Three problems related to ignition switch have been reported for the 2002 Chevrolet Avalanche. The most recently reported issues are listed below.
2002 Chevrolet Avalanche 1500. Ignition switch is shorting out, have to jiggle key to start. When driving tuck looses power and shuts off loosing all power steering and all power brakes. Had to muscle truck to shoulder of roadway and restart. Does this intermittently without warning. This is very dangerous situation.
Main ignition switch does not always supply power to all electronic equipment. When failure occurs the lights and alarms on the instrument panel do not function and the transmission fails to shift correctly. Switch has to be replaced.
Intermittent at highway speeds all warning lights come on. All dash gages zero out and the engine is non responsive to additional throttle. After pulling over and cycling the ignition off and back on the gages will intermittently reset and work properly. This was reported to local Chevrolet dealer. They duplicated the problem in a test drive and stated it was because of a after market auto start security system. The company that installed the auto start system checked it out and found nothing wrong with the install or the auto start hardware. I had them remove the auto start hard ware, the problem manifested again. I took it back to the Chevrolet dealer. They diagnosed the problem as the ignition switch. Removed and replaced switch.