The contact owns a 2007 GMC Envoy. While driving various speeds, the service stabilitrak warning indicator periodically illuminated. Also, the stabilitrak active indicator periodically illuminated, which caused the vehicle to stall. When the contact released and re-applied the accelerator pedal, the stabilitrak deactivated and the vehicle functioned normally. Occasionally, when the brake pedal was depressed, the brake pedal vibrated violently and the vehicle hesitated to stop. When the vehicle was stationary and the brake pedal was depressed, the vehicle accelerated forward. Furthermore, the driver's seat was unable to move forward. When attempting to adjust the seat manually or with the power position adjuster, the seat failed to adjust until after a period of time. The vehicle was taken to bowser Buick GMC (1001 clairton blvd, pleasant hills, pa 15236, (412) 346-7929) where the contact was informed that the driver's door module needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failures. The failure mileage was 90,000.

- South Park, PA, USA

GMC has known that they have intermittent stabilitrak system since Oct 1-2008. Don't know if it actually shuts off ABS brakes or just sets indicator lights off. Comes on more frequently in cold months. Tsb #08-05-25-005 why should consumer pay for either defective steering yoke yaw sensor, reprogramming or new $400 ebcm or $250 dealer service charge each time it comes up. In winter, another article said it was bad connectors. That would be a mfg defect as well. Always comes up in sharp slow speed turns. Already paid for two front hubs as they said it was the speed sensor, problem was not resolved. Braking or known stabiltrak problem over several years should warrant a recall not tsb where the cost is absorbed by the vehicle owner.,

- Atkinson, NH, USA