One problem related to rear window wiper washer motor has been reported for the 2002 GMC Envoy. The most recently reported issues are listed below.
Contact statesd the windshield wipers will not work except on high. The service dealer stated a bad air conditioning cycling switch caused the windshield wipers to fail. They stated the ignition switch module, windshield wiper module, and the air conditioning cycling switch needed to be replaced, and the computer program needed to be updated. The engine lost all power while driving; there were no warning lights or indication that there was any thing wrong with the vehicle. There was a recal 04v046000 on the windshield wiper motor, the recall was serviced, but the consumer stated the module was already broke. The vehicle will be serviced, but at consumer's expense. The consumer has already filed a complaint on the ignition switch module.