P0634 GMC -

Question

The code came up while I'm driving on the road to my destination,but is shifting well,is it ok to keep driving or stop to let it cool off.

Answer 1

Hi there,

This code indicates an issue with the transmission control module. Here is some info for you.

P0634 GMC - Transmission Control Module Overtemperature

Read more: https://www.autocodes.com/p0634_gmc.html