2019 gmc serria harsh 1-2 shift

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Joined: Thu Oct 31, 2013 2:58 pm
First Name: Barry
Last Name: Cole
Location: Toronto, Ontario ,Canada

2019 gmc serria harsh 1-2 shift

Post by barrycole » Sat Oct 12, 2019 8:04 pm

Hi folks, been a long time since i have been in the trade and on this site. Retired now and looking for some info. have a 2019 GMC Serria 4x4 pickup. 5,7l Has a harsh 1-2 shift, I figure it has the 8speed trans. Dealer says this is normal! Not in my day , this is normal!!! Harsh shifts was the EPC making up slip! Can anyone answer this one for me? Miss the brain storming of this industry!!
Barry Cole Toronto, Ontario, Canada. Retired after 35 years

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First Name: Rod
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Location: Calgary, Alberta

Re: 2019 gmc serria harsh 1-2 shift

Post by carod » Wed Dec 25, 2019 10:34 pm

I would check for codes. Often a code can cause the trans pressure to rise giving you a
hard 1/2 shift. This is common on a 4L60E. The code does not have to be a transmission
code to cause this roblem.

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