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Found 3 results

  1. Hey Everyone- I have a 2022 AT4 (5700mi) and its it has a shudder/hesitation during steady and/or light throttle acceleration between 25 and 70 MPH. Anyone else experiencing this or has and got it "fixed". Reproduced it for a ride along with the dealer, but need to figure out a plan or approach to fix this. They have mentioned maybe a fuel injector, maybe a new transmission.... Thoughts? Recommendations? Also, what site does everyone use to search for TSB's?
  2. Does anyone know the real reason for the delay of the release of whipple supercharger for 2019 GMC AT4 6.2? Also has anyone heard when available? I can not get straight answers. I have been told a few different things like this Sierra has new computer from 2018. The air filter is on opposite side than last design so the redesign is taking longer. I ordered my AT4 2 weeks ago and wanted to time it to have it all to install when truck arrives. Not looking good atm. Any info helps. Thanks!
  3. Hi all, this is my first ever truck. Came from a ’16 Cadillac CTS which gave me non-stop issues. Decided it was time to try something else. I replaced the CTS with a ’19 Sierra AT4 6.2 fully loaded not too long ago and really loving this truck. Almost too much tech. That 6.2 engine is easily excited ?. Still getting used to driving and parking such a big vehicle having driven sedans all my life. My biggest peeve so far is that I almost wrecked it during my first week. I hit a medium bump on the road going 35mph and lost control of the truck as it swerved violently into the left lane. Luckily for me, there was no vehicle in the left lane as I think I would have probably hit it. Really shook me for a while. Chalked it up to not being used to driving a truck. After reading this forum quite a bit, I’ve come to the realization it could be a problem with this generation of the Sierra/Silverado. I’m now extremely careful when I go over bumps because it feels like the truck is sliding. I’ll be monitoring that thread to see if a solution crops up. Anyways, happy to join this community. Hope you are all nice ?.
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