38 problems related to electrical system have been reported for the 2002 GMC Envoy. The most recently reported issues are listed below.
Vehicle has stalled twice at 65 mph. Vehicle taken to dealer 6 times. Dealer replaced computer. Consumer states vehicle is experiencing electrical problems. Air level system deflates each night, part is on back order.
Windshield wipers and transmission are not functioning properly due to a malfunction in the electrical system.
Consumer states while comiing down a hill pcm shorted out. As a result, driver lost all electrical functions. Steering wheel got really stiff. Brake pedal became hard to press.