Chevy 2500 6.6L GAS (L8T) Engine **Heavy Mechanic Review** | TOP 3 ISSUES

[@YOMAMASSIDEDUDE]

I've owned a couple of these trucks now with the 6.6 gas. I tow a decent sized 5th wheel about 12,000 lbs. Probably half of my mileage is towing. I personally haven't experienced any oil consumption on either truck. I believe the oil issue was limited to a certain number of engines, not just the 6.6 in general. Otherwise a solid engine and perfect for those who don't want to spend the money on a new diesel. Love my 6.6 gas and that's coming from someone who has owned both Cummins and Duramax 2500/3500 before.

[@TheGettyAdventures]

That's exactly that the 6.6L was designed for, to be a very reasonable alternative to the diesel engine and not have to deal with the modern diesel headaches that come with those engines. but the 6.6L is a complete work horse and I think people are going to like them.

[@YOMAMASSIDEDUDE]

@@TheGettyAdventures 100% everyone loves diesels but always forget to mention how often they sit in shops or are basically thrown in limp mode over various emissions related failures. Then spending $5-8k on injectors or fuel pumps. In my opinion, the days of 500,000 reliable diesel trucks are gone.

[@chrisk6159]

Yep I’m in that category. Getting rid of my 2017 Ram Cummins diesel and going with the Chevy 6.6 gas with the 10 speed. I use the truck mostly for towing a travel trailer and getting tired of the emissions failures and other cheap FCA parts failing and leaving me stranded in remote areas.

[@demsakawalkinglatetermabor7ion]

What is the mpg you’re seeing? I’m considering buying a 2021 with 100k miles.

[@YOMAMASSIDEDUDE]

I average about 14-16 unloaded mainly rural roads. When towing my 5th wheel I get between 7.5-9.5 Basically the same fuel mileage as the duramax I traded in on the gas. @@demsakawalkinglatetermabor7ion

[@edwardd.4746]

I had a 2022 Ford F-350 with the 6.7 diesel I tow every day I had nothing but engine issues two pistons turbo list went on at 18 thousand miles the ddealer replaced the transmission for the second time traded it In the day i got it back have had my 2023 GMC going on a year and a half now and twice the mileage with zero issues love my truck

[@jonbrowning6839]

My 2022 GMC 2500HD has had a catch can from new, uses no observable oil between changes per dipstick, but the can grabs about a tablespoon or so every 1000 miles or so. I also think this engine takes longer than 5k to break in, it continues to get progressively smoother and quieter with 16k on it. The first few thousand miles it had some clatter that was concerning. Mileage is very good for a 4x4 HD truck, averaging 15.9 in mixed driving, close to 18 on longer trips. Excellent value in my opinion.

[@panchovia]

At what mileage can I tow?

[@panchovia]

I’ve got 648 miles so far

[@erikgreenip3191]

I have a '21 with about 36,000 miles so far. About 9,000 of those are towing a 12,000 lbs. 5th wheel. I haven't had any issues so far , I'm pleased with the capability of the 6.6l

[@JetTech1966]

I love my 22 Custom model gasser!! Best damn vehicle I've ever owned in my almost 57 years on this earth. 16k plus miles now, I can't wait to drive it to work tomorrow, heck I can't wait to drive it everyday. Towed our 8k lb camper over 4500 miles with confidence and ease. Even if we give up the camping life in the future, that truck will be with us forever. I could care less if I ever tow anything with it again. My wife and I absolutely love it!! We call it our beast because it definitely is a beast! Oh and zero issues so far.

[@TheGettyAdventures]

That's awesome to hear! these 6.6L gassers are pretty stout engines and built to be worked.

[@samganci446]

Getting ready to purchase a 2024 6.6 10 speed. Review was very informative. I currently own a Cummins dodge 07 model. So debating diesel or gas, this is good news. Thank you!

[@gabrielremodels7507]

I’ve had my 6.6 gas for two years now! It has 56000 miles it’s my daily drive, I’ve been really impressed with the gas mileage, I do a lot of city driving and got it because of the flex gate feature for lumber, it has way better gas mileage in comparison to my old 2017 5.3 v8! I really do recommend this truck!

[@bloodbushcraft2467]

My 2017 5.3 I could get about 19mpg doing about 60. This truck I can get 17/18 mpg with the bed open but with my topper on I get best 14.5. what do you get

[@everlysuniquetimbersawshop]

Did you notice as you got more and more miles on it, the mpg’s got better? Meaning after the 500 miles break in?

[@richardoliver1621]

2024 hd 6.6 gas 20,000 miles. No oil burning.Use quality fuel. Change at 50% every time. Tow 8,500 regularly with ease. Daily driver. LOVE MY TRUCK! Only noise is vane in oil pump sucks air sometimes but normal. Pulled and worked truck as normal after 500 miles. Truck is a gas burning beast.

[@alexfernatt6895]

I’m a service manager over a fleet of these trucks. They range from 10k miles to 250k miles. I’ve seen all three of these issues between the trucks we have, including the 6 speed transmissions being garbage. We’re going to start moving to the diesel because these just keep having issues.

