2nd Gear Slip on 5.3L Uphill

[racinjason14]

To me it's BS that my 2008 I traded in with 203,000 miles on it drivability wise drives better than my 2016. I didn't have these problems. Had I known what I was going to run into with how my new truck is. I wouldn't have bought it. I would have kept my old truck or looked at something else from another company

[sonerick]

It's definitely frustrating when you make an investment in a vehicle that fails to meet your expectations, but there are plenty of people with our trucks that have no driveability issues and are satisfied with their purchase. If you are not satisfied, I'd highly recommend returning to your dealer and having them take a look at it under warranty. Shit happens, and that's what the warranty is there for.

 

FWIW, my 2017 Silverado with the 5.3 engine and 3.42 rear end exhibited these same symptoms under light throttle around 30 mph, starting at about 500 miles. Wasn't there on the extended test drive. GM said the trans was learning, so I waited it out. Things improved marginally after a few thousand miles, but then I had the TSB mentioned earlier in this thread done and drove it for another few thousand miles and now the problem is resolved. Whether it was the trans learning or the TSB that helped, I am not sure.

[sonerick]

Some good info here: http://www.gm-trucks.com/forums/topic/198591-2017-gmc-sierra-1500-surge-hesitation-chuggle-misfire-feeling-with-a-light-tip-in/page-1

[Nardlyfe30]

Did you ever find a solution to this issue? I have a similar issue with my 2011 gmc sierra 5.3 with 166k and same rear gear ratio but recently mine seems to slip or not fully engage when manually shifting from 1st to 2nd with heavy acceleration but shifts just fine in drive under the same heavy acceleration i like how it shifts quicker when i manually shift it verses when its in drive or i wouldn't worry about it i also would like to fix the issue now or try something to prevent a big issue in the future. If theres any suggestions or fix i would appreciate it