2020 GMC AT4 HD 36,000 Mile Review: Thank Goodness for a Warranty

[@liebherrl2599]

I've got a 2020 3500 AT4 and the transmission is leaking... 9,000 miles!! I called my local dealer on 4/19 and they said they can't get it in until May 10th. I took it to another dealership on 4/23 and they said," yea the transmission is leaking but we don't have any loaner vehicles and it will take at least 2-3 days to tear it apart and diagnose where the leak is." They also said that parts availability is scarce and it took them 35 days to get a marker light! Also at 8,000 miles I got a check engine light and had a bad NOx sensor. What great QUALITY and service GM!!

[@markkalkwarf4520]

You have to be crazy to pay these prices for this kinda of junk.

[@ssok4133]

No big complaints, other than an entire transmission replacement and new injectors, and a back window that was fixed with what looks like roof tar, but no complaints.....lol....uh....ok. That's a looooow bar

[@chris1451]

That is typical of gm (God's mistake) owners. They are so brand loyal that they overlook how crappy they are.

[@4wdiesels]

I was once a GM truck owner in denial. I seemed to always look for excuses for my satisfaction with my truck although it was falling apart early in it's life. The 2004s had super cheap & cheesy interiors, steering clunks & noises...oh and gauge clusters that went out way to often. Eventually I bought a Toyota and now am on my 2nd Ram and have never been back to GM.

[@higherlifts420]

@@4wdiesels bold statement to admit you like Ram. Yikes that's the worst of them all

[@georgemorales4264]

@@higherlifts420 From yoda to ram, yea I didn’t get it either.

[@musicaccount8349]

@@4wdiesels This has got to be the worst brand transition I've ever read. Toyota's trucks are reliable through and through but a Ram? You shot yourself twice in the foot, and that second shot will cost you more than the first.

[@andrewbrack77]

For people who have never worked at a dealership service department, and be very thankful you didn't. These things happen to any brand. I have replaced engines, transmissions, Entire wire harnesses, and anything you can think of on vehicles with less then 500 miles on them. They produce thousands of vehicles everyday with tens of thousands of parts in them. Shit is bound to f up every now and then. Still sucks when it happens to you but never the less it happenes

[@jordangarrick703]

That's an interesting take from an industry insider....so - based on your experience, is it better for a guy to buy a brand new rig with the full factory warranty, or one that's 2-3 years old with limited warranty remaining? 🤔

[@ryanm5626]

I would agree this does happen to every brand, but some brands have it happen more often.

[@jason4663]

Man. People have really low expectations for new vehicles these days.

[@supanami2603]

Ikr, this truck looks like shit, imo

[@J0k3rl]

Manufacturers are in a never ending race with competitors to make the best vehicle. So yes, nowadays if all you need is a new trans and a fuel injectors swap you came out pretty good. I payed for the extra warranty myself to cover the trans in my ram when it blows. Trucks are like Sig Sauer handguns, they make a great product after the public trial testing is done.

[@Dlust88]

Ive noticed the american truck guys have low standards. I have a 21 lt trailboss with a 6.2, coming from a 07 ridgeline and a 17 tundra, chevy is junk

[@IndependenceIron]

Its great for him that those issues happened under warranty, but obviously not thinking about the "what if" scenario of those issues on vacation 100s of miles away from home with a large camper. You could be talking a week or two stuck far from home.

[@xxllbb55]

LEXUS !

[@colbysmith1398]

Man, I would not be happy if a dealer did a repair like that to the back window on such an expensive truck. Yikes.

[@Denali_Rebel]

I would be livid

[@pughconsulting]

I would have looked at that and said, so when are you going to fix it?

[@TheCamaro5]

They are suppose to take it off and reseal it. His dealer service is lazy.

[@ericsade5961]

Yeah I don't see how he accepted that repair

[@JMASON-qy7ki]

Yeah I'll stick with my 02 tahoe (300k on the 5.3 before I swapped in a 6.0. My 2006 silverado has 540K and no signs of slowing down anytime soon.

[@shawnmorang5718]

Did you have to put a 6.0 ecm in it or tune yours? The reason I'm asking is because I want to put a 6.0 in mine.

[@JMASON-qy7ki]

@@shawnmorang5718 its has the stock 5.3 ecu tuned for the 6.0.. Mine would idle fine on the 5.3 tune but it would stall after the engine had warmed up and stopped adjusting the fuel in open loop

[@archeryonly5629]

Couldnt agree more man, love my o2 hd

[@teaguegearhart9851]

Love the bronze ridge grapplers. Can’t believe 36000 miles came so quick.

[@SurlyMike]

I have zero faith in my local GM dealer's ability to diagnose or repair any issues with my late model Impala. They couldn't even be bothered to check fluid levels during my oil changes. When my transmission started shifting a little weird they had it for 5 days trying to figure it out until they were told by GM to check the fluid level and was 3 quarts low. I guess that's a little on me but I was taking it to them religiously for service. Thanks PowerNation! This was at 35k miles and they never even filled my wiper fluid or suggested a cabin air filter or air filter.

[@kevinbossick8374]

Same here. They told me I needed a new radio cause it keep reseting at vehicle start up. Told them I thought it was a power issue. Took it to the place that did oil change and battery. Turns out it was a slightly loose terminal. Fixed for free.