[@chadmiller6487]

I'd imagine you'll have WAY more issues with the duramax than these gassers. If you're getting +250k miles on these gas fleet trucks that's pretty damn good 👍

[@OgreMoto]

My dad has had 4 failures with his def system and an injector go out in 45k miles on his 2020 duramax. He’s switching to the gasser before the warranty is up because he doesn’t trust the diesel anymore lol. At least with the gas you won’t spend an arm and a leg fixing it plus it’s super simple to fix in comparison.

[@RacedGuy]

Our first dlewt 6.6 10spd is at 15k. It's had a trailer towing heavy from day 1 90% of its life. So far burns 0 oil, is a massive improvement over previous 6L 6spd.

[@TheGettyAdventures]

this 6.6L is miles ahead of the 6L

[@odelldickey2218]

I remember back in the mid 1970s we had 366 and 454 Big Block Chevrolet trucks and burning 1 quart every 1000 miles was normal, just the nature of the beast , always check the engine oil first thing in the morning to get an accurate reading. These were great machines, real workhorses . Thanks for the video.

[@Pantelifts10]

Yeah but 50 years after and for how much they cost now, you shouldn't have to do that

[@Back_door_bandit_98]

@@Pantelifts10That’s how operating equipment works you do routine maintenance which includes checking your fluids doesn’t matter if it’s a vehicle or heavy piece of machinery also since you want to bring up how much they cost than wouldn’t you rather be ontop of your fluids instead of letting some 22 year old kid at a dealership that has no clue what he’s doing mess your stuff up.

[@jeffwolf8018]

​@@Back_door_bandit_98you cannot argue those facts..

[@BennieSwift-f3k]

I own a 2022 chevy 6.6 gas 6 speed 13000 miles on it. It's been flawless 17 to 18 mpg on HWY cruising 60 to 65 mph I Love it its a work horse.

[@TheGettyAdventures]

that's awesome, these engine are work horses, built strong.

[@davidbrooks2119]

I have a 2022 LT Z71 and no issues here either. Change oil at less than 5k. I have 18.5k on it. Had a catch can on it since 3k. Followed break in instructions. Wish I had waited for the 10 speed . Mostly mixed driving with 15 mpg. All Highway driving it gets 17 mpg. No knocks but belt pulleys are noisy about 2-3 mins after startup.

[@MXvsATV144]

I wish they had a 10 speed, probably be better mpg.

[@digi3218]

​@@MXvsATV144I think they do have a 6.6l gas and Allison 10 speed combo on the 3500s

[@buckmeredith1720]

@@digi3218 They have the 10 speed on both for 2024.

[@JimSteffen-nn3cj]

I've owned a 2024 GMC AT4 2500HD since July with 10000 miles now, so far I'm liking it. It pulls my 30ft enclosed trailer nicely at 8.5 mpg at an avg. 65mph, daily non-towing mileage is 14-16mpg. No oil consumption found yet per dipstick.

[@dieselmutt8865]

Engines that get worked hard right away when new are probably a lot less likely to burn oil than ones that are "babied" when new. The higher cylinder pressures of being worked hard right away are likely to seat the rings in right away and eliminate the oil consumption issue early on.

[@DoyleHargraves]

The worst-running vehicles i've driven were all babied. Engines were all coked up and bogged down. I give all my vehicles an Italian tuneup daily.

[@solvend]

I picked my truck up on a Friday and we left town towing a 8500lb travel trailer on Sunday. I purposefully drove it about 350-500 miles before we left Sunday. But mines never drank a drop yet.

[@ottocuyler5326]

We bought our 2500 6.6 gas in Feb 2020. We broke it in for 500 miles, then towed our 10,000 pound boat to Florida and back to NY over 3,000 miles. That motor and truck has been flawless with no significant oil burn through 60,000 miles. Of that, approx. 20,000 of that is towing heavy. I think you’re being a bit tough on this motor given its wide acceptance. With respect, I did not subscribe due to the negative vibe for this truck and motor with zero positives, which are many, evidenced by the subsequent comments here.

[@27dmarshall]

2024 GMC 2500HD w/ 6.6L L8T gasser. 9,000 miles... zero oil burned from day 1. Seems like 2020->2022 units had more occurances vs 2023+ L8Ts. Love mine. Would definitely buy again.

[@SweetDaddy747]

Same here, almost 10k miles. No issues so far. My last 3 trucks were 6.6 Duramax diesels and I’m enjoying this new L8T gasser

[@Eddie-yc5yd]

Absolutely , change oil and filter every 5k.

[@TheGettyAdventures]

Yep 5k miles is a great interval to change oil.

[@stevenstair1068]

3000!!! Oil is cheaper then metal, besides your filter is only good for about that same mileage no matter what brand you use

[@scottmartin5671]

I just bought a 2024 Z71 2500 HD today. I addressed these issues with the head tech at the GM dealership. In the last 2 years, he said they have had few issues with any of them. 2 front seals blew out the front of the transmission at 30k a couple of years ago. Both were covered under warrantee. He also recommended changing oil at 3k miles. Growing up in a racing environment. cars, Harleys, and marine, I've know some very good engine builders who most swore by Seafoam and Marvel Mystery oil, which both are on my shelf today. I asked the tech about using these in my new truck, and he replied obsolutely. I'm 64 and have used these products for years in the old big blocks, and pretty much anything with a motor, for reducing carbon buildup, and ping noise. I'm posting this because I've read a ton of reviews, and none of the comments I read mentioned this. Yes there may be other products you may prefer, but my point is to use some preventative maintenance.

