transmission slipping

2008 GMC ENVOY
214 MILES • 4.2L • 6 CYL • 4WD • AUTOMATIC
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BIGGS
  • MEMBER
  • 16 POSTS
slipping in third gear after warming up.
May 29, 2017 at 7:07 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Hello,

I would start by serving the transmission and replacing the filter. Here is a guide to show you what you are in for when doing the job

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Please let us know what happens.

Cheers, Ken
Jun 1, 2017 at 11:34 AM
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