Bob’s Sierra

the truck has made the rattle since march my truck went into the shop in mid march and they replaced valve body , transmission control module, and the transfer case actuator and just got it back a week ago and it’s still makes this random rattle at idle

need help can’t replicate at dealer no codes use nothing but shell 93

finally got a firm update today it’s the transmission control module part must be ordered from michigan 7 to 10 day lead time

i’ve put over 25,000 on it since the lifter issue now the transmission is done , and it has sat at dealer for 3 weeks and no one has touched it since

to stay on topic the dealer has had the at4 6.2 for 15 days nothing firm on what they plan to do to fix the 10 speed transmission

almost every I can only imagine, almost every new 2022 i’ve seen in half ton has the the 3L diesel That 6.2 new engine will be a while getting to Fl

my lifters went out at 9,000 miles they replaced one bank

they are going to do a cost analysis on whether to rebuild or replace entirely

nothing to cause it I just drive it I drive about 3,000 miles a month i’ve had a 2015,2018, and 2020 this 21 has been a pos

my truck has been at the dealer since last tuesday now 8 days and they have no idea what’s wrong with it this is a dealer in tuscaloosa al they said “it could be electronical” but they don’t have a clue and they have no idea when they will no what the problem is update 4/7 now dealer says it’s in fact the transmission and it maybe the planetary gear they are taking transmission out now to see what’s broke they will then see if gm wants to rebuild or replace the 10 speed

my truck has been at the dealer since last tuesday now 8 days and they have no idea what’s wrong with it this is a dealer in tuscaloosa al they said “it could be electronical” but they don’t have a clue and they have no idea when they will no what the problem is

this truck has been a giant pos from day one bought new in january 21 in may of 21, lifters collapsed left me dead on the road dealer fixed and replaced one bank of lifters two weeks ago I was getting an awful clunk sound took to dealer and they attributed it to bad 87 octane and suspension clunk yesterday I was 200 miles from home with my two dogs in bfe and they clunk rattle was terrible the service 4wd the service engine low power mode came on limped to safe spot and called on star and they towed it to nearest dealer dealer thinks it’s the transmission 2 catastrophic failures in first 14 months the truck now has 39,000 miles needed to vent

Since this latest generation I’ve had new standard bed z71 or x31 2015 130,000 miles transmission replaced at 108,000 just out of warranty 2018 Z71 60,000 miles no issues 2020 x31 32,000 miles no issues and now this gem 2021 6.2 all others were 5.3

This best part is there are no trucks to replace my At4 it’s a standard bed which apparently over the last 7 years is frowned upon in a half ton my truck is very specifically setup for what I do everyday

Question is this issue being caused by the afm? if so if I get my truck back I’m thinking of Getting the pulse to disable afm issue : We are currently in the process of dismantling the affected side of the engine. We have had parts ordered for it. I should know more tomorrow. Lifter, push rod head bolts and gaskets

This is their latest response “ Wellllllllll. We have some back ordered parts. We are searching the country for them now. I made GM aware of the situation

Thanks for the reply

I have a 2021 6.2 at4 that I bought new in January experienced severe engine knocking yesterday took it in to dealer I bought it from and they think it maybe a stuck lifter but they don’t know for sure very very frustrating could be 7-10 days without my truck anyone seen this ?

I currently have a 2020 Sierra crew standard bed with the 24 gallon tank and loathe it. I drive roughly 40k a year ordering a 2021 at4 crew standard bed has anyone had any luck getting the 28 gallon installed in these crew cab standard bed trucks thanks

The warn Trans4mer on my 18 Sierra worked on 18 Silverado Warn has one for 19 plus Silverado they have nothing for Sierra I assume you can make it work But not look as good

2 things to look at the shape of the Sierra vs Silverado bumper the other the mount holes for the tow hooks Silverado horizontal Sierra vertical you will need to get your eyes on Silverado see instructions it may or may not working depending on those two factors http://s3.amazonaws.com/roughcountry/install/921107650.pdf

Done 295/60 r20 km3 2” rough country removed mud flap on the front only no rubbing 2020 Sierra x31

295/60 20 km3 2020 Sierra x31 2” rough country under strut level Removed mud flap , will install finishing cap no rubbing 33.9x11.8

@Scooter Scott the km3 I’m looking at are in the 70 lb range as well but I’m only planning to run them 2 months out of the year

@DanBlp I’ve been using your post as reference for my decision How are the 295/60 working for you?