[@donrichter3523]

@scottmartin5671, Seafoam or Marvel Mystery oil won’t do shit for this engine, assuming you are adding it to your fuel. It’s direct injected, so the injectors are downstream of the valves. It won’t clean the valves. Now the injectors can still carbon up, but for that, occasionally use Chevron Techron or other cleaner with PEA.

[@donrichter3523]

@scottmartin5671, Seafoam or Marvel Mystery oil won’t do shit for this engine, assuming you are adding it to your fuel. It’s direct injected, so the injectors are downstream of the valves. It won’t clean the valves. Now the injectors can still carbon up, but for that, occasionally use Chevron Techron or other cleaner with PEA.

[@solvend]

I have one of these in my 2021 2500HD and i bought it for towing my travel trailer (8500 lbs) and its never burned a drop and ive towed 30k miles with it now

[@jeffreychandler6567]

2021 3500 single wheel single cab 56,527 miles pulling tractors, hay, trucks, large boat and barge engines. I change my oil every 5,000 miles using GM dealership and their synthetic oil, I cannot see any oil usage. Traded a 2016 Ford F250 with 6.7 diesel that I was about to be on my third radiator in 65,000 miles. Had to pull my horse trailer or a heavy load to get EGTs up to clean out exhaust system. Just needless miles. Ford did pull great but not worth the problems.

[@leedyp]

I’ve got a 2020 with 31600 miles no issues pulled a U-Haul for 2000 miles couple months after getting it . Drove from Kansas to Northern California no problems .

[@jessethigpen3157]

My 2022 gmc 6.6 gas does pretty good, I occasionally pull 19000 pounds with it and it doesn’t do bad, I have 97000 miles on it and idle it all the time for long periods, its a good engine but it does use a little oil but I always check it and add oil

[@kirkhiggins3044]

Question sir. If you were buying a 3/4 ton gasser all other things being equal and planned to keep it a long time would you buy the Ram 6.4, the GM 6.6, or the Ford 7.3. Thanks

[@Clevelandsteamer324]

The dodge should never be considered ever anytime

[@icutlawnservicellc7891]

😂😂😂😂 6.4 hemi is junk!!!!

[@stevenstair1068]

Anyone that i know that owns one absolutely love it and have absolutely no issues.. I installed a catch a can so any water oil vapor is collected there and not burned..

[@chrisborns5972]

My coworker got a 24 with the 10 speed the transmission was replaced after 3 hundred miles and took the dealer 3 weeks.

[@TheGettyAdventures]

what when wrong on it?

[@chrisborns5972]

@TheGettyAdventures They claimed Trans controller and they couldn't get one so I don't buy that.

[@JacobHuber-ci6yu]

2021 owner here. Oil consumption through the roof, low oil light after 2500 miles each time after the last two oil changes. Took it in to get looked at, “oil leak somewhere in the engine.” Dealership will be running tests on it in the coming days.

[@justinbrackeen4064]

My 2020 -new at 3k we oil changed it.2k miles later low oil light. Zero help from the StealerShip after their test.. just rolled 100k last month

[@ashleymalone5396]

Dont know if anyone has mentioned it, but consider the constant trend across the industry to lighter and lighter viscosity oils. Maybe in an attempt to reduce parasitic loss and freer flow. Think HP numbers and EPA/Cafe regulations (higher mpg). A slightly heavier viscosity oil would/should reduce consumption and increase lubrication. Think back to when you went from 30wt to 40 wt as your engine got more miles years ago. Just a line of thought.

[@steveg5524]

Agreed. If this truck engine is doing considerable work (towing), I would use an SN-rated 0W-40 or 5W-40 oil. These two oils are outstanding, 1) M1 FS 0W-40 and 2) Premium Blue Extreme SAE 5W-40 Full Synthetic (SN-rated).

[@jessesager9460]

I currently own a ‘19 2500HD with a 6.0. It runs rather well, but it has that mystery noise under the hood that varies with how much gas it gets. I took a mechanics stethoscope to the fuel rails, and they were quite noisy. Otherwise the thing runs like a scalded dog. Good review on the 6.6! Cheers 🍻

[@houstonbrown3450]

I have a 2011gmc 2500hd, 257,000 miles no oil consumption, change every 5k ,runs great

[@danieldelgado3008]

I’ve only ever had to service/and or replace 1 of these engines in my 4 years doing heavy line at my gmc dealer, that engine had a failed piston connecting rod bearing. Other than that never had to service a single other one of them for ANYTHING

[@jeffpaul738]

That oil life monitor is great. We sell lots of parts because people follow it ;) . I myself try to only go 3000, kind of old school but i'd rather pay for an extra oil change not an engine.