[@lukula2934]

This is a problem that's only going to get worse...I don't send back a poorly cooked steak to be redone, I don't rely on a tech who's been trained to just look at the scanner screen...I don't rely on a doctor who is busy typing while explaining your pain management...There are good mechanics out there, and some may have chosen the security and relative comfort of working at a dealership...But you'll never get to meet them and hear what they have to say about anything. If you have a vehicle you like, hold on to it and learn what you can to maintain it then find a good mechanic for the big stuff. In the end these vehicles are the second largest investments you'll make...And if you look at just the numbers they may even be costing more than your house... just sayin....

[@kmonto1971]

Mine went in for squeaky brakes three times, even though there are at least two tsbs on it - the GM dealership told me that they are working as designed. The leaky window was again, working as designed. The front shocks went out, so I replaced them all with bilstein 5100s. The towing issues with the various electrical issues are "working as designed, or can't reproduce the problem". I love towing 9k without electric brakes. I have ZERO faith in GM dealerships, as I have taken this truck to THREE separate ones. The techs don't seem to know what they are doing. Heads up, the techs at the GM Dealerships still can't figure out that there are 9 fittings that they ARE SUPPOSED to put grease in them. Even after they told me they did, over and over again, guess what - they were all bone dry.

[@wallfly0131]

Should have used some Flex Seal on that back window. You can make a chicken wire boat with that stuff! 🤣

[@LawrenceTolman]

heck yeah!

[@jasonjackson329]

@@LawrenceTolman does the AT4 have the CP4 ? Hopefully not. Lol if so are you going to swap it with the CP3?

[@wipatriot510]

@@jasonjackson329, No, the L5P doesn't use the Bosch CP4... "The Injection Pump chosen for the L5P is Denso’s HP4" dieselresource.com/diesel-resources/l5p-duramax-specs/

[@cvo.j7893]

I used flex seal to fix my window leak lmao

[@richardcam8870]

@@jasonjackson329 mine did the same thing, trans oil changed at 38 shifted hard from I kept the filter ( loaded with trash) transmission locked up down town 53,8 . They stood behind put in a new one. Deft tank problem is next. 3800. is what I remember seeing. Should have bought a dodge!

[@fasteddie31003]

Thank god I for an nv4500 transmission in my Ram 2500. Replaced it at 300,000 with a rebuilt one for $1500.

[@mmholling87]

Machines will break. I've owned Fords, GM, and Dodges (Ram) and no brand was 100% reliable. There were things that I liked and disliked about each of them.

[@atl3630]

That was the most bland and meaningless thing I’ve read today

[@mmholling87]

@@atl3630 you must not have much experience with machines because if you own them long enough they will break.

[@georgemorales4264]

@@atl3630 you really have no experience. Mark is completely correct, and most definitely not meaningless. As Mark said no matter the brand they will break. Is this GMC something I’d buy no, but the Same thing would’ve happened or maybe different parts. I still remember Ford killing people with their factory Firestone tires on the explorers. Every company is growing and since these machines are designed by humans, they will never be perfect.

[@rolandolozano5435]

Toyota joins conversion and begs to differ

[@mmholling87]

@@rolandolozano5435 Toyota doesn't make a HD truck so I'm not sure what your point is.

[@recontrailerltd.7838]

I have 78000km on my 2020 at4 3500. I tow trailers anywhere from 2000lbs to 24000lbs frequently. Extremely happy with mine. I love the way it looks and operates. Thinking about getting extended warranty, after watching this, it might be a good idea.

[@derekwilliamson7024]

It's Murphy's law. My 2017 Ram got a flywheel and pressure plate at 15k without pulling one load and the truck was a total fiasco until I got rid of it a 30k. Stuff just happens. I have the same truck as you now with 60k with no issues so far.

[@jerryrounds8586]

GM should have never stopped installing the Allison Trans. I owned 2 GMC 1500 trucks and both had bad intermediate steering shafts. Good luck with your truck.

[@jw7037]

And they 99-06 chevys I still say is the best truck ever made...all vehicles need work

[@terrencejones9817]

Technically "Allison " were always GM transmissions. Allison for decades was just a division of GM. The engineers were shared with GMs hydrmatic division..The new 10 speed was good enough for Allison to put their name on it.

[@russellrobins5320]

The intermediate shaft fix is easy. To keep the crash feature AND eliminate the clunk, simply cut a cedar shingle to 1” width and drive it into the slip joint.

[@DirtE30]

I think I’d want what the warranty covers and for how long in writing... “I think...” means nothing. I’d be scared of that thing long term... way too much wear issues at 36k miles man. Crazy.

[@charliemagoo7943]

It's in the owners manual. In writing

[@karlschauff7989]

It's a totally new powertrain. And a complicated powertrain at that. By now people should realize that buying a truck with a powertrain that's totally new, it's going to have these problems. Even Toyota has had major problems when they redesign powertrains or truck platforms.

[@EricB90]

Imagine your $80,000+ "Heavy Duty" truck breaking before 40k miles...

[@cesare8020]

Happens more than you think. Especially with new to market stuff. Sucks for the consumer but its the way of life.

[@gmcsierra4889]

@@cesare8020 I’m sure it wouldn’t be “the way of life” if people would stop buying these “Merica” yee yee shit quality control trucks I will be taking my own advice and buying a Toyota Tundra something that works correctly and is reliable and also that doesn’t devalue in the blink of an eye. After owning a Sierra myself It will be my last one.

