The 2024 Chevy Silverado HD Has a More Powerful Duramax Diesel, But Does It Get Better MPG?

[@BearPapa49]

I have 6.6 duramax history In the past . I had a 2013 Chev duramax diesel. Beautiful. It drove perfect and with grace and power. I’m in the market again for a 2024 Chev 2500 diesel duramax 6.6 L !

[@alanj7306]

For that big and heavy of a truck, 18.1 mpg isn’t bad at all. I have a 2022 LT Duramax and I’m at 16.9 at 10,600 miles and that includes towing. I’m usually 18-18.5 not towing. My display is pretty spot on with the pump. I really can’t complain about that. My 04’ Expedition used to get 12, so it’s still a big improvement. The 35 gallon tank seems to be a really good size and offers a lot of range. Sometimes I only fill up once a month.

[@duggydo]

Gale Banks has a great video showing the updates to the engine. One of the biggest changes is stronger valve springs for more engine braking.

[@TFLtruck]

Agreed. That was a cool engine video.

[@judeh9835]

I watched it the other day, good video for sure

[@timsmothers8740]

Did you see the Banks Power release where they do 3 Dyno runs with the 2024 GMC. Pretty informative !

[@countcuda70]

The pistons were a lot different also

[@LeObsidianCraft]

If GM wants a better engine brake they need to add more than just stronger valve springs....

[@OneNationUnderGod.]

GM has always been known for the best ride in the HD market. Independent front suspension is a big part of that!

[@specforged5651]

And the reason I will never buy another GM HD truck until they change it. There’s a reason the others have trailing arm/link coil over suspension. That torsion bar shit is unbelievably outdated and is just garbage for an HD truck. I’ve owned two so I’m not just armchair quarterbacking it here ans do not have any brand loayalty. I go with what impresses me and is more sound mechanically. I’ve had a new Ram 3500 each of the last five years and they honestly were great. However, now that the Ford has changed the interior and given the Powerstroke another bump that is what got me excited. Granted my Powerstroke has 2300 miles on it but I’ve already ordered a 24’. I’m very impressed with the HO motor and that takes a lot.

[@OneNationUnderGod.]

@@specforged5651 I've never had a front end suspension or drivetrain issue on a GM pickup with independent front suspension and that is over half a million miles! I tow 90% of my driving anywhere between 7k and 17k lbs on a variety of trailers with the biggest being 38' Grand Design fifth wheel. Can't beat how well my independent front suspension rides instead of old outdated solid front axles!

[@alanj7306]

I have a 2022 Duramax Silverado 2500 LT and I really like the independent front suspension. What sucks is Ram trying to use it for the rear axle. That’s why their payload is awful and they squat so much.

[@gabrielback5615]

Another previous owner here, yes IFS rides better but didn't last anywhere near as long without expensive repairs, never again.

[@specforged5651]

@@gabrielback5615 My experience exactly. And honestly I wouldn’t say they ride any “better.” I think better is a relative term. Better to me means solid, tight and like a one ton truck should ride. They appear to ride smoother because they have lighter duty parts in them. Not to mention they have so many connection points, bushings, rod ends, etc, etc they start to feel loose, make a lot of noise and wear tires in a short time. The Fords and Rams just feel more solid and robust. Stick your head under there and it’s easy to understand why.

[@garysarratt1]

I have a 22 with about 30k on it. A couple weeks ago, we drove from NC to AL, about 340 miles, and I made myself stay near the speed limit for a change. I averaged 22.6 mpg on that trip! The truck is unforgiving when I get on it though, it typically does 18.5-19-ish with city driving or steep hills. Gets 10-12 towing 15k#.

[@ALMX5DP]

Unforgiving? Even that city/steep hills mileage and towing figure look amazing.

[@king502NB]

Try driving in a city like nyc and the mpg will look more like 13mpg it’s a shame they don’t rate the gas mileage in real cities instead they go to a small town and say that’s city mileage

[@garysarratt1]

@@king502NB Oh I have, there, Atlanta, Boston, my job takes me all over. And I think idling in traffic is almost as bad as hauling butt; you can see the number dropping while you sit sometimes.