[@dantecrescenzi-dd9rm]

I have had the same basic truck under my rear since 1982. The 82 ,85 ,87 were 3/4 ton -2 whl drive 8ft bed ,the 89 was the first 4 whl drive ,2004 was extended cab 4 whl drive and the 2023 is a Carhart crew cab and 6.5 bed .The 2023 is the best riding and the most fun to drive of all them .As of today I have driven just over 12000 miles it has burned about a quart over 4000-4500 miles .It has towed my 7000 lb boat and trailer with ease, this is my final truck, and it is equipped as my toy as all the others were just a cut above a work truck. For all of the last 40 plus years I have changed the oil at around 5000 miles and despite having fully synthetic the oil percentage has reached 15-18 percent at about 4800 miles so much for the 7500-mile syn benefit. My dad use to say the more options in a vehicle the more headaches down the road only time will tell .I have gone from a 180 hp 350 to a 6.2 liter 300 hp to the 401 hp 6.6, they were equipped with a turbo 400 3 speed ,the first gen 700 r 4 abortion to a legit 4 speed overdrive now to the 6 speed .Had my 2004 not rotted out from under my feet I would have waited for the 10 speed however the I have found the 6 sp smooth when it shifts but it does seem to down shift a little too fast when slowing down to take a highway exit. When I was running my shop and constantly putting miles on the odometer I would use the local quicklube but the cash outlay for the 2023 Carhart is such that I use the selling dealer service shop for the oil changes .The trucks service history will be there if I have a warranty or out of warranty issue .GM held that fact against me when I had a brake issue on my 2004 2 months after the warranty ran.GM claimed that I was not sufficiently loyal even though the shop and family were all GM brand vehicles. As far as mileage 11-12 city my best 50 mile mark is 17.4 .I know I bought 3'4 ton truck not a Toyota Corolla so the mileage does not surprise me since 14 -16 was all I ever average with any of my trucks .

[@JB.Olsen7]

I had an 04 6.0 that consumed oil like crazy. Considering this or the 7.3 brand new. I plan to change the oil and filter every 3k miles.

[@dylanluhowy]

I’m planning to run some CRC intake valve cleaner through, at every oil change. Not sure if it will help all that much with carbon buildup but it can’t hurt.

[@TheGettyAdventures]

can't hurt forsure!

[@imageuser3]

I own one and have not noticed these issues. I bought it as a vehicle to tow my trailer. I was not aware of a break in period but did have more than 500 miles on it before towing .

[@jasondennis2356]

Really nice and fair review. I own a 2021 6.6 gasser and while your video was spot on addressing the concerns and observations by some it also reflected what a tremendous step up this is even mated to the 6 speed. It was not that long ago the Duramax itself only produced 397hp mated to a 6 speed and of course torque was much higher however for the performance and capability for those like me that pull occasional heavy loads and daily commute the remainder this truck has been everything I could ask for. Great content and thanks for sharing good technical discussions.

[@rpsmith]

I have a 2011 Yukon 2500 with a 6.0L with 245,000 miles on it and I change the oil every 3,500 to 4,000 miles and the oil level is always well above the "Add" mark and there are no oil leak anywhere under the entire truck!

[@zacharydavis6501]

I have a 2020 Ram 2500 with the 6.4 Hemi and I run 92 octane fuel and run Amsoil and change oil every 5k miles with no oil consumption and no acceleration issues! My recommendation is to change your oil every 5k miles to help extend the life of your truck and to run better quality fuel from reputable gas stations!

[@johnjoseph208]

I currently am dealing with the oil burn. I had the low oil light come on in the first 2500 miles after a recent oil change. It’s ridiculous in my opinion. You can hear there isn’t oil in the lifters on cold start. GM needs to do something about this.

[@motofunk1]

DI motors have that ping or tick noise. I think they can run so lean that some detonation is just the way it is. With the DI the difference is you get this symptom in a small range of rpm's per the situation, not like the old motors that pinged across the board when lean.

[@TheGettyAdventures]

Makes sense, I had strong suspicions that the fuel system was making these noises

[@jimsteelman7537]

I just bought a 2022 2500 in May. It had 27k miles on it. I towed my fully loaded toy hauler, approx. 14,500 lbs., to Red River, NM and on to Colorado Springs. I got a low oil warning at 1084 miles. I pulled the dipstick and it was 2 qts. low. I've been a mechanic for over 50 years, and I've never seen an engine use that much oil. The engine is great, but the oil consumption is unacceptable.

[@jimsteelman7537]

I forgot to add that I had to add another quart before I got home, so it required a total of 3 qts. for a 2200 mile trip. I'm getting ready to change the oil this week at 5k miles, so I'll see how it does in the future.

[@dallasherring1092]

​@@jimsteelman7537mine does the same thing....

[@meyou6556]

I have a 24 2500 single cab. I love her (no she has not earned a name yet). The lack of acceleration doesn't bother me. She works and I pass when I need to pass, and I'm even in Florida

[@matthewanderson9912]

