Two problems related to headlights turn off while driving have been reported for the 2002 GMC Envoy. The most recently reported issues are listed below.
1: passenger seat belt likes to suffocate my passengers until they release rhe seat belt and rebuckle. 2: both dim headlights went out, checked relays, fuses, and bulbs nothing has worked. Then found out my 2 brake lights are out along with the dims and not sure what is causing this problem.
The low beam headlights go out with no warning. The high beams will work. This has become a problem everytime the vehicle is driven at night.