[@garysarratt1]

@@ALMX5DP I mean the sharp drop from 20+ when things get less mellow. It does well for a 4 ton ox with a turbo V-8, but will bite you quick if you get in a hurry or want to have fun. I’ve towed several times in the mountains of KY, TN, WV, VT, NH and the uphill grades seem to subtract efficiency more than the downhill coasting adds. When I’m going downhill or level I will often turn off tow/haul to lower rpm. I calculate at the pump, too.

[@charlesc5983]

The manufacturer doesn’t rate the mileage. These are heavy duty trucks.

[@ricwestdoesitwork]

For a engine that most likely isn’t broken in not bad mileage. I see the MPG just getting better as the engine is broken in.

[@chucknSC]

My 2022 Duramax mileage went up a lot after break in.

[@richfarfugnuven6308]

My 2022 has 10k on it, and it keeps getting better. I also dropped a titan 56 gallon fuel tank under mine. I tow a 42-foot fifth wheel and didn't care for that small tank...

[@Pantelifts10]

​@Chuck Neil what will you consider breaking in mileage? I only have 1K miles in mine..it's great to think that mpg will get better

[@ricwestdoesitwork]

@@Pantelifts10 My 2018 GMC 3500 HD didn’t start getting 15 MPG city and 24 MPG Highway until almost 40,000 mileage. I just got a 2023 GMC 3500HD and day 1 Highway MPG was 17 and 14 MPG city. I now have 1,100 miles on my truck. I would think that the break-in would be about the same. Keep in mind these numbers are not towing numbers. Trust me when I say you will be happier with your diesel than a gasser. I had 2 GMC 2500 gas trucks and never got more than 12 mpg city or highway. Towing mpg was never better than 5 to 6 mpg, only got 6 mpg going downhill. JK about the downhill commit.

[@ricwestdoesitwork]

@@Pantelifts10 If you're at a 1000 miles you should be able to start towing heavy

[@Pantelifts10]

I get a pretty decent mpg towing for work almost daily with my 2023 Silverado HD. Helps that it's a diesel ofc. I like the looks of the 2024.

[@hitempguy]

I leave a lot of negative feedback in the comments, so I always try to make sure to give positive when warranted. This was a great video. Precise language, informative, not wasting my time rambling on about stuff of no importance, a reasonable length for the content provided. A+. More of this

[@winkdinkerson7190]

I’d like to see TFL undertake a long/term 3-5 year longevity test that focuses on HD Diesel reliability between the big three brands using real world use over an extended period. The KPI’s to include reliability, regular maintenance cost, tracked warranty issues, one-off maintenance cost, truck performance, and trouble free motoring. For $80 to $100K purchase price of todays vehicles, we consumers expect greater reliability included in these vehicles. No more junk GM, Ford and Dodge.

[@ALMX5DP]

People would rather see content of new vehicles. Long term info likely can be found on forums with owner updates and reviews and fuel economy generally tracked on Fuelly.

[@Tallnerdyguy]

Long term reliability for single items isn't really a fair comparison. If they had 20 of each, that would be a slightly better comparison

[@BoiseTDI]

100% agree! =)

[@jefffawcett1626]

These loop tests are instructive but there are a variety of factors going into mpg. What I've found on my '22 GMC Sierra AT4 6.2L here on the Gulf Coast (low altitude) is that speed is the single biggest factor affecting mileage. Around town the 6.2L does ok, 15-16 mpg avg. Hwy figures at Texas interstate speeds (80+) only improves to 17-18 mpg, but if I'm traveling 2 lane country roads at say, 70 mph or less, the mileage jumps to 19-20 mpg. I think the ride height w/ 2" factory lift is a big culprit. Can't fault the GM engine or the 10-speed auto... they're a wonderful combo.

[@GettingAGrip208]

Yeah these loops only tell so much. You’d have to have all vehicles you’re comparing it to drive in a single file line at the same time same route to be able to compare MPG. My 21 Cummins HO will get over 20 on two lane highways, but that’s not to say the others wouldn’t as well

[@rsbreeze]

Same for my Silverado ZR2

[@ericreid8111]

Now do it towing 17,000lbs. Also, you guys should do payload testing. You always test while towing but never test solely with max payload. Some people only use their trucks for hauling but dont tow.

