfield6384]

Been a mechanic for 25 years had them all emissions killed diesel reliability have a 23 hd 6.6 gas pulls 12 k every weekend zero issues gets 9-11 towing 14.5-17 empty

[@thordonner4095]

I have the 2024 gas 6.6L. The 10 speed is a game changer. I had a deposit on a 2023 diesel 3500 HD but an unscrupulous dealer sold it out from underneath me when it arrived and probably did me a favor. My friends love the Duramax, but hate the unreliability of the emissions system which has left them stranded literally for months when it breaks down and the dealer can’t get parts. One spent $10k just on emission repairs after the warranty expired. And I’m sure there are many who haven’t had problems yet. Good for you. I hope your luck continues. If you’re towing heavy loads long distances often, I’d probably go for the diesel and just deal with the additional cost and lack of reliability. Anything else, the gasser with the 10 speed is perfect and far less expense and hassle in my opinion.

[@christownsend7602]

Guess it comes down to drive what suits you. I have had big block gas engine trucks and absolutely love my F350 Powerstroke. I wouldn't trade it for anything other than another diesel. I bought it used, one year old, so I got it at a better price because of the depreciation, so that helped some on the initial purchase price. Have almost 80 thousand miles on it, and it's been a very dependable vehicle. Your money, buy what you want is what I think.

[@johnnyb.1807]

Andre: “Forget the Duramax!” Also Andre: “should probably get a Duramax”

[@aarongaal8168]

It’s not exactly apples to apples, but I have a 2020 F-250 with the 7.3 gasser and tow 14,300lbs daily with it - conventional towing, not gooseneck or fifth wheel, and it’s been decent. I do put a heavy plow on the front and plow commercial all winter with it, just replaced the front end in May 2024. It’s not great mileage towing or plowing but it’s decent enough to keep me away from a diesel truck

[@CHRISINMCNEILL]

I own a 2021 GMC elevation, Z 31 with a 3.0 Duramax. A sea level my MPG ranges in the mid to high 26s. I drove a 2023 Chevy 2WD crew cab LT as a loaner for about 6 weeks as my truck was down waiting on a coolant control valve. This Chevy mid 20 to low 21 mpg. At that time the difference between diesel and gas was about a dollar a gallon. I done the math and it would take nearly 100,000 miles to overcome the up charge of the 3.0 Duramax. The 6.6 Duromax is nearly a 10k up charge. If money was the deciding factor the gas motor will win hands down. I will have to say that I was glad to get my 3.0 truck back, it drives so nice.

[@michaelerickson3626]

Andre, great information! That is my next buy! I am getting the 2500 HD LTZ with the 6.6 and Allison 10 speed trans…cannot wait to own and enjoy!

[@markbunn8576]

That's really good fuel economy for a 7k pound truck. My little S-10 with a 4.3 only gets 20mpg.

[@guardrail2897]

We sold ou ton 2017 Cummins and bought and bought a 2021 ton Hemi. Towing the same trailers and weight, it gets 1.5 miles per gallon less than the Cummins but gas is about 90 cents cheaper than diesel. The Hemi does just fine. Plus, no worries about the def system breaking.

[@Dan-vh8yh]

With more gears in transmissions, gassers are mimicking diesels and staying in peak torque range most of the time. Diesels are still more powerful, but for personal use, occasionally towing a trailer or hauling cargo to job sites the gasser is plenty capable. Even plowing snow, most people don’t keep a truck long enough to get ROI on the extra cost of the diesel and the added maintenance. If you tow heavy daily, keep your trucks for a long time the diesel may be the the better choice.

[@fireman1780]

Diesel vrs gas torque and HP are two totally different things. There not the same

[@LX450_Adventure]

5:55 Andre misspoke. It is NOT an overhead cam engine.

[@bradjd6957]

I’m not the only one that heard that. I do notice that tfl from time to time mess up on technical info specifically Roman.

[@matthewholzmueller6292]

😂where are some pearls? I need to clutch them!😅

[@joshc606]

Gas is the way to go. Unless you use your truck for a job which means you tow or haul 75-100% of the time.

[@ALMX5DP]

1:02 but the owners manual still specifies an octane rating of 87 or higher..