[@cesare8020]

@@gmcsierra4889 they may have problems, cant deny that. However think about how many are produced vs. How many have a problem. Also, like a redesign of something, there are bugs that have to be worked out. Plus think about this. You have a bad experience. You tell everyone. You have a good experience, you tell a couple of people. The old adage the few ruin it for the many.

[@gmcsierra4889]

@@cesare8020 I get what you’re saying about how many are produced vs how many have a problem but buying Ford, Ram and specially GM now days is like buying the lottery scratch ticket with the lowest winning odds. Regarding what you said about complaints spreading faster then good reviews if that’s the case why do so many people have so many greet things to say about Tundras and why do so little people have anything bad to say? They have the best resale value for a reason cause they’re made well, Its the only truck known to last up to 1,000,000 miles and is the most reliable truck you can buy. They might not get the best gas mileage or have the most towing capacity but if reliability is what someone is looking for a Tundra is King.

[@BBBILLY86]

why I parted ways with GM products in 2018. Endless MAJOR failures at low mileage in unexceptable. 30 years of loyalty or stupidity had to come to an end before they took me down with them.

[@panagiotisf7228]

My tacoma diff failed its a 2020

[@semiauto3148]

@@panagiotisf7228 wow. Don’t hear that much... was you abusing it ? Lol

[@panagiotisf7228]

@@semiauto3148 basic snow driving in nyc and light dirt road driving no major offroad abuse

[@scotts.4413]

Me too. Had a 2017 GMC Canyon with only 22,000 miles on it when the transmission failed. I loved that truck up until then. I never drove it hard or towed anything other than a kayak trailer occasionally. . Very disappointing.

[@semiauto3148]

@@panagiotisf7228 yeah. That’s not good. But like I said. You just don’t hear that much. Did they repair it ?

[@ronfrance4041]

The truck I drive at work is a rental due to Covid, 2020 Chevy 2500hd crew cab duramax fully loaded. I’ve been driving it for almost a year, heavy use of the skinny pedal, hauled 3,000lbs in the bed numerous times, heavy throttle in 4wd in 2 feet of snow, pulled 30,000lb trucks outta mud, only 12k miles so far but for all the carpet time that skinny pedal sees this truck has has zero issues and or performance/drive ability decreases. I guess I’ll see how it is at 35,000 miles haha

[@xiong2moua]

I bought the chevy 2500HD LTZ Z71. I have 26,000 miles on it now. So far, I only took it in for noise from the steering wheel. I hope I won't start having the issues in the near future. Thanks for putting together this information.

[@thecableguy1128]

@xiong2moua I have a 2021 hd and I’m having issues with the steering. I have a clunking issue while turning left. I feel it in the steering wheel. It’s like something is loose in the steering or ball joints. Have you ever had this happen to you? Thanks

[@_360_second_gen__7]

1st time I seen a 2500 with regular mirrors lol

[@obedcasillas3404]

Had a 2019 AT4. It was in the shop 7 times in one year. Bought it Nov 18 traded it in Feb 2020.

[@obedcasillas3404]

Should be 2019 not 18 sorry

[@mikefoehr235]

What did you buy? I got a new Tundra last year. My 1988 GMC SIERRA was at the dealer 14 times for warranty work @$100/deductible.

[@obedcasillas3404]

2020 Silverado HD Diesel Highcountry. I get GM family discount

[@bubbleillusion5968]

Curious what your issues were? Transmission?

[@obedcasillas3404]

@@bubbleillusion5968 the brake system would just stop working. They replaced part after part til just about the entire system was replaced. Hood sensor. Didn't have it long enough to have transmission issues. I was driving down the highway and lost brakes. Had to coast to side of road pumping brakes. Shut truck off and power was restored to the system. I was lucky I had just read about the issue the day before.

[@divadyrdnal]

My experience with the new GM autos I have purchased is they fix things just enough to get it past their warranty period!

[@Mgtech14]

Love your content LT, hate that your having issues with the L5P I’m a gm tech done my share of injectors on them as well as sealing rear glass, we use a Kent high tech clear seam sealer. I’m shocked about the trans issue having encountered that one yet but nothing is surprising when working on cars. The bronze wheels look killer on the truck.

[@DavidJames-wz3mf]

Own a 99 k2500 454 suburban with 300kmiles.... probably the last time gm made anything that can go over 150kmiles

[@blackbuttecruizr]

My 05 HD has 260k and is still going strong 😎

[@ashfordcombs8658]

Them was great engines back then

[@chipper442]

I just sold my 2012 1500 Silverado, and bought a 2020 Silverado 1500 LT The 2012 had 248,000 and it’s still going. Dependability and reliability are only as good as the owner taking care of their vehicle.

[@311hitwall]

@@chipper442 Unless it is just bad design then I don't care how good you take of the vehicle.

[@milesff7]

Warranted is up, let’s customize it!

[@monsterram6617]

Two bad injectors and a bad transmission in 35,000 miles? Sell this thing immediately!

[@mysterysolver514]

Lb5 have injector probleme because the fuel pump makes metal flake in the fuel. Ive seen i video of a guy that a replaced the injector like 12 different times, sometimes 2 at the time and he was talking about the fuel pump going bad if i remember correctly

[@philipharris8027]

@@mysterysolver514 LB5?

[@stevetassie5479]

@@YoungOzzy432 china owns part of the company and that sucks.

[@Denali_Rebel]

The 1500 mirrors on the HD are so hideous.