[@jimmy4x4socal44]

The Canadian guy does it on his channel. I agree I have about 1500lbs permanently mounted in the bed plus I tow a mini ex and dump trailer. What brand you drive?

[@OneEyedRascal]

They did a max payload not that long ago on the ike

[@fireman1780]

They do. You obviously haven’t watched any. They do tests pulling the Guntlet out west. Its literally the steepest grade to climb in the rocky mountians

[@willrector9716]

My 2020 gets 8 mpg pulling 19k in the mountains....... very steep mountains

[@rodneytatman449]

17k? How about a GCW of 37k with a SRW? Depending upon the height(wind load) of the load, I can get anywhere from 6-9mpg with my 21 F350 on I80 through Pennsylvania or up Monteagle to Chat.

[@alanyoung4102]

To me that mpg isn’t bad. With the emission systems the MPG can greatly change with regens. I’m also curious about the gas engine mated to the 10 spd. I see that being a great benefit to the gas engine!

[@VLK-73]

I heard that the 10 speed tranny for the gasser is different than the 10 speed behind the Duramax. Can someone in the know either confirm or dispute that one?

[@chanceheimann919]

I haven't drove one but I feel the gasser and 10 speed would hold back the gas engine 4stroke Gas engines have a huge power band

[@XploreAz]

@@VLK-73pretty sure they are the same exact transmission.

[@techs1smh13]

​@@XploreAztorque converter will definitely not be same, the rest maybe

[@justinmartin8887]

@@chanceheimann919definitely wrong on that. Na v8 gas engine have a horrible power band only make reasonable power above 60% of their rev range

[@slmjake]

My Powerboost has only averaged 19.6 mpgs after 14K miles here in eastern U.S . Mostly highway at 75. Does better in city of course. Huge amount of torque but I desire a truck with more payload for a small truck camper some day so these videos are very helpful.

[@Tallnerdyguy]

Does better in city? Not normal

[@THUNDERSTRUCKRACING70]

Had a 2001 Duramax 2500hd 2wd. Got 21mpg and 31mpg with a custom tune download. She ran over 500,000 miles before needing a overall. Best truck I have ever owned ❤❤

[@paisteplayer1040]

Before the govt crippled them

[@PeterHeinrichs-o3y]

I love your KZbin channel I drive a 2021, 6.6 Duramax. My fuel mileage got better after 25k miles. I think that’s pretty good fuel mileage I think they get better after they get ran in

[@redracerproductions]

Seems pretty solid to me. Likely better than my '15 Sierra 1500 6.2 with level and KO2s.I'm happy when I get 18mpg on an all highway trip.

[@malcolmn.5222]

It's crazy how fuel efficient these trucks are getting I love it! My 5.0 2022 f150 averaged 24mpgs on a trip from Raleigh to Asheville NC. 26 mpgs in eco mode doing 60 to 70 mph.

[@ALMX5DP]

Have you adjusted your AFE bias, or is that hand calculated?

[@malcolmn.5222]

@ALMX5DP real world tested.

[@ALMX5DP]

@@malcolmn.5222 I presume that to mean hand calculated at the pump?

[@guamazolopez6456]

do you know how much a chevy with afm does

[@philipjamandre7509]

It is crazy, my 2021 3.0 duramax silverado gets 26 city and 33 highway lol. I've done trips where I have a tailwind and I'll get 35.8 mpg over the 120mile ride lol.

[@michaelcopeland8985]

As a truck driver, I see those new Ford powerstrokes on the side of the road looking for antifreeze just about everyday. Now I have a 2020 chevy Silverado 2500hd duramax, I can easily get between 22-23 mpg empty (best is 26), and 11-12 pulling my camper. Vary impressed with that truck.

[@pcmontgomery9743]

I drove my family members 2019 duramax empty no wind 120 miles which mostly highway and I got 24 MPG. I towed 13k 5th wheel on my return trip and got 12.5

[@damonens9478]

My boss said as soon as he hooks his 7 way plug in on his trailer it instantly drops his milage lol- trucks got 475hp and it can't get good milage towing , quite sad and I'm a duramax fan for life

[@patb7184]

Great video! And I have a suggestion. It would be nice to see a comparison chart at the end of the video of previous generation trucks. Ford and Ram as well. This could be with all your videos, including the Ike Gauntlet and anything else. Thanks!

