The contact owns a 2006 GMC Envoy. While driving 35 mph, the traction control malfunctioned. The contact did not take the vehicle to the dealer because it was a long distance away from the contact's residence. The manufacturer was notified of the traction control failure and advised the contact that there were no recalls relating to the failure. The failure mileage was 147,000.

- Brightfoot, ID, USA

Stabilitrac and/or ABS system engages when not necessary such as driving on dry, straight pavement at highway speeds. Causes vehicle to decelerate suddenly and almost lose control when brakes activate and motor retards. Electrical system also fluxuates (altimeter bounces from low to hi) causing a loss of power with associated loss of steering, lights, braking controls, at any speed. Problem has been increasing (frequency & severity) from July, 2009 to present (Jan, 2010). Dealer shop did stabilitrac tsb firmware upgrade (and charged me) w/O correcting problem, also retested and "could not find anything wrong":battery is new but problem persists. 55,000 miles, mostly highway/improved roads. This occurs every time, literally, the vehicle is moved: 30-40 miles/day. 1/6/10 engine developed "low growl" noise and RPM dropped from ~800rpm to ~600rpm at parked idle w/O any apparent cause. Now idle at start is normal, but within 1-2 minutes drops and remains low with growl noise.

- Banks, OR, USA