Transmission issue

Asked by Apr 29, 2017 at 02:12 PM about the 2012 GMC Sierra 1500 SLT Crew Cab

Question type: Maintenance & Repair

My truck won't shift above 2nd gear. I felt no signs at all
that it might have been slipping. It just happened randomly
whole driving the truck. Overdrive and reverse work just
fine. Do I need a full rebuild or is it just a cylinoid? Probably
didn't spell that correctly. Thank you in advance for the
help!

2 Answers

It's possible that it's just that but it could also be your tranny starting to go out.

120,805

If it just started then it is very likely it is just being solenoids, a good tranny shop can pulgin to the transmission wiring and run separate tests on the solenoids, TCM and internal pressures, they then can tell you what is wrong and what it will take to fix it, but don't wait as this can cause more extensive damage and then your into for a full blown rebuild.

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