[@outyxt800]

Got me all excited thinking it was the 6.6 gas with new 10speed. Hopefully you get that video up. Thanks.

[@binghamgate]

2022 Ram 2500 with the 68RFE has 100 miles on it did a 150 mile run similar road conditions the truck had 20.5. calculated mileage was 19.8mpg. not bad for new and the 6 speed tranny. I just went from a 2017 Duramax with the 6 speed alison which was very similar mpg. Like both trucks..

[@zacharymorris9917]

Is that 68RFE still alive?

[@whispanic]

My 2020 regular cab 4.3L 4X4 1500 would have pulled the same number. This is very impressive, adding 4 additional gears really helps.

[@alanj7306]

I’ve always liked that 4.3 engine. They’ve always been reliable and offer decent power and efficiency. Something about a big 6 cylinder revs my engine. I loved the 4.2 inline 6 (275hp/275 torque) in my 04’ Trailblazer. It was the 4-spd auto and super long gears that held it back.

[@whispanic]

@@alanj7306 reliability was the main driver for me. I never kept cars for a long time. 2020 broke me of that bad habit! So I bought for long term instead of instant gratification. That’s why I’m looking at HDs for the next truck because of the robust nature but I have no interest in turbos unless on a oil burner.

[@Mattss90]

My 2016 LML, before I put 35s and a lift, would do 23-24mpg on the highway. I thought that was crazy good back then. Driving in town and highway mixed, I’d get 15. So to me, 18 is amazing.

[@ALMX5DP]

What is your highway mileage? If you're getting 15 in mixed driving, sounds like you could be fairly close to 18 on a pure highway cycle no?

[@Mattss90]

@@ALMX5DP no sir. I swear on my life, doing 65-70 on the highway the truck was getting low to mid 20s. (When it was stock at least) Where I live trying to drive thru town was stop light after stop light. So my tank averages were coming out to about 15.

[@ALMX5DP]

@@Mattss90 I mean with the lift and tires. If you’re currently getting 15mpg mixed driving, what is your current highway economy?

[@Mattss90]

@@ALMX5DP ohhh. Those were stock numbers. With the lift and 35s’ I’m getting 10 around town and 15ish on highway at 65-70. Maybe up to 17 if there’s a tailwind

[@ALMX5DP]

@@Mattss90 oh gotcha.

[@dbx1233]

If this truck could go back 30 or 35 years, people would be in awe. Compared to those trucks, this truck beats them by a huge margin. Back then, no one would think it's possible for a "stock" truck to make 470 hp and 975 LB/FT of torque. Personally, I think it's astounding even today. (The price tag may be the most astounding.) LOL!

[@ModernCountryLiving]

Great data point. I think a longer run that includes a regeneration would be more indicative of real world expectations. My guess is (like Ford) it will stretch it out on the highway and suffer when in stop and go and hills. Regenerations will definitely have an impact, but curious about how much of an impact. My 2022 Ford F350 CCLB with 6.7 has impressed me over the last 3400 miles (since new).

[@GTOGregory]

I just ordered my new 2024 LTZ. Thanks for the mileage test. Now that I have it the truck gets about 16MPG around town. If I keep it under 75 MPH on the highway, then I'll get 20MPG on the highway. However, if I go 85 MPH the mileage tanks.

[@ArtbyLordTV]

Really?!! I drive like a granny with the same truck and get 12/13 in town and 15/16 on the highway. I live in flat north Texas!

[@GTOGregory]

@@ArtbyLordTV I do use a fuel additive and oil treatment. With a tune and new turbo I expect to pick-up another MPG city and highway. Then I'll be where I was with my old LML which had a few tweaks. I expected the Allison ten-speed transmission to be more helpful mileage wise, but it isn't. I'm sorry about your mileage.