Nice review. People love to hate these 2020+ GM HDs, especially the 6.6 gas versions which confirms that they are a total smash hit. You see them everywhere and real actual owners overwhelmingly love them. Anyways, my 2022 2500 LT Z71 crew cab, short bed with 20” wheels has a little over 33,000 miles now and so far it’s been so good. Zero issues (I have had the brake squeal/squeak but I hardly consider that an issue). No oil usage. I do change my oil at 3,000 miles and always get people telling me that’s a waste. My response is oil is cheap and I also don’t have an oil usage problem. Interestingly enough I probably did have over 5,000 miles on my truck before I towed my racecar. I got my truck December 14, 2021 and race season was of course over until about April or May of 2022. So I definitely had over 5,000 miles. I’d be curious to see if the carbon buildup is truly a problem. GM has been using DI engines in trucks for 10 years now. I’ve never seen a complaint with that about the half tons on any of the Facebook groups. So I’d be interested to know if it’s truly a problem. You are also 100% correct about the power. It is laughable when people say that. The 6 speed tuning and throttle position tuning in general is the culprit because when you are driving them normal, it wants to get in 6th gear as fast as possible and the computer will allow the truck to “lug” and not downshift as soon as you would think they would under light throttle. You mash the gas though and they will go. Now the 6 speed is a little limited on gearing for wanting to do 60 mph on 7% grades. 2nd is just too short (63-64 mph top speed) and 3rd is just too tall (96-97 mph top speed). The 10 speed has corrected that “problem” however. Good review though. The ping is something I haven’t really seen come up much as a complaint in the truck groups. Maybe one or two times. Oil consumption and brake squealing is a daily topic though lol. Most of the oil consumption topics are guys saying they heard they use oil and wanting to know if they truly do.

[@demsakawalkinglatetermabor7ion]

Mpg?

[@matthewanderson9912]

@@demsakawalkinglatetermabor7ion 14-15 daily driving. 30 mile round trip to work. 2 and 4 lane highways. Curvy and hilly. Speeds from 35-65 mph. 17 mpg on about a 400 mile trip. About half 70 mph interstate. 20-30 miles purely stop and go city. And the rest like my normal daily driving conditions. 8 mpg towing my 8.5’x24’ enclosed car trailer. It probably weighs 7500 pounds. The worst it’s got towing that is 7.8 and the best is 8.6. So I just call it 8. That’s on curvy 2 and 4 lanes with lots and lots of grades. When it dips below 8 is when my speeds hit 70 mph. 60-65 mph it always stays above 8.

[@bradsteelguy9140]

I doubt these trucks will make it to 100k without major problems or a transmission change. And I’ve pretty much been a Chevy guy all my life. I’ve known too many guys with tranny problems on late model trucks, not to mention when I had to replace the tranny on my 2005 Silverado at 45k and never had a trailer hooked to it. If you need a work truck buy a Ram 4500 with Cummins. They’re not perfect but I had a 2014 that always had a 40’ gooseneck on it. Put 150k on it with no major problems. Pulled 20k lbs all the time. They ride rough without a load but that’s the nature of the beast.

[@matthewanderson9912]

@@bradsteelguy9140 I think you’re entirely wrong about these trucks not making it to 100k lol. There’s examples out there already over 100k (some over 200k) but even without that the 6L90 transmission has been used in HD trucks since the 2007 model year. I’m not saying it’s perfect but it’s been around for a long time and at the time of the 2020 model year released it was GMs least warrantied transmission. Now the 2024 has the new 10L1000 Allison so we will see how it does. And there’s just nothing widespread that you can find problem wise with the 6.6 L8T engine. If there was some kind of widespread problem (like the terrible lifters in the 1500s, or the cam and lifters in the 7.3s) at this point it should have showed up. Oil consumption is by far the biggest complaint with the trucks. I have my theory on that too but there was some early 2020s that actually had in proper cylinder wall honing and some piston ring problems. Some people are saying the 2023-up use different rings now too but I don’t know about that one. I know my 2022 does not use oil but I change my oil at 3000 miles. And outside an actual cylinder wall problem or ring problem I think the 5000+ mile oil change intervals is the reason for using oil. The manual says change then at 7500. That’s too long in my opinion.

[@rdiehl7809]

I bought the same truck and love the front end.

[@jasondearduff8274]

I had 8.1 Chevrolet it burned a quart every 1000 miles. Pulled heavy stuff from Midwest to California. I decided to do a crazy test. I let I get a 1qt low. Then didn't add another qt. Guess what it never went down from there. I ran it for almost 200 thousand miles just kept it a qt low all good

[@bobover2267]

My cousin has an 8.1 w/Allison, 400K+ miles, idles ad 40 psi! Bullet-proof engine as he's not easy on anything he drives.

[@user-ym4qh2qw6z]

Have the 2023 3500 gas 6.6 with 30k miles so far with no issue, but i change the oil intervals at 40% left on the clock and i run Marvals fuel additive for upper cyl lubrication. Improves mileage also

[@chadmiller6487]

70k on mine with no issues

[@mordeth1964]

It has always been the case (as far as I've been aware) that you need to let the engine sit before checking the engine oil. Ideally, it should be checked when cold as you'll never, ever get an accurate indication. The auto on the other hand(provided there's a dipstick) should be checked when hot.

[@TheGettyAdventures]

in a perfect world yes, check the oil first thing in the morning to get a nice accurate reading.