[@hugieflhr03]

A very fair evaluation of the truck. I will tell you we filled the cavity where the steering shaft goes through the firewall with marine grease and the sound went away.

[@ksamos]

Scotty says GM is pretty much crap theses days. Sad. Nice truck. Wish it held up better for you.

[@bmd1825]

I’ve never understood the reasoning behind a 10 speed for a 3/4 ton truck. I know it’s all in the name of economy but, that’s too much going on. The shift points are all over the place and will have to search for the correct gear when towing, the 6-speed was a brick house.

[@bobover2267]

Yeah, both 6 speeds are great, proven tranny's. I totally agree!

[@jameslambert1609]

i was about to buy one of these things, glad i saw this vid, i'll stick with my super duty, thanks for the heads up

[@Goontrader2]

I have a 2020 at4 1500 diesel. 44,000 miles on her so far. Not a single problem. Absolutely love the truck

[@justinchain1668]

*had major failures* Gm fanboys: still a great truck!1!1!1!1!1!1!

[@x21blaze21x]

Well, we have the money for repairs so the styling is worth it to us. Just like Harley guys.

[@justinchain1668]

@@x21blaze21x lol, chuck the money down the drain for “styling” nothing more American than that

[@x21blaze21x]

@@justinchain1668 it’s only money bud.

[@Bigdawg226]

Them GM fanboys driving that truck that’s made in China and assembled in Mexico

[@Donmud]

Any other fan boy comment "GM Fan boys" who hurt you ? lol

[@uptownautogarage6833]

Keep the Videos coming! Great content. Have you looked into the 3.0L Diesel? Crazy mileage

[@jonathansparks7558]

Uptown Auto Garage are you referring to the in-line 6 in the 1500 or the little baby Duramax in the Colorado

[@uptownautogarage6833]

@@jonathansparks7558 3.0L in the 1500 Silverado

[@jonathansparks7558]

@John Doe my biggest concern with that engine is that the timing gears and the cover are all on the backside of the engine block where the transmission mates up to the block. Any related work is going to get really expensive really fast because if you go changin the camshaft you have to pull the engine completely to for said needed repairs

[@czar2321]

@John Doe the 21’ Silverado 1500 3.0L diesel isn’t every rated to tow 13000lbs. Quit lying bro 🤣

[@richspurlock24]

@Jimmy Jones & the Kool-Aide Crew Why wouldn’t you want one

[@whskythrttl]

If you had that happen already, what do you think is going to happen in the next 36,000 miles?

[@marufio]

There is always something wrong next episode

[@SD-pi9co]

Where is this perfect truck you suggest? Toyota? 😆

[@bschmitty77]

Issues happen with all makes and models, in my opinion its how the manufacturer/dealership wants to handle the issues that come up that matters. I had a 2019 F250 that at 4,000 miles had to have 2 recalls fixed AND steering dampener/tie rod bushings replaced that was causing the death wobble effect. They took care of it no questions, sadly the issue and others continued to pop up every 5 to 8,000 miles until I had had enough of it and had them buy it back at 42k miles. I now own a 2500 Duramax AT4 and compared to the ford its night and day.

[@josedominguez3155]

I bought my Silverado with 15 miles on it in March 2020. The front knocking sound started right when it reversed out of the dealer ship but never thought nothing of it. Now it has 36000 miles on it and that front knocking sound is louder but only happens when I reverse.

[@11LowDown11]

Leaky glass is almost always an assembly ‘glass cell’ issue... and if they do not leak once past the water test, it ships!

[@bonecrrusherSS]

That steering column clunk has been a problem going back to the GMT800 - my 2005 was making a noise and I ended up putting a hose clamp around column under the dash up near the firewall - and it took care of that noise.

[@fredericktaylor2891]

My 2002 Silverado Z71 had the same problem, irritating clunking noise. I replaced the intermediate shaft and it was good for about a year, then the noise came back. GM has an ungraded part # 19153614 that is suppose to be a permanent repair for the noise problem. I installed the new part 2 years ago and so far so good. The noise can also be caused by a bearing under the dash at the base of the steering column, the thing is plastic and has a tendency to fail and allow the shaft to wobble.

[@pughconsulting]

The dealer swapped all the steering parts on my 06. That was a really long time ago and I've never heard it since. Must have been the upgraded parts.

[@mmgtl]

I have a 2005 with 370,000 saw a KZbin about a clamp on the steering column and gave it a try noise free for the last 3yrs. Alot easier than replacing the shaft and plastic part. Wish I could remember the guys KZbin to give him credit.

[@steve6992]

Just a couple of things, your fuel economy probably is more due to the taller tires and not registering the correct mileage, and if you ever need to tow a enclosed trailer you're going to need to have those mirrors to see around it, you shouldn't have any problem with the mirrors that you installed towing a open trailer with a pickup truck on it

[@mrbrady98]

Thanks. It’s a beautiful truck, and I love it. But I’m buying a tundra, I cannot deal with quality issues.

[@betterdeadthanred839]

Same here...it's a damn shame...I'm in a market for a new full size truck and these videos scare the shit out of me.....and I keep gravitating towards Tundra. I don't plan on towing nothing crazy, so Tundra will be more then sufficient....and I already have current gen Tacoma so Tundra would fit in perfectly

[@damico123456]

My Tacoma had electrical problems non stop... 17kKM lol... And drained a gas tank as if there was a hole in the bottom of it🤣

[@betterdeadthanred839]

@@damico123456 I had previous generation (2nd) and it had 260K miles when I traded in for a new one, never had any issues..zero!! I bought a new one three years ago and I already put 70K miles, no issues. You might have a lemon...it happens, only difference is that with GM product thats normal....