[@ArtbyLordTV]

Yeah I swapped out the intake for a cold air, I use cetane booster and still crappy. I did throw a code in the first 200 miles about the emissions system which GM said just to clear and send back. Wondering if it was really a problem and they just ignored it

[@GTOGregory]

@@ArtbyLordTV I remember reading there was a problem with the DEF system. The dealer salesman said I should only use GM DEF. But, even the low-cost Walmart brand DEF meets "API regulations and ISO 22241 standard for purity and concentration." So, BS on that! I installed a 100 GPH FASS fuel system on my LML and will again on this L5P. It helped more than I thought it would. Expensive, but worth it! Right now I just have a K&N air panel intake filter. I use the Power Service and Lucas fuel additives. The oil gets ZMax.

[@slaytanic921]

Another great vid Andre. I’m waiting for the 6.6 gas VS the Ike 🦾🦾🦾

[@aaronduboise5277]

Yes we need that video and the towing mpg loop

[@mitchellholmes3285]

Same as 6.0L 13mpg with a strong tail wind if you lucky

[@ElectricBlueIX]

My 2011 1/2 ton Sierra with small lift kit, 34 inch tires at 65 MPH on level surface can barely manage 18-20mpg. For this truck to get 18mpg is impressive.

[@mitchellholmes3285]

I owned a 2021 Chevy 2500hd duramax that averaged 18 to 20 mpg average driving. I now own a 2024 zr2 that just turned 4k miles. So far I am not to impressed with my mpg 13 to 15 mpg. I generally don't judge mpg until 5 to 6k miles on odometer. I really love my truck but hope the mpg comes around a bit with a few more miles. Great truck

[@fit4ya1975]

Is the ZR2 2500? Also how are the seats? I have a 2020 and they are very hard. Nice truck btw

[@MrAllister9]

my 2014 has the EFI live and since i did that ... went from 750 800km in town .... thats not pulling my trailer ... now its easy 950km per tank and highway will be 1200km if im around 110km max ... and those are honest numbers i get

[@marcelo403polo2]

My deleted LML with H&S tuner was getting same numbers. MY 24 AT4X I m able to do 700km in city. I have more dislikes then likes about it

[@slmjake]

Thanks TFL for making all these videos!

[@bernhardjordan9200]

Banks has a video analysis of this new engine in comparison with the old one

[@ryanrichardson9915]

I ain’t gonna lie, I’ve owned 4 GMC Sierra 2500 Denali trucks, but the High Country looks great!

[@joseramos7476]

As time goes bye it only gets better, that’s my experience with my truck.

[@luckyshu2250]

My 2020 gmc 3500 got about 5mpg avg more than my 2024 gmc 3500 I have 24,000 miles on this one. MPG suck big time. On straight away no wind. 2020 22-24 mpg. 2024. 17-20 mpg. Going 65 mph.

[@zebmccollum]

My 2005 GMC Sierra 1500 gets just over 12mpg with city and highway. 14mpg+ on a good day with the best I’ve ever got being 17mpg+ driving 55mph with no wind.

[@richfarfugnuven6308]

It would be interesting to know if the truck went into regeneration mode during that loop as well. That will always hurt your fuel economy.

[@guamazolopez6456]

yes

[@mainenhbassmen5759]

it wouoldve dropped to about 11 lol, i have a 2021 that if i averaged 35 mph would be getting about 25 mpg, mine also gas 91,340 miles

[@Lalaafastroli]

this truck has the same mpg as my 2008 acura rdx that averages around 18-19 mpg. this is impressive for this size truck

[@joerosier6059]

Would like to see how this mileage compares to that of the 6.6L gas with the 10 speed tranny.

[@bjenkins803]

My 2020 duramax gets 25.1 mpg and it's great. While pulling my 24ft cargo trailer loaded it gets 15.3. I'm very happy with it. The gas version gets 12 at best not pulling.

[@chucknSC]

1500 or 2500HD 4x4 crew cab?

[@bjenkins803]

@Chuck Neil Yes sorry. Crew cab long bed 4x4. Stock size wheels.

[@299charles]

Gas will get 6-8 pulling…..10 at best

[@bjenkins803]

@299charles That's terrible. My 2005 Silverado crew cab gasser does better. Not a lot better but considering the age difference you would think technology today would be a major improvement.

[@CanadianDuramax]

This is kind of funny. I have an 06 LBZ Duramax, Straight pipe, cold air, tuner and 35” tires. I’m getting close to 30MPG cruising.

