One problem related to headlights turn off while driving has been reported for the 2005 GMC Envoy. The most recently reported issues are listed below.
Tl-the contact owns a 2005 GMC Envoy. The contact stated that while driving, the contact noticed that the front passenger head light flickered and then failed. An independent mechanic replaced the headlight and fuse but the failure persisted. The contact stated that while driving, the front driver head light flickered and then failed. The vehicle was taken to an independent mechanic but the failure could not be duplicated. The manufacturer was made aware of the failure. The approximate failure mileage was 133,000. Sms.