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2014 GMC SIerra 1-2 shift jolts @ WOT (newbie)


Cory1316

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Posted

Hello all! New to the site and have read some threads about 2014 gm 1500 owners having shifting issues. Please help!! driving me nuts. My 2014 sierra 5.3 4x4 with 3.42 and 6" pro comp lift feels like shifting a manual at WOT. Example getting on freeway. Don't know how to convince the dealer there is a problem. I'm sure I will get heat about lifting the truck from the dealer. Sure they will say that's why it shifts funny. Anyone had there gmc trans software updated??

Posted

Hello all! New to the site and have read some threads about 2014 gm 1500 owners having shifting issues. Please help!! driving me nuts. My 2014 sierra 5.3 4x4 with 3.42 and 6" pro comp lift feels like shifting a manual at WOT. Example getting on freeway. Don't know how to convince the dealer there is a problem. I'm sure I will get heat about lifting the truck from the dealer. Sure they will say that's why it shifts funny. Anyone had there gmc trans software updated??

It can't be updated unless there IS an update available in the system ,,,

 

I don't like lifted trucks but a shift concern should be investigated and you HAVE to be in the truck with the shop Forman on the road test ,

 

They'll scan it for giggles ... If nothing shows up electrically then a mechanical inspection of oil level and condition is next , if that is fine I'm afraid it is normal as programming will max line pressure at certain conditions .

 

I hope this helps

 

( I really hate lifted trucks ) as a tech , they are awfull lol

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