Trailblazer 2008, Problem is while running the gears stop working
Asked by GuruDZ1D1B Dec 11, 2023 at 12:30 AM about the 2008 Chevrolet Trailblazer
Question type: Maintenance & Repair
Hi, I have Trailblazer 2008, Problem is while running the gears stop working,
even showing D on the dashboard, all gear not working. I have to stop the car,
off the engine and start it again. Once engine restarted all gear start working
well.
3 Answers
Sounds like a TCM error, but I recommend you have a transmission shop run stand alone tests on the transmission, that should tell you if it is all electronic or if there’s a valve body issue.
The truck is fifteen years old, and in that time, automatic transmissions do go out. But your symptoms could point to something more simple, like fluid that's low and dirty, and a clogged filter. Or it might be that all the shift solenoids are going out. Have the transmission checked by a professional... It's still possible that the valve body seals are gone and pressure across the gears is doing this.
