Around 55000 miles I started getting Service Stabilitrak Service Traction Control warnings when the temperature is above approximately 83F. 2011 Avalanche 4WD. This occurred first shortly after I was subjected to a hard sell for a transmission flush and refill I didn't think was necessary.

After the first warnings, the dealer replaced fluids and filters. Warning went away for a week or so.

The dealer seems to have no clue as to what is causing it. It has been continuous in warmer weather. Now out of the extended warranty. This is my second Avalanche and may likely be the last GM product.

Any suggestions? I don't trust my dealers service department.