[@SethHalstead]

I would really like to get a diesel truck, but I have a 2010 Tundra that has never had any issues at all with a little over 100k miles in 11 years. It runs perfectly, drives super smooth, no rust and looks great. I just can't see spending $80k for all these problems when my Tundra has no problems.

[@bobocaterpillar3697]

i am a 20 yr heavy equipment mechanic. i work on my own stuff. BUT the problem is, if you don't have the dealer computer - or something similar, your STUCK! wife has a 2015 acadia. with 67k miles. 3 MONTHS outside of the 5yr/100k powertrain warranty, i get a torque slippage code. the torque was not slipping, the car ran fine. but my wife needs the car everyday, so i gotta fix it.... took it to gm, they said put new trans in it, $5k!!! i asked the dealer what they did to test it, they said their seen a couple of metal shavings in the oil - bullshit- i changed the oil the week prior - there was no metal in it, the fluid looked brand new! - i spent the next WEEK on the phone with GM - not the dealer- to figure out what they could / would do. the best thing they came up with was to let the dealership remove and disassemble the trans to determine the problem, and IF they found a defect, they would THEN determine how much of the bill they would cover. FFFFFFFFFFFFFFFuck YOU!!! i got a reman trans from street smart transmssions.com for $2k shipped to door. i put it in myself, runs great! GM sure HATES its customers!!! get all the warranty you can, and prepare yourself for a fight if you EVER plan to use it! edit: after i put the reman trans in, i had to flatbed the car to a dealership to have them program it. $120 NO WAY AROUND THAT! so they got $120, hell of a lot less than $5k!!! 🤮🤮🤮🤮

[@conkilla187]

The rear window leak..GM has a bulletin that tells us to attempt to reseal it with seam sealer first. I noticed that never really works but we are required to do it, if it still leaks replace the rear glass. I have a 2021 trailboss and I am keeping an eye on it everytime it rains or I wash it.

[@loganclunan1110]

Don't pressure wash the bk glass my 2008 and 2017 both will leak if I get close to the seals with pressure it sucks

[@brandonburgoon8649]

I have the 1500 with the Duramax - it simply the best truck on the road. Not a single problem with mine. 37,000 miles on it

[@davidgodoy1943]

35,000 miles and your transmission goes, reveals how cheap GM has gotten it's sad. I own 2007 Silverado with 145,000 miles runs strong. No engine or transmission problems

[@fredp3088]

Yep 2006 178k before selling it no engine trans issues "upgraded" to a 2017 transmission went out at 30k miles

[@miket2172]

I got 200k on a 6l80 with a 5.3 been using for work since new pull 7-8k trailer 5 days a week its a 2011 got 250k out of my 8.1 2001 suburban and towed 10-15k trailers since new with that

[@Kben01]

5 year 100k powertrain. Glad to see they went back to that.

[@LawrenceTolman]

its come in handy for sure

[@2000blackstang]

That's sad it had those major issues already. I'd trade it in for something else. Can't trust it now that the warranty is up

[@jeffpuro1040]

It's not just sad, but a disgrace regarding how these trucks are being designed.

[@fuelinjectedduck2964]

Love GM, buy I'll pass on their new stuff.

[@Upracefan]

Mileage calculation with the larger tires will be inaccurate unless you have a way to recalibrate the speedometer. 2 mpg is about the amount that it would be off if the speedometer was not recalibrated.

[@LawrenceTolman]

the ridge grapplers are only 5/8" taller than the stock tires, and according to the GPS they speedometer is still correct... but the new tires do weigh 20lbs more per corner and have a much wider and more agressive tread pattern.

[@J0k3rl]

Would it kill the manufacturers to make a trans that doesn't need replacing after 50k miles?

[@stevetassie5479]

Right!! I thought Allison was a good trans but nope.

[@paullane7489]

@@stevetassie5479 Allison doesn’t actually make the new heavy duty 10 speed behind the L5P Duramax . I am not sure how involved they were, if at all, in the design. It was co-designed by Ford and GM, just like the lighter duty 10 speed in the F150, mustang, Camaro and some GM half ton trucks. I think the detailed literature from GM says the new heavy duty 10 speed is “Allison approved or Allison endorsed” or something like that. I have a 2021 F250 Powerstroke with the Ford version of the trans called the 10R140 and I love it. But Ford has had some problems with their version as well. I had a 2019 Ram 3500 Cummins with the Aisin which was my 5th Cummins truck. I loved Cummins and the Ram, but I had terrible experience with the Aisin. It didn’t break on me but it shifted like a 1980’s school bus. It made the truck very slow because it shifted so slow. It also shifted erratically and would jerk, lurch and seemed to get stuck between 1st and 2nd gear at slow speeds in parking lots. Anyway, all three brands, Ford, GM and Ram, have some issues unfortunately these days.

[@blackbuttecruizr]

Great info! I have an 05 Duramax with 260k on it, no leaks, runs like a top and pulls great. I've heard a lot of horror stories about the LLY, so far mine appears to be a gem.