[@slmjake]

Andre, you are the man. These videos are awesome!! Your suggestion for a name for that engine in my mind is too aggressive. I think a more tempered name should be Workhorse or Long Runner.This is a simple and durable push rod V 8. Only one suggested correction on your video. The truck is a four-wheel drive, so its AXLE RATIOS are 3.73. Not just a rear axle ratio but front and rear. You the man!

[@craigstark2712]

Not too surprised by the improvement with the 10-speed. That same transmission is able to get another 2 mpg out of the 5.3 in the half tons and about 1.5 mpg's when they started pairing them with my 6.2.

[@brucecollins8865]

Different transmission. The HD gets the Allison branded trans and the half tons get the gm/ford codeveloped 10 speed.

[@Billybob50119]

You forget to mention the added expense of the higher priced diesel fuel and DEF. After that the gas motor towing still cost less to operate

[@johnmorrison8351]

I had a gas AT4 on order but gave up waiting when I saw a Denali Ultimate on a lot. I didn’t really want diesel, but a bird in the hand is worth two in the bush. Love the truck. The diesel is strong and I don’t feel like I missed out by cancelling my original order

[@fit4ya1975]

Go and drive the Gas AT4 and you will love your Diesel even more. I had a 2020 2500 Denali Duramax, your 24 Ultimate is gorgeous, I just dont like the wheels at all.

[@johnmorrison8351]

@@fit4ya1975 I don’t like the stock wheels either, but I have the factory upgraded ones which are pretty nice. Have done a full chrome delete too. I did actually get to drive a gas 2024 a while back and it was okay. I’m still happy with mine though

[@fit4ya1975]

@@johnmorrison8351 Im jealous man! I love that new interior. Congrats brotha!

[@rsbreeze]

Nothing wrong with the big gasser, but if you've ever towed heavy with a Duramax, there just isn't any comparison. They do so comfortably, effortlessly, and safely! My diesels have been the least expensive trucks to own retaing 50% of the purchase price after 10 years and 150k miles.

[@cliffordmontana4562]

I agree. I always say if “you’re towing heavy over long distances” get the diesel. I have a new 7.3 Godzilla and it tows 13-15,000 pounds unbelievably well. But if I was taking those loads across multiple states I’d get the diesel.

[@oldnumber6]

Same here. I made my money back when I sold my first diesel and I've never lacked power in my 21 power stroke. I pull through multiple states with high mountain ranges and diesel is the best option for me

[@TB-dj8kl]

I feel diesels were worth buying before 2007, because the emissions came into play 2007.

[@agc7582]

Gassers have come a long way, as have diesels. For me, I haven't owned a gas engine truck since 2002, and don't plan on it soon. At least nothing I use as a tool. I've also had very good fortune with all (3) of my diesel trucks - 2003 Duramax, 2017 Duramax, now into a 2024 Duramax. The diesels have always gotten 15 - 20% better fuel economy than my last small block truck, and have so much more power. I still like gas trucks - I also have a 2023 Colorado ZR2, but it's more of a toy than a tool.

[@danielboatright6977]

Gotta love a good pushrod overhead cam engine

[@quikagc5]

That gas 6.6L is a good motor! Mileage is very impressive for a HD gasser with the 10-speed now. Great video as always, Andre!

[@Patty-qh3lm]

I've switched over from diesel to gas trucks because diesel has been constantly more expensive than gas in my area, and now, with the addition of DEF and the substantial price increase of the motor..... I just can't justify the price.

[@georgecass8529]

It's great for all you weekend pickup people

[@macbookpro57]

I’m always surprised with the mpg of the newer gm trucks. Our Silverado work trucks with the 5.3’s get like 22 on the highway. Wish my tundra got that lol

[@Javelinjoe73]

Unless towing something, I regularly get low 20’s with my 23 tundra

[@HaroldCombs]

Yeah I have a second gen. 15 mpg highway. With a tailwind. Unloaded

[@newtonbrook]

I am on my second 5.3. The engines are solid. You cannot beat the mileage on it. My 2022 5.3 sierra Denali gets the same mileage as my wifes 2015 Toyota Highlander.

