Two problems related to engine stall have been reported for the 2006 GMC Envoy. The most recently reported issues are listed below.
Engine stalled a few seconds after starting, then would not crank, only clicked. I had the car towed in for service. Technician checked battery. It was fully charged and vehicle had full voltage. Diagnostics determined low voltage out from the ignition switch. Recommended ignition switch should be replaced. I had the ignition switch replaced twice already. I have had to replace three ignition switches in three years at a total cost of $817. I understand that gm has recalled ignition switches on several models but the Envoy is not part of that recall. Obviously my vehicle has the same problem as the recalled vehicles, why is it not part of the recall? the first ignition switch failed at 65-70 mph on the freeway. This is a very dangerous problem. Since the rest of the electronics are connected to the ignition I have no safety equipment such as air bags. If I would have been in an accident, it could have been fatal.
The contact owns a 2006 GMC Envoy denali. While driving approximately 60 mph, the electronic stability control and traction control warning indicators began to illuminate. Immediately there was a substantial reduction in the speed rate. The failure occurred repeatedly whenever the vehicle was in operation. On two separate occasions the engine stalled without prior warning and restarted after waiting a few moments. The vehicle was taken to an authorized dealer seven different times. The ecm was reprogrammed and there were no additional repairs performed on the vehicle. The manufacturer was notified of the constant malfunction. The approximate failure mileage was 67,000.