[@2015_Rubicnn]

I love my LLY too, runs great. I did a few mods, but no issues.😎

[@rogerdevries8883]

Those trucks were the peak of Chevy/gm, keep it alive for as long as you can!

[@jordangarrick703]

I'm a GMC owner and enthusiast (daily driver is a '97 2500 4WD with a 5.7 350. 260,000 miles and never had any "major" mechanical issues. Original transmission and transfer case). But these newer diesels are high-end junk. I've lost track of how many people I know with injector and transmission problems. Absolutely inexcusable for trucks that run $90k. The Powerstroke has long been the fools-gold standard for diesel problems, but GMC/Chevy is quickly catching up. I can understand someone buying a new gasser from GM, but not the diesel. Hard to believe anybody trusts those things....👎

[@philipharris8027]

I have a 2015 GMC crew 4c4 with the LML with the Allison which was deleted with added lift pump with on 60,000 trouble free miles on the odometer I’ll be keeping it for a long time looks like.

[@Osiris94ej1]

Steering noise is the intermediate steering shaft. Temporary fix.

[@darthmaul7428]

Best looking gm HD truck IMO.

[@Dennis-sq2nm]

When the title includes thank goodness for the warranty, kinda discredits the truck. Lol

[@paullawrence1450]

You said NO COMPLAINTS OVERALL? what a nice guy!

[@acmanwwjd1]

Check your shocks I’ve had those same shocks on a Dodge and my 2016 both of them under 30,000 miles the shocks were shot went with BillSteen‘s

[@rockerbob949]

I have a GMC Canyon with 10,000 miles…..at the dealership already

[@BlàckÐèàth]

Its a crying shame to have some of those more serious issues on a vehicle that costs 60 to 80k new and to only have a 36k mile warranty no thanks?

[@LawrenceTolman]

to be fair, the engine and drivetrain are covered to 100k, but yeah, its kinda frustrating

[@pjk4943]

Good Review!!....folks are always commenting on how gm/chevy is behind with the HD 6 speed tranny, but this is why I got the Gasser 6.6 with the 6 speed. The gm/ford 8 speeds and 10 speeds are not proven enough. I realise this is somewhat anecdotal but I had an awesome 2017 SS Camaro with the 8 speed auto and had issues with it until I sold it and got my 2021 2500 HD Custom. (Loved that Camaro, but had the tranny flushed 3 times per GM) I Just checked reviews with contractors that need an HD truck fleet....the gas 6 speed chevy's are dependable and lower maintenance. My mileage is not that bad either when I stay out of it. (17-18 hwy @ 70mph) Enjoyed your honesty on the video!

[@johnd7215]

That's a shame. For the price of these new trucks they should have a lifetime warranty.

[@roadrunnergtx68]

Wow! Thanks for this information. I was in the market for a Chevy 3500 SRW and wanted confirmation on the Allison. I will definitely not be buying GM on that alone.

[@jimmyford271]

I Like how General Motors is using 60 year old Chrysler suspension technology

[@frostybytes6835]

And it's still better than anything new Dodge (Chrysler) can put out lol. (Just a joke)

[@dalethomas9307]

Ackchyually Ferdinand Porsche invited the torsion bar suspension for the 365 and the 911. So GM trucks use Porsche suspension design. Doesn’t that sound better?

[@shadowopsairman1583]

@@dalethomas9307 torsion bar is 1 suspension type, the other is coil over

[@kunu98]

I rather the simplicity of a solid axles

[@V8RJIM]

I purchased a 2020 GMC Sierra 1500 last year. After all the problems I’ve had with the radio, it’s made me consider going to a Ford next go around. This is coming from a guy who owns 4 GM trucks and a GM car.

[@xiong2moua]

Ford also have their own issues. I heard the new Tundra also have issues. Quality just sucks on these new truck but the price continues to go up each year.

[@danc8919]

I don’t think any make really you go with anymore you don’t have issues. Everything is garbage, corners cut and money saved where it deff shouldn’t be on stuff that’s crucial.. My 21 Rst 6.2 has been running like a champ, I’m 8k in... But I can foresee issues though cause these new vehicles aren’t like the 02-03-04 were lol. Unfortunately. The refinement has gone way up because of technology these cars ride smoother and better then my 03 ever did. But at same time they even cheapened shit so much it brings the car down to a shitty level all the same.

[@ashfordcombs8658]

Think I’ll keep my old dodge 12v Cummins with 301,000 mile on it without any major issue other than the KDP fell out without damaging anything.

[@johncholmes643]

After owning and using all 5 major truck brands, working them, putting 100s of thousands of miles on I've came to the conclusion that GM and Dodge trucks are no longer in my horizon. I'm glad they got you taken care of man.

[@jw7037]

I belive u unless your a ecoboost fan

[@johncholmes643]

@@jw7037 My fleet has been EcoBoost for the last 3 years. WE will try the new 7.3 gasser next year. Aside from spark plugs, and and a couple hpfps no problems

[@jw7037]

@@johncholmes643 everyone I know brags on how hard thier eco boost pulls...then they put 8k on a truck that says it can pull 13k...and they come home and sell it and buy themselves a v8 of anybrand

[@manuelguzmanjr6622]

I have a 2014 GMC Sierra 5.3 stock. No problem yet. Have pulled a 30 ft travel trailer a few times. No problems yet. Was thinking of getting a truck like yours. Will do a little more studying before I make a decision later in the future. Your truck looks great. I like the stock wheels and tires. Just my taste and like the big mirrors especially for towing. Thanks for the video.