[@Billybob50119]

It says right in the manual to wait a minimum of 30 mins before checking

[@freedomisntfree_44]

@@Billybob50119 better bring that extra jug of oil with you too 🤣

[@stanfordbanks3399]

First of all, great video, brother... I love your loop perfect 👌 I love the new trailer black box.. you are spot on most HD trucks are pulling 10000 to 15000 pounds... just keep using the black trailer because the wind makes a big difference 👌... I'm getting ready to order a 2025 HD 2500 Chevrolet ZR2 with a gas engine. The only thing I'm doing to the truck is a pro charger 8lb wheel, towing tune, air bags and 58 gallons tank. I will be pulling a Brinkley Z310 wt 14000 travel trailers.. My setup in part can be from your testing... what do you think about super charging this engine 🤔 Horsepower gain: 150+HP P-1SC-1 supercharger, 6 psi Highly effective 3 Core air-to-air intercooler Belt Drive System: Dedicated 6 Rib Fuel Pump Supplied: Not Required Fuel Injectors Supplied: Not Required Computer/Ignition Mods.: Handheld Programmer Supplied The coolest charge air temperatures and largest power gains available ProCharger’s patented and proven, self-contained oiling design requires no external oil lines Easiest and quickest installation System is 100% complete with OEM quality and appearance

[@AZ_WEDDO]

2007 chevy avalanche owner here 17 years now. This was my problem oil consumption. The bulletin said change valve cover with built in pcv value. That didnt fix it. Motor ended up failing.

[@avioncamper]

Regarding the front of the truck, it's huge. The whole truck sits up so high. It's bad when you have to crawl up on the engine to check the oil level. You must be around 5'9" . You need a ladder to access the engine bay. I'm 6'3" and would have trouble reaching in that engine compartment. A slow truck is my 1988 454 tbi Suburban w/ 3:42 axle. Terrible mpg too. but I knew that when I purchased her in 96. We have 93 octane in NC, why only 91 in Canada? Have a great week Alex.

[@TheGettyAdventures]

Haha I mean with work boots on ya 5'9 but closer to 5'8. I couldn't reach to dip stick if I tried without getting all up in the engine bay. we do have 93 up here but just not at all gas stations, you can find it everyone now and again but 91 is much more common to see.

[@screddot7074]

@@TheGettyAdventures Maybe they need to build in a step on the front so we can check the oil.

[@TylerRivera635]

Had one of these right off the truck misfiring, it was missing it’s piston rings on one cylinder…

[@jeffreygoss8109]

There’s some quality control 😂

[@markalford5406]

My truck does consume about a quart of oil every 2500 miles, I tow a lot and use my truck. So I check my oil before long trips and change my oil every 5k miles. I also added a catch can and at about 5k miles I empty about 3 oz of oil stuff out of the can hopefully it will help retard the intake valve carbon issues down the line.

[@haddockracing2589]

We do maintenance on a fleet these in cutaway school buses & that metallic pinging noise we found was the torque converter bolts backing out a couple threads & making contact inside bell housing. But could be something else that others are experiencing. As well as loose U bolts & a few other things. Haha

[@gmatthewpaul]

Knock on wood I love my 2022 2500 HD Gasser! Had a Tacoma and old 6.0 motor that was bullet proof.. new truck has 30 k miles and just did 1600 mile trip through mountains and average 16mpg with 37x12.50x 20 tires and leveling kit… my Tacoma had 32 inch tires and got worse gas mileage on same trip and not as comfortable?

[@CortJohnson]

Van has about 7500 miles. Towing about 6k for 1500 miles. Mostly staying at quite low rpm’s - 1600-2500 and oil temp has been low, low, low.

[@JackDrenalin]

GM should change the interval algorithm for oil changes so 5k becomes the benchmark for oil changes.

[@Douchebigelow7368]

My 2020 6.6 60k miles has used 3qts every 5k miles since New. Has also had the lifter/injector tick since new as well. It pulls great get 16 empty 10.5 loaded 4.10 gears.

[@cousinstu]

So, you still have the 6.4l Ram 2500? If you were buying today, would you buy the GM 6.6l, the hemi, or even the Ford F250 godzilla? Reliability being the #1 priority.

[@Pantelifts10]

I was really looking into this for a second work truck but burning oil from new its a big no for me especially since i tow weekly for work. I'd look into other options or keep my V8 Tundra. Just wish it had more payload

[@TheGettyAdventures]

they are honestly solid engines but unfortunately it seems some tend to burn oil. it does seem like GM has changed up the oil control piston ring so hopefully moving forward this issue will be solved.

[@Back_door_bandit_98]

The burning oil issue is on the 2020-2022 6.6 gas not all of them have the issue some do but after 2022 the issue got resolved and people in 2023 and 2024 models are not experiencing this issue it’s kinda crazy that the creator of this video can’t do basic research on the oil consumption issue. I would link to the GM forums but KZbin doesn’t like links. Ram has cylinder deactivation on their 6.4 which is junk and fords 7.3 v8 are having lifter delaminate at 40-60k miles with 6 pounds of oil pressure at idle I don’t see this guy jumping ford or rams ace considering all manufacturers have their issues.

[@useritscarrot]

I bet your tundra burns oil too. Mine did. I had a 4L and the 5.7l. They all have low tension piston rings for better fuel economy now. Which allows more oil into the combustion chamber.

[@thunderhorse689]

I got rid of my trusty old 2010 double cab Tundra and picked up a 2024 Sierra 3500 with this 6.6L gas engine. I do miss my Tundra-it had about 124k on it and never gave me any issues. Like you, I needed more payload, however, which is why I got the Sierra. I haven't experienced any oil consumption issues yet (only about 4500 miles on it now) or any weird noises, and it drives so smooth with the 10-speed. If Toyota had HD trucks I'd probably have stuck with them (except the current-gen Tundras are pretty hideous), but so far so good with this GM L8T.