[@shuttlepilot_]

Custom ordered and received a 2023 LT Gasser. Watching this series more I feel I got the better truck. I don’t tow massive trailers though.

[@JetTech1966]

I've got a 22 gasser and love it!!

[@slidewide1999]

Why?

[@jflowers090]

Makes me feel so much better about my 6" lift 35" tires 2007 duramax getting 16 mpg on the highway.

[@rsbreeze]

Should be able to get 18 mpg with good tune.

[@woodysrockspyro6436]

Just traded my 2023 gasser in for a used 2022 6.6 diesel. It has 50x miles the overall milage reads 18.3 My 6.6 gasser was at 12

[@AzRiverGuy1]

Not bad but my 04' Cummins 2500 with 272,000 miles, auto 5 speed, 4 door, long bed gets that around town. Like any vehicle, after a good break in period, you find the sweet spot for that truck. Know when to accelerate easy or hard depending on the conditions. I have noticed in 8 speed vehicles if you accelerate quickly in the lower gears, the engine is easier on the fuel consumption.

[@asseenontv2117]

I believe why the trucks trip gauge was higher than your calculations was because of the prior miles traveled in the vehicle being at a higher efficiency.

[@ALMX5DP]

Didnt he reset the trip computer?

[@SteveR-ym3yc]

He reset the trip computer.

[@brianbean2571]

We aren't looking at a daily driver, it's a heavy truck for towing that it does very well

[@TaigaTurf]

Chevy/ GM pickups are really upping their game..

[@JohnMarley4]

Can you do some reviews on the new gas with the 10 speed?

[@TFLtruck]

Yes. This is coming soon.

[@pryme2013]

There is a guy out there already doing tests with one. He concluded it doesn’t get any better mileage than the 6spd and also the final drive is about the same so that makes sense. He said 0-60 is actually a tad slower on the 10spd but it is quicker in passing acceleration.

[@NWI_Steel]

​@Barbells, Automobiles and Projects makes sense. We kinda hit diminishing returns once we hit 6 speeds. Because final drive is usually close to the same. Just more stepped gears to get there. So ya as you said stomping it on the highway should be faster for passing power

[@IleBudic]

What's with running 70PSI in an empty truck, trying to hypermile?

[@jasonpitts8395]

If you pay $90K for a truck should you really be concerned with MPG? Thx for the always awesome content at TFL!

[@1guyin10]

Actually, you should be concerned with mpg because it directly impacts range.

[@JohnDewh]

My 22 F350 cost 70K after taxes. I actually look st MPG.

[@MadMaxZ06]

@@1guyin10 THIS!!! Range from a full tank is SUPER important

[@Pantelifts10]

I did when I got my Silverado HD but I also use it for work most of the time and claim the gas as business expense.

[@DuraMaxDieHard101]

I have a lifted 2022 3500 Duramax with all Banks, turbo pipes, cold air intake, exhaust on 35s and get 22 mpg at 80 mph. I think you need to do another test on a calm day.

[@adrizzy5594]

I just got a 2024 rst 3.0 diesel getting average 28-32 hwy

[@rocketj7449]

My 2021 will average about 17-18 mixed with a light foot. 20-21 mpg highway.

[@thebiblicaldigest]

You had a 10psi difference between your front and rear tires. Fuel economy would have been a little better if they were all at correct pressure.

[@samo8204]

Did you make sure the tires were at MAX P.S.I. Cold?

[@The4Cornergames]

First thing I noticed when switching to powerstroke to duramax was the mpg on the highway was really really good much better then the powerstroke but my city mpg is trash

[@davidduncan6801]

Did they fix the trailer TPMS of only 100psi? What about the bed camera, can you zoom in for hitching a fifth wheel?

[@zacharymorris9917]

This is NOT REAL WORLD TESTING. If the truck was deleted, sure. But it's not. Testing a modern emissions equipped diesel's MPG at low total mileage is ALWAYS misleading. A short trip like 100 miles is also ALWAYS misleading. If it regens, the results will be abnormally low. If it doesn't regen, the results will be abnormally high. You have to put enough miles on to foul the DPF, and you have to test a long enough trip that it definitely catches a normal regen cycle. Even if you control for those variables, when the DPF starts to clog, MPG will drop off sharply.

