Thanks, I'll look into it and suggest the dealer do the same.
All recalls done thus far...maybe something else will come out that will be the magical fix. Thanks for the suggestion, I appreciate it.
Good advice...I'm on #2 now and am good friends with a service manager at another and have been running it all through him too...he's thinking they need to send an engineer from GM to look into it. Giving the current dealer a chance to see what they come up with...I'm done with the "We reset everything it should be good now" answers.
Sorry in advance for the long winded post here, I am looking for help...and lots of it. I've got a 2019 AT4 with the 6.2l and it has been nothing but problems since I purchased it. It started early on in its life with the speedo having a mind of its own bouncing up and down when on cruise control but the truck wasn't actually changing speeds. The check engine light came on and it was brought to the dealer - cleared codes and couldn't replicate it and sent me on my way. Months later more issues - this time my low fuel light came on (had a full tank) followed by the service electronic stability control warning, a warning telling me steering assist was reduced and to drive with care along with the traction control off light and the check engine light. Brought it in to be checked and dealer said there were no codes and they could not duplicate the issue and sent me on my way. For whatever reason they wouldn't tell me why the check engine light was on. Less than two weeks later the transmission stopped shifting properly - 60mph and felt like the e brake was on, revving very high...check engine light came back on and had it towed back to the dealer. This time they found codes....A LOT OF CODES...they said a number of the modules were not talking to the ECM. They reset all of them, test drove it and said it was fine. The next morning they fired it up and it duplicated...the check engine light was back on with a number of different modules not communicating with the ECM. They were completely unsure what to do and called GM's tech line and they provided them an update for the ECM saying they didn't think it would fix it but it was worth a shot. They kept the truck a few more days, couldn't duplicate it again and returned it to me. Two weeks later (November 28) driving up the highway and the fuel light error comes back on along with all the steering and traction warnings. This time I also got trailer connection errors (but I wasn't towing a trailer). The check engine light came on but when I got to my destination all the lights turned off and it seemed ok again. Fast forward to today and as you may have guessed, driving up the highway and more issues. This time it was everything at once...every light I've seen and haven't seen on the dash, traction and steering warnings, reduced power, throttle wouldn't work...I limped it to the side of the highway and it died. Wouldn't start but everything electrically seemed to have power. Had it towed back to the dealer...and there it sits. I've attached a photo of today...it shows some of the lights that were on but not all...it kept resetting itself and new lights came on and off, it was very strange. Has anyone seen ANY of these similar issues and had any success working through them? I know its a lot...it really sucks. The first new truck in my life...my dream truck and it's been nothing but a problem. 16,000 miles, only 93 octane fuel as recommended...and I baby this thing. Thanks in advance...
Anyone with a plow put this on their truck yet? https://timbren.com/blog/products-page/gmfk15cc/ After talking to Timbren it sounds like it was designed for the standard suspension trucks not the AT4 or trail boss so I'm curious about measurements on it and if it will fit. As I understand it they are on back-order until tomorrow or Monday then will begin shipping again. They said once I get it installed to measure the distance from the bottom of the rubber spring to the top of the upper control arm if it is not sitting on it and they will be able to send me a spring up to 1.5" bigger. They said depending on how GM installed the 2" lift for the AT4 it still may fit like it is supposed to. Anyone willing to go out to their truck and measure the distance from the hole here on the frame to the top of the upper control arm for me? I've marked it out in the photo below. (Not At4 or trail boss) Thanks in advance!
I was driving my 2019 Sierra AT4 on the highway with my cruise on 70 and the cruise suddenly shut off. I turned it back on and it seemed normal...a short time later my check engine light came on with no obvious side effects. I parked the truck for 2 days before driving again...check engine light shut itself off. I got back on the highway and set the cruise to 75...this is when it got weird...the truck told me the cruise was set to 77...then it changed to 72...and back to 77. It continued to do this with the speedometer jumping up and down but no obvious speed or RPM change. Anyone else experience anything like this? I took a video of it to show the dealer but not sure they are gonna know what it was doing...
Just checked the glove box for my 2019 Sierra AT4 and couldn't find the RPO label. Anyone else missing theirs or has GM hidden it somewhere else? It's not on the drivers side B pillar and there was a recall on my truck for a missing sticker related to the performance air intake...maybe they forgot the RPO?
I ordered the hypertech Speedometer Calibrators Inline - Part #730129 after installed my 35's...speedo was off by quite a bit at higher speeds and with a new truck i wanted it spot on. The calibrator was very easy to program and install and after checking with two difference GPS devices and a radar it is now spot on. Highly recommended.
So twice now, both after initial startup I have put my truck in reverse, backed up, stopped and put it in drive, then attempted to go forward (all in a fluid motion with a very short stop) but found the truck had shut down. I am assuming this has to do with the auto start feature but it certainly shouldn't be doing this. I talked to my trusted dealer and he said it definitely shouldn't be shutting down in reverse and furthermore the auto start feature shouldn't be activating until the truck has warmed up. He said if they could get it to replicate a TSB would likely go out on it and possibly a safety recall. Has anyone else experienced this symptom?
Most OnlineNewest Member
Who's Online 112 Members, 0 Anonymous, 2,985 Guests (See full list)
- Kaze Morrissey
- Booger T
- Gmc miner
- Ian Mills
- Frank Orris
- Joe Jacoby
- Andrew Garrison
- Scott Killman
- Mario Scaramouche
- H-town Silver Bullet