First post here so hoping I can find an answer as everywhere else I’ve searched came up empty.
Here we go…2012 Chevy 1500 Crew Cab LT 5.3 vortex flex fuel….First question..When I’m at a stop light “sometimes” there’s a very subtle “clunk” almost as if it’s gearing down…thoughts?
Second and more urgent question…The other day it was over 100 degrees out, was driving through town and the dash said “Service Stabalizer Control” the light came on for the traction and stabalizer and it started shifting a little harder. I got it home and parked it. Woke up the next morning to go to work, it was significantly cooler outside and the warning lights were off, truck drove perfectly fine and nothing since??? Any thoughts or advise would be fantastic…thanks in advance!!!

 

I'd put a scantool that can read transmission issues (TCM).