2004 Gmc Envoy Service 4Wd Light. Apr 06, 2014 • 2003 gmc envoy xl. Four wheel drive inoperative and the 4wd service light will illuminate.

In addition to a lit service 4wd light, you may notice erratic operation of the 4wd or awd, especially after driving in rain, snow, or after going through a car wash. 4 wheel drive service light came on when i was checking all of the fuses to find out which one was for the running lights to pull a trailer. My light comes on to service my 4 wheel.