[@freedomisntfree_44]

@@HaroldCombsmy sequoia platinum gets 22 and it’s a 13 with the 5.7 same 430 rear end as the tundra too 🤷‍♂️ y’all got heavy feet 😂 the pedal is very touchy though and if you’re not watching you’ll get horrible mileage

[@fongvang935]

The mpg numbers are all over the place. Some reports 13, some 15 and some 19. So i guess anywhere between 13-19mpg

[@Intwodeep902]

Engine name BBR big baller rolling

[@joemarine2]

It always depends. If you're a weekend hauler sure. You run pull all the time run diesel. It's always been this way.

[@DS5901]

I'd love to see a pdf with all the mpg tests for every truck available for download

[@hottroddchevelle]

One other thing no one ever talks about is that there are a lot of gas stations out in the middle of nowhere that don't sell diesel, only gas. I drive a diesel for work and there have been times i've almost ran out of fuel because I couldn't find diesel near me. On the other hand, every gas station sells gas

[@alanm.4776]

I drive a 2024 GMC with the Gas 6.6 and 10 Speed Allison for work and I’m not impressed. I recently hauled some metal canopies from Atlanta to Birmingham and man did it struggle. Average of 3 MPG, 65 MPH and 2,500 RPMs the whole way. I went through the whole tank before even getting to Birmingham. Considering the 6.6 and my 3.0 Duramax in my 1500 have the same amount of torque, I wish I had that torque instantly like in my 1500. I guess I gotta get use to the high revving, has a drinking problem gasser lol.

[@jessaphillips2846]

Tiger Jet sounds like a name FCA would put on a 4 cylinder turbo engine. I would suggest they call it something with max on the end to fall in line with the Duramax and Turbomax engines… maybe call it the Workmax engine?

[@SamuelRodriguez-yj7cl]

I think for my next purchase i will op. for the gas 2500 HD Silverado .

[@rileygraymountain3093]

Andre said "Hellaphant"🤣

[@Tempsho]

I would buy the gas one due to the fact it doesn’t have cylinder deactivation

[@fishinguns4975]

I like it because it doesn’t 👍👍Chevy’s track record of cyl deactivation, and longevity, is not good…

[@fishinguns4975]

@@googleaccount2637 amen!

[@The_Hi_Life]

Thank God, They finally paired it with the 10 speed! The 6.6 is actually a gem of an engine! The old 6 speed tranny was really holding it back.

[@mikedebear]

Until things change I'm buying gas engine pickups. It would have to get the same mileage as a Prius for me to willingly buy one of today's diesel engines. The constant emissions system failures sending the truck back into the shop means huge profitability loss for a business owner. I have to trust that the equipment is going to get the job done or i won't have customers for very long.

[@boatwhiskers63]

Same Here.

[@philiptaylor3796]

I'm waiting on my gasser... who knows when I'll get it as the strike keeps going. I am commenting cause I'm really happy with those numbers. Right now I'm getting about 9mpg with my express 3500 8.1 with just the tools and a pallet jack in it. They say you don't get an hd truck then worry about mpg's but this is going to literally save me $1000's

[@Utubeisazzho]

I towed a 15 dually 3500 ram with roll of dumpster on the back gas with 20’ 7.5 k car hauler fully loaded 1,500 miles avg mpg was 8.5 with a 40 gallon tank

[@randys766]

The manual for this truck specifies 87 octane, it specifically recommends against 85.

[@NWI_Steel]

It's different at altitude though

[@travisaugustine7264]

@@NWI_Steel that may be true, but why doesn't the owner's manual allow for 85 at altitude? I have to believe it has to do with how this engine is tuned and it's engine management system. I believe the reason Andre got such poor fuel economy. Towing is because the engine was pulling timing in order to avoid damaging detonation

[@jbbassin5389]

When the altitude increases the lower octane fuel in equivalent to the higher octane fuel at sea level.

[@ryanhessler8966]

​@travisaugustine7264 I live in Colorado and use 85 octane all the time in my 3.5 ecoboost. I've towed my camper to South Dakota 3 times now and up there is 87 octane. I notice no difference in fuel economy or performance between the two

[@travisaugustine7264]

@@ryanhessler8966 now that I find even less likely to be good for the engine because it is a turbocharged engine, which means the turbos make up for the lack of oxygen that allows for lower octane. I am willing to bet you have done significant damage to your engine without even realizing it

[@solvend]

Was always told they tuned the L8T 6.6 for 87 octane. Never ran anything below that through mine

[@boatwhiskers63]

Federal emissions standards have destroyed the cost of ownership and reliability in the new Diesel Trucks. They drive and pull great when they are not in the shop. 1st and 2nd gen Duramax's, Cummins and Power Strokes are some of the most reliable and cost effective engines ever built. The newer gas, 6.6 GM, 7.3 Ford and Dodge Hemi, will become the contractors choice of powerplant, and that drives the Light Truck market..