[@bigredracer7848]

257👍's up LT thanks again for taking us all along with you for a great build review

[@Johnny-vu7db]

Hmn? I wonder if swapping wheel/tire sizes back and forth messes up the trans? I mean, in the old days it didn't matter, but, the new trucks are so high tech. Maybe even a 1/2" of tire profile messes up the computer? Only saying this as I was watching another two channels, where their GMC's had the exact same transmission symptoms, and they both had swapped tire sizes a couple of times. 3% difference seems like nothing but these days we are measuring mpg to 1/10 of a gallon accuracy, so, to the computer 3% is an incredible margin of error.

[@georgemorales4264]

Very very plausible theory. The wheel act as a flywheel if you think about it. Mass is spinning around and the transmission was meant for a smaller wheel and tire package, therefore the bigger wheel or tire would alter the flywheel effect, potentially causing some compensation tolerances to be out of wack. But I’m not an engineer.

[@jcf6597]

Interesting video as I'm looking at buying either a new GM HD or Ford SD. Ford has just issued a massive recall for all 2020 SD auto trannys, I wonder if its a similar problem to what happened to yours if they share some parts? Also, I had a 2003 GM with what sounds like a similar steering column noise which was just some sort of plastic bushing issue in the column. My biggest issue with the Ford is it's ride quality hasn't changed since the model T.

[@donschutte1418]

Last fall I ate lunch every day with a guy that had a new GM pickup, every day listened to him brag what a wonderful pickup it was I said one day lets go out sat. and shoot some grouse he said ok but we have to take your truck. I said why he said I don't trust it and GM was going to buy it back go figure.

[@carlos78ram]

Ford just issued a recall for the super duty’s with 10-speed. Remove transmission and replace planetary gear set

[@stevetassie5479]

At least they recall there problems instead of covering them up like the ignition switch problem that GM had for years!

[@jeffpuro1040]

I have a 2012 Chevy Silverado with 41,000 miles on it, and no rust. It has the 5.3 V8 & 5 spd trans. It gets about 22 1/2 mpg on the road. I want something newer, but I keep hearing the "horror stories" about the newer trucks, especially the 2500 & 3500's. The newer trucks all seem to have serious issues.

[@JI-sg5uy]

As a person who drives 9000 a month for my job. I’ll stick with my Tundra. It never lets me down. Why can’t the American truck makers make good product.

[@AmazonWebService98]

9000 miles a month cute, sounds like you towing a 5th weel/gooseneck with a tundra lmao

[@JI-sg5uy]

@@AmazonWebService98 nope In the oilfield.

[@AmazonWebService98]

@@JI-sg5uy rn i do about 500 a week with a '13 silverado 1500

[@kgb5351]

Some of us Americans have to pull heavy loads that the foreigners are capable of.

[@John-ze4qy]

You have a 70k truck,and 1-2 mpg makes you sweat??

[@jasonwahl2510]

My thoughts exactly! I'd say those wheels and tires cost over $2500! That would have bought a lot of fuel!

[@williamegler8771]

My neighbor drives a $120,000.00 Range Rover and refuses to use premium fuel, which the owners manual suggests, because it is $0.60 per gallon more than regular.

[@luismendez-tu7mr]

@@williamegler8771 and I have a 2020 Corolla SE and I refused to put cheap gas in it😂 I always use premium, it give you better power and mileage and is not a big difference in price so it don’t worth put cheap gas.

[@SD-pi9co]

​​​@@jasonwahl2510 Why would anyone put fancy wheels on a truck made for off road? I could understand if it were 2wd truck. I don't buy used truck that were modified, I need reliability.

[@SD-pi9co]

​@@williamegler8771 LOL He will not be saving any money when he needs intake ports and valves walnut blasted every 40k miles.

[@davevandervelde4799]

I had a 2006 Silverado 3500 hd and when I had my Allison transmission oil changed at the prescribed mileage I drove 1/2 mile down the road and it banged in and out of gear so hard it locked up the duallys. Then it seemed ok and pulling away from a light it did it again and again. Sometimes really hard sometimes not. Went back and they flushed and replaced fluid again. The dealer drove it for 20 minutes and everything was fine. I went on a trip 5 hours away towing a trailer and it happened again . Found a local dealer who opened up the transmission and took it all apart removing a lot of solenoid valves. Showed me a sample of the fluid they removed and ran through a filter and it had lots of grit the size of sand. That caused the valves to not cycle properly when the computer in the transmission signaled it too. It took 2 days to do all that and $5000! Ran perfectly for the rest of the time I had it. The dealer was great in showing me everything they did but not covered under warranty . No one knows how it got in there but there was no issues with that truck after that.

[@markhansen4258]

I’ve got a 2021 with 44k miles. No problems yet. To me the transmission is a drag on the whole vehicle, but I still get 22 mpg. I had an Excursion that I lifted and put big tires on. I never liked it again. Destroyed highway feel. As far as the tonneau cover, I’ve had em, but whenever I have it on I want it off and vice versa. My sierra is totally stock.

[@andyking9673]

36k warranty on a diesel is an insult

[@71dbart]

Yeah, this is strange. My 2018 Duramax 2500HD has factory 100k warranty on powertrain. I added a full bumper to bumper 100k warranty at time of purchase, but the Duramax/Allison already comes standard with 100k warranty. but I'm in CA so maybe that's the difference.