[@hammer300rum8]

Oil consuption? Have you ever owned a dodge hemmi. Yaa i did. Fill the oil check the gas

[@lancelamoon6743]

My Ford 6.2 doesn’t burn a drop between oil changes and I tow something just about every mile on it. I do use Amsoil from day one and change at 5,000 miles.

[@edwardpate6128]

The SAE has stated for at least 40+ years that oil consumption of 1qt per 1000 miles is acceptable. That is where the manufacturers get that number from.

[@TheGettyAdventures]

Ya I think every manufacture states that as "acceptable" which is crazy.

[@bbaaspencer1]

My brother just sold his 2006 Chevrolet 2500 with a 6.6l engine and had zero issues with his engine. Actually, the best thing about that truck.

[@jeffreygoss8109]

I thought this was a new engine

[@ada-yw1bb]

It is, wasn't available in 2006

[@TheRobertVD]

BG Products Platinum service, EPR and MOA - huge for oil consumption and service maintenance on the carbon build up - Most GM stores have the induction cleaning now

[@KoliaMtl]

Love the videos Alex. I'd like to hear your comments on Gas vs Diesel for a weekend warrior truck. Which fuel type takes being driven on weekends or even left parked for weeks at a time?

[@Tmat_4928]

I’m going to swap one into my 17 regular cab. Doing a cam and heads etc as well

[@johnmackenzie5136]

I have a 2023 2500 HD with the 6.6 and my truck has excellent power and acceleration. As good or better than my 6.0 Powerstroke.

[@kevinsmith4853]

Ive got a 2024 and it gets up and goes has the Allison 11speed combo just doesnt like to go slow speeds like a traffic crawl seems like the pump does some funny things.

[@lyleswavel320]

If you have a gm or ford gas truck that can't get 300,000 to 400,000 miles you probably got a bad one, or your not maintenancing it properly

[@chadmiller6487]

Actually!? If you're being serious then it's an impressive statement.

[@InuranusBrokoff]

​@@chadmiller6487Hes very serious, that's average. I've seen some get well over 600,000.

[@chadmiller6487]

@@InuranusBrokoff a gas engine?

[@thankyou9085]

@@chadmiller6487gassers are way more simpler than modern diesels by a lot, one expected more reliability

[@dallasherring1092]

I drive a 2021 2500 HD 6.6L Gas as a fleet vehicle. The PM schedule calls for 5K oil change intervals. At around 4k, it pings an "Engine oil low, please check Oil level" code/ message. Sure enough, dipstick is very scant, or dry. I've never seen an engine do this. Got a 5.3L in a 2004 Z71, NEVER has it needed any oil between changes, and it has 168K on it. Quite a hassle, since Chevy decided most people driving these trucks will be a minimum height of 6'9" tall, apparently. Hey engineers, would a 25.00 engine oil filler neck be too much to ask? I really dislike dumping 2 quarts of oil all over the manifold, after descending into Silverado cavern....

[@bloodbushcraft2467]

No body at the dealership ever mentions the break in period. It should also be the first page in the owners Manual

[@dougburris2066]

we have two company 22 model work truck gassers, and they both drink oil.

[@TheGettyAdventures]

how much oil we talking here?

[@Douchebigelow7368]

​@TheGettyAdventures my 2020 6.6 has used 3qts every 5k since new.

[@jordanmarvin1085]

The "knocking" he's talking about is really just valvetrain noise or "chatter". Seems to be common on all of the newer v8s especially the larger ones

[@SnickasBah]

I agree! I don't like these front ends either. Hood unnecessarily high - ridiculously gaudy.

[@bobwilson758]

Probably the best thing you said was : no engine is perfect . 400 / 6.6 is another good GM engine . I really enjoy my ‘20 5.3 V-8 Silverado 4X4 Only 6,000 miles so far , and fun ! Keep it close to new …. Enjoy ‘em guys ! That is the whole point -

[@yxz91]

The metallic knocking is someone tapping the bumper with a wrench.

[@rahulrane1658]

After viewing this likely the 6th time in over 3 months, I am heavily inclined towards buying this truck

[@FTWworlddomination]

currently in the market for a HD Gas truck Dont really need a diesel and dont want to pay diesel prices. im stuck on brand as I have owned all 3 but mainly always had rams loved my 5.7s but tired of the ticking and trans issues.

[@chriscollins5762]

Please do a throwback video on the 6.0. Or a comparison of the 6.6 vs 6.0

[@derekvargason]

Mine burns about 2 quarts between oil changes, this has been the same since it was brand new weather I’m working it’s hard pulling 8k-14k or just driving around town

[@gregl5677]

I'm wondering if the engine knock/ping sound. The valves are carbon building up. Causing less flow. GM and others get away with higher comp with lower octane because of the cam profile lowering the dynamic compression. Well carbon builds up you lose bleed off on the dynamic compression ratio. They lower the dynamic ratio and if it can't move the air to bleed off on the compression stroke then you raise dynamic and boom ping noise.. Like my engine gen 1 SBC isky custom grinded the cam to be able to run pump gas. But it's 11.3:1 compression. It has a lot of exhaust bleed off to maintain street ability. If I ran a regular like .580/.580 290 lift cam I'd have to run race gas or equivalent. But isky has the exhaust at .590 lift, and .580 lift intake. Exhaust duration .300, and intake .282. effectively allowing bleed off but maintain good vacuum to run power brakes, cruise thousands of miles and get the performance to run deep into the 6s n.a. and 5s on spray. On pump gas. I could get more if I switched to race gas and made a more even cam profile but i wanted it to be a drag and drive car.