[@Johnny0005]

Can you address the 10 speed reliability? I have a 2024 3500 sierra duramax that is mis shifting after only 11k miles on it. I am hearing many similar stories. The 2024 Allison runs at about 140 degrees whereas a 2024 f350 6.7 power stroke 10 speed we had ran at about 210 degrees even in regular driving. The ford said lifetime sealed transmission which I did not like. I would love more details on the diesel and gas transmission options for HD trucks and reliability if you can!

[@richardguse3410]

Hey, better check at 5:55 the engine is an overhead valve, not overhead cam.

[@5585blazer]

Is Mr truck ok? Awesome content as always!!

[@dylanluhowy]

The “Duragas”

[@googleaccount2637]

Turbocharge & name it GasMax

[@bat__bat]

Eh, if it's pushrod it's "overhead valves" not overhead cams. The 5.3 never had a nickname either. And those have been stellar for gm. Thanks for putting these vids together regarding the larger trucks. These are very expensive machines and we need all the good info we can get before buying. I'm astonished by the curb weight of 7500 lbs. On a gasser.😮 Im still keen on a 01-07 Duramax with a little refurbishing. I just don't see any real advantage to these newer trucks unless you are trying to do CDL pulling houses or 6 cars at a time or something. Might as well get a semi then. Or at least the Duramax. These hugely bloated gassers are for campers or big boats up to 17k pounds or so. But I'm thinking a half ton truck can do big campers and boats too. 🤷

[@videopipeline6419]

If the towing the same 11k lb. trailer over the same loop requires 9.768 gal. of diesel fuel or 12.529 gal. of gas, then the fuel cost is the same for either one if diesel is 28.3% higher than gas, e.g.: $3.00/gal gas & $3.85/gal diesel. And that's just fuel cost, not including DEF and oil & filter changes

[@yoseflaurent3376]

I herein confirm the fair mpg we can get with this engine. I just broke in my brand new GMC and on a first 260-mile trip, with a lot of hills to climb, 7700 feet vertical in total, I got an average, by the computer, of 21.7 mpgs, riding at an average of 48 mph; temperature was 18 F and there was very little or no wind and average altitude was about 850ft above sea level, meaning oxygen content in the air was about 97.5% of normal, which DOES make a difference in a non compressed atmospheric air fed gas engine.

[@southshore74]

GM still has not solved their lifter issue with these Motors.

[@videopipeline6419]

In this test, @ 9:42 (no trailer): $25.91 for 5.746 gal = *$4.509/gal.* ?! @17:01 (towing ~11k lb. trailer): $52.23 for 12.529 gal. = *$4.169/gal.* ...which are drastically higher than typical Denver area gas prices any time this summer. As of today, the lowest gas prices in Denver are slightly less than $3/gal. & the lowest diesel prices in Denver are $4/gal. 12.529 gal. @ $3/gal = *$37.59* In their Jun 3, 2023 video of the Duramax Silverado pulling the same trailer over the same loop, they spent *$41.02* for 9.768 gal. of diesel fuel.

[@joshtaylor7451]

@TheFastLaneTruck why did Andre fill up before the run with 85 octane then after finishing the run fill up with 87 octane?

[@travisfisher3701]

Probably because he read the owners manual and learned you're not supposed to use anything less than 87 octane. 😂

[@kwasikyeremeh3734]

I suggest DURALITE for the nickname. Both are 6.6L and both are for HD trucks. The L8T is lighter so duralite😊.

[@brooksanddunn8347]

I just purchased a 2024 Silverado 2500 with the 6.6 gas motor and 10 speed automatic transmission. I love the Truck but it has been in the shop 2 times in 30 days for oil leaks 😢. I’m thinking rear main seal?? Leaking right from the get go is has me questioning my purchase. The Engine started leaking at roughly 500 miles 😢

[@blee8884]

I drive a 08 Chevy 2500hd with a 6.6 liter Duramax turbo Diesel and I get good mpg when I was towing a skid loader 60 miles one way.