[@marcelo403polo2]

my 24 at4x goes to regen every 200 miles. I don't get it why so often. LML in past before deleting it, it was once a tank of fuel, like every 600 miles

[@zacharymorris9917]

@marcelo403polo2 yes sir. That's exactly my point. A clean tune will extend the regen interval dramatically. You can thank the EPA for having such a dirty tune. How ironic that they force manufacturers to make a "polluting" tune just to force the owner to burn extra fuel to clean the "polutting" tunes exhaust filter. So obviously counter productive.

[@zacharymorris9917]

@@marcelo403polo2 I kept my LML for this reason, and because 15/16 is my favorite body style.

[@CptStumpy]

60-70 psi tire pressure? Is that normal for these trucks or is it set that high just to get better MPG?

[@tannergregg4190]

This very normal. At work we run 70psi front and 80psi rear on our 2500 trucks.

[@mendonesiac]

I'm imagining a world where the trucks didn't go back to 1970's sizes and utilized modern technology to get 30 mpg... a man can dream

[@oscarsalinas7708]

You who know so much about trucks, which engine do you consider best between power stroke, cumin, and duramaz, which is better for heavy work

[@machfive916]

MPG numbers were pretty much as expected. Happy Monday everyone.

[@Lunatech04]

How come you never show the dash info on mpg

[@bradwilliams4921]

Sounds good to me. My dad’s 2001 Chevy S10 with a 4.3 (I think) gets about that same mileage (I think).

[@chucknSC]

When pumped, Diesel fuel makes a lot of foam on top. You aren’t going to get an accurate volume measurement using a station pump. The only way to get anywhere near the actual mileage is on a full tank or use a glass container, etc. Or just use the trucks computed numbers.

[@PoliticallyIncorrectMechanic]

With having an average speed under 40mph that sounds ok. I was more interested in what it averaged on the highway. My 05 2500hd 4x4 consistently got 22-24mpg on the highway as long as I was nice to her. I expect this truck to be better than or at least even that. Especially with 10 gears.

[@Diddley-js6lf]

I have a 21 GMC Crew 2500 w/ Duramax That Truck at 70,000 Miles Get Right at (22) Twenty Two mpg. My New 24 GMC Grew 2500 at 8700 Miles Gets (19) Nineteen mpg. From Sevierville, Tennessee To Clio Michigan On Less The One Tank Of Fuel. I Actually Pulled in Our Driveway with a 1/8 of a Tank of Fuel Left. Now Keep In Mind Both Trucks Have Rough Country (4”) Four Inch Lifts on Them With (12”x37”) Nitto Tires. Not Tunes. The Trucks Are Identical other than the Upgrade 6.6 LP5-2 Generation. The 2024 Can Brake The Rear Tires on Dry Roadways. My Company Has Owned Every Diesel GM Has Ever Offered other than The V-6 3.0 in a Oldsmobile Cutless 4 Door But From the 6.2, 6.5, First Duramax with Every Motors The Came Factory With.. Now The Most Responsible, Torque, Horse Power, The Best Designed 6.6 Dirty Max Ever Built.

[@1lowtrade]

Should i trade my 1500 silv for a 2500? I do alot of light duty hauling

[@RonnN-gf8tm]

Glad they kept the column shifter...Nice.. Thanks Andrey.

[@kirkdunn1379]

truck only has 1000k miles on it as well, have to imagine it will get a lil better as motor gets broken in just bought my first duramax and very new to diesels..2024 GMC 2500hd, lil bit worried tbh about short trips which i do...just couldnt find a gas and deal i got was pretty good so it cancelled out the cost of diesel upgrade I avg 20.9 on 130mi trip back home last night but more sea level than colorado

[@michaelmoore9385]

Cummins can also be optioned with 50 gal fuel tanks.

[@wesrushing5218]

Love it...Awesome truck , so much better than electric truck. I would like to see a challenge been a gas or diesel truck vs a electric truck. I know the gas truck will win by a long shot. Electric loses so much range once you put it to towing or even turning on the a/c or heater you lose half the range.

[@natep1661]

The IFS makes them far more comfortable of a ride than ram or Ford. Solid axle better for off road, but IFS def better for on road comfort.