[@apkn1955]

I was interested because I'm considering a 2500 express van with the 6.6.

[@screddot7074]

Had a 402 that had a carbon buildup problem. Fortunately the interstate was nearby and you just had to blow it out from time to time.

[@TheGettyAdventures]

The old Italian tune up

[@kylebutler7142]

@@TheGettyAdventures used to work on old carburetor models but with DI...the old Italian tune up will probs just make it worse

[@Xxx-xl2cz]

04 I bought chevy 2500 w 8.1 brand new. Did EVERYTHING by the book to break in. From brand new it knocked on start up then after warming up it stopped. Also from new it used oil. I changed my oil every 3k miles. Until the day I sold at 170k it used 1 qt every 1,000 miles. More if I towed. Regarding the knocking noise I researched the heck out of it and found at a point in time gm when building their engines had a min. And max tolerances on the cylinder size. They also had this regarding their pistons. The reason of the noise was when you had a piston on low end of tolerance and the cylinder on the high end. Which produced what they called PISTON SLAP... I complained of oil consumption and noise basically from new. GM told me it was normal. I call bs.

[@sltinc]

Good information, thanks for the video. I was always taught that the proper way to break in the engine is under a load to seat the oil rings properly. Is that not the case anymore? I'm shopping for a new pickup now, trying to decide on the 7.3 Ford or the 6.6 gasser.

[@TheGettyAdventures]

Yes and no, I would slowly work the engine in for the first 300-400 miles. after that I would start to load up the engine. let the engine run completely through the RPM band all the way to redline and after 500-600 miles I'd feel confident towing without hurting the engine. But each manufacturer will have a general break in procedure.

[@Dbulkss]

i am looking at this truck in 2020 with 113,153 miles on it. is that too much miles?? should i buy it?

[@GrandPitoVic]

Fuel knock seems to be more of an issue then people think. I have a 2018 Kia Soul 2.0L. It has 11.5 compression. It says you can run 87. Yea right. It sounds like a diesel if you do. I run 89 octane and she runs great. These high compression engine like higher octane. 89 or higher.

[@jarrodmorby4516]

I have a 2020 GMC HD with the 6.6 gas 118k. Bought it new. Stupid noisy since 90k. Tried high octane fuel, seafoam in the oil, nothing quiets the noise.

[@jarrodmorby4516]

Not to mention the transmission downshift would have you eating the steering wheel when pulling up to a stop. Good news is that stopped at 80k and been smooth since.

[@CortJohnson]

I have the 6.6 in a van. Lots of power, good mpg- only issue is a kind of sloppy idle.

[@TheGettyAdventures]

these engines do have a good punch to them

[@belagaspar929]

In your professional opinion, which 3500 truck (gas engine) is best to buy in 2024? I need a long bed 3500 gas truck. Give me your best advice. Thanks ahead of time.

[@jeffstevens664]

I love the front end on this truck. Almost a little retro looking

[@jeffstevens664]

When you do a oil change use crc valve clear and you won't get that carbon build up. It is one more step but worth it. I service my own truck so I put a better oil filter and better oil in it to. Just don't cheap out on maintenance . Will pay off in future.

[@LindsayPeters987]

Another great video with the perfect amount of information:)

[@TheGettyAdventures]

Glad you think so!

[@jimellisGF_Exotics]

I live my front end. This is a love it or hate it front end for sure haven't see any in-between.

[@derykcampbell8508]

You mention , 500 mile break in period. New to this, could you be more specific on how this is done. Thx

[@Thezwang6]

At the risk of starting a war, I get a question about 2500 gassers. As someone who works on these pretty consistently, which would you recommend long term gasser ownership? Fords 6.2, fords 7.3, the 6.4 Hemi, or Chevys 6.6? I won’t be doing much if any towing, but am planning on plowing. I don’t think the half ton would get the job done suspension wise long term, that’s why I’m looking at something bigger but don’t want the maintenance cost of a diesel. Any thoughts?

[@christopherjohnboyvenable2238]

High engine oil temperature is a huge thing with these trucks and it's normally always dumbass not using the right oil. I'd have an aftermarket oil cooler possibly too.

[@chrisc5574]

What do you recommend for preventing the carbon build up?

[@danielchristian5541]

I think they're the best lookin truck Chevy has made. They look tough

[@jza80king]

What are your thoughts on doing a treatment of Seafoam, BG44K, or Lucas oil fuel treatment for carbon buildup? Or installing a catch can?

[@TheGettyAdventures]

catch can would certainly help. I think the seafoam and other products could certainly help but usually the carbon is hard to take off without actually getting in there.

[@mkat740]

just like my 6.2 suburban u have to put in 91 top tier and a bottle of injector cleaner now and then. also I clean the throttle body now and then.

[@sprint2648]

I would be afraid of carbon buildup with the DI. Wouldn’t want to own one if I had to idle my truck much.

[@TheGettyAdventures]

agreed Idling causes huge carbon build up

[@mx5811]

Would using Shells 91 octane Nitro+ help with the carbon build up? Or using fuel additives?

[@vr4787]

Gives new meaning to the term oil burner 🫠