2012 GMC tranny issues
I have a 2012 Sierra 2500 hd, gas 6.0, auto transmission. I tow an 8000 lb fifth wheel. The truck pulls the trailer well and generally shifts through the gears fine, with an exception. When I stop in ...
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We have a 2007 at work that had done this. One time a transmission was put in and another time the TPS was replaced.