[@carguy3028]

I'm curious if the people at the dealer know who they are talking to, I know it can be frustrating talking to service advisors when you know more about the car than they do. I bet you run into that more often.

[@MrBillsfishin]

With resale as high as it is right now I would be switching to Ram if Ford is using the same trans. For 70k+ you are more patient then I am.

[@joseramos7476]

No complaints on mine

[@andysullivan7226]

I bought a used 2016 1500 Denali that has 54,000, drove it for about 2 weeks off and on and started to notice the rpm while driving would jump around 100 to 200 rpm, then shortly after that the truck would start to shake like running over the very deep rumble strip on the side of the road. Took it to the dealer and they tested the trans fluid and it had moister in it, no metal. They flushed and replaced and so far so good, I've drove the truck on a long trip about 7 hour around trip and a few thousand miles and still good. Hopefully GM gets it figured out, I hear some bad things about these transmissions, funny thing is a research the truck and google didnt tell me shit about the transmission issues until after I bought.

[@lloydmarche7263]

I bought a 2019 Sierra 2500 in sept 2020. I walked past all the 20s and 21s. I was weary of the new 10 speed transmission . I am really happy with my truck so far. No issues. I traded my 2013 Cummins in . Not enough time and patience to list the problems with that lol.

[@daygowest9346]

How many miles on your sierra?

[@beastmode3600]

I know the dealer was like this guy AGAIN

[@kevinj2412]

Just in case you GM trans bashers are wondering, GM purchased Allison in 1929 and sold it in 2009 to another company I believe called the Carlysle Group. But GM retained the Allison rights so your 10 speed is just an Allison branded trans.

[@davidburkholder7360]

Nice truck. I have a 2016 1500 All Terrain. I am a bit surprised of the problems you have had with your truck which I would consider MAJOR. Transmission, injectors are VERY EXPENSIVE and so that is a concern but you seem to take it in stride. Anyway, thanks for the info and well done.

[@NavyGuy2OO7]

That's a nice truck, I like the AT4s. My personal opinion, I prefer the stock AT4 wheels over the Methods but that's just my taste. I considered a GMC 2500 with the Duramax but I ended up getting a Ram 2500 Cummins Mega Cab Laramie with the Night Edition package and overall I love it. I kinda wish Ram would have added a 8 or 10 speed trans by now but I'm averaging 16mpg in town which is a little better then the GMC 1500 5.3 I traded in and the '20 Suburban my wife drives so I'm happy with it. One thing to bear in mind with the power-train warranty, it will only cover the mechanical engine parts not the electronics, so for example if you crap another injector or an ECU it wont be covered. I ran into that on my '16 GMC 1500. I ended up getting a check engine light, they pulled the codes and said it was one or more injectors was bad, turned out it was 2. The compressive was expired but I still had the power train warranty, unfortunately they told me that it only covered the mechanical engine parts, you would think it would cover everything needed to make it drive but that's not the case. Luckily I bought an extended warranty when I got the truck and that covered it, otherwise it would have been about $700-800 out of my pocket. The power train did cover a leaking coolant line and a couple of other things they found so that was nice.

[@MatchaFather]

The 4l60e was so good in 2020 GM decided to make 4l60e Part 2.

[@JMASON-qy7ki]

😂

[@frbrbrgrblgrr7777]

Well with how the 6.2 is they figured they mine as well just commit to the shit

[@fisherholmsfly]

I changed the $$$ for the $$$$ and decided to eventually go with the $$$$$. I like the new $$ and I’m thinking of upgrading it to the $$$$$. Maybe I’ll eventually do the $$$$$$ but that will come later.

[@geo_walters]

Reminds me of numerous dealer visits back when I bought a new GM pontiac Grand am in 1994. 500 miles, 1000 miles, etc... got rid of it before it hit 36,000 miles. Makes me think GM hasn't learned how to build anything right in 30 years.

[@bobby3944]

Did they ever build anything right? Serious question. In looking back at my old Trans Am's in late 70's and early 80's, I really liked them and thought they were great even with multiple engine, fitment, and ancillary system problems. But then you buy your first Toyota or Lexus later in life and you realize how a vehicle should be. Things can be made with quality by companies who choose to do so.

[@godblessamericanbass303]

You did all that to the shocks and you said the biggest thing was mirrors lol

[@devonhoward1305]

I love the 2500 mirrors they make it look bigger

[@kevinengstrom1316]

No complaints overall 😳. Good luck to you sir.

[@panthermartin7784]

Lol never heard of anyone taking off tow mirrors on a truck designed to tow, ohh well 90% of trucks arent used for any serious work or towing anyways .

[@nickissa]

Hey LT, really enjoy your videos and the ugly truck in particular. Cheers from Detroit

[@LawrenceTolman]

thanks!

[@danieldelgado3008]

Injectors are covered under powertrain 100k miles

[@roywall8169]

That Allison was the best feature of GM trucks. Moving away from it was a mistake imo.

[@hellkitty1014]

Interestingly, your trans issues and those that the Ford guys are experiencing are exact and do occur between 30-50k miles, insanely low for an HD truck. Some are pretty mild like yours, and some experience complete valve body failure where there are only 2-3 gears available. And injector failures this early don't bode well for the remaining 6. I would've really strongly asked for them all to be replaced. Still, this is one beautiful truck man!