[@stevensilva1350]

I want to buy the LTZ midnight with leds all the way around, full size arm rest an duramax.

[@greglangford1840]

I do like the truck, but I will say that I got better with the Ram 2500, even though it is not apples to apples. Very good outcome, I think.

[@revistadearmas]

For dragging air sound right

[@paulsmith-ld8xl]

My next truck

[@deltadog3812]

My 2015 duramax averaged 18.5 over 13,500 miles

[@jon27d]

This might be the record for the closest In vehicle MPG versus real world calculation I've seen on TFL. The fact that a brand new truck was only off by 0.3 MPG is impressive

[@JsGarage]

The newer vehicles seem to be getting more accurate. My wife’s 23 Tucson is usually 0.25-0.50 mpg of the hand calculated result.

[@roywadsworth4452]

mr truck what is the mpg on the 2024 silverado custom z71 diesel pickup truck

[@xfactor5876]

It would make this video more meaningful if you would say how this truck MPG compared with your tests on earlier duramax trucks.

[@alanhale6494]

I would love to have the 2024 silverado with a 540 cubic inch big block and the Allison 10 speed and maybe add a procharger it would be one great truck then!!

[@CS-rb9jk]

Have you noticed dead pedal in the 24 Duramax? I just did a test drive on a 24 LTZ. From a dead stop if you hit the throttle quick at least 1/4 or 1/3 down, it had dead pedal for almost 3 seconds. I mean i hardly responded then hit real hard. Also driving around the diesel just didn't seen responsive till it spooled up. I found it rather annoying. Seemed like a lot of turbo lag. What's your experience? Did the truck learn and improve?

[@dan.w.turfgrass9256]

It’s torque management. Have you tried brake boosting

[@iicjguitar0416]

How does this compare with the 2004 Chevy Silverado?

[@Tacosauce81]

That isnt bad considering the truck hasent broken in yet. I owned a 2015 Denali HD Duramax short bed with a 26 gal tank. After about 25k miles I would average around 670 miles per tank! At roughly sea level. Not towing obviously. When towing and in the mountains. I would Average around 17 to 19 mpg

[@Broncort1]

We’re you in AWD or 2WD? I think that would make a difference in MPG.

[@realistic.optimist]

At 10:47 he gives his results.

[@prostreetcamaro]

Sinclair fuel stations look identical to BP stations here. BP used to be Amoco here. Just rebranded in other parts of the country I suppose?

[@aaronmorgan301]

I get 25.6 on long runs around 8-12 in town

[@AnthonysOutdoors]

Please do the 3.0 LZO Duramax!

[@vancekeith5642]

You did not mention 4X4 or two wheel drive? You did say Z71 so I guess maybe that =4X4?

[@junkzombiesllc3259]

It's still a shame that a 02 duramax can still get the same mpg mostly. You would think over 20yrd, they would approve it a little more.

[@Tallnerdyguy]

Except they burn 30x cleaner

[@williamchoza1227]

My work truck is a 2022 2500hd gasser. Even when pulling or just driving myself to work never gets better then 11.6 mpg. Is that normal? I got. Utility body thou also

[@Bradimus1]

Normal. You drive a big steel brick.

[@madweazl]

My Ram 2500 with the 6.4 and 4.30s does about the same. Such is life with a gasser. We just got back from a 2173 mile drive towing our 5th wheel (about 12.5k pounds) and had to stop for fuel 15 times lol.

[@garysarratt1]

How heavy?

[@timluscombe4949]

Do a review on the new LZO towing!

[@will-iamhim8519]

You got to think about the diesel that's in the fuel lines. We just add more to it

[@Bennyboy46a]

remember when the 130 hp non intercooled cummins ram was the bees knees for towing?

[@rmccain99]

I want a 3.0 diesel option with the 373 rear in a double cab standard bed. Why can't they figure this out. Why do I want this ? Towing an ultralite fifth wheel is too much payload for a half-ton.

[@Zer0_336]

Need the 6.6l gas mpg now.

[@pryme2013]

There are videos of the new 24 with 10spd already. No different in gas mileage vs 6spd

[@TFLtruck]

We will do one soon.