2008 GMC Envoy V6 Fuse Box Diagram 2008 GMC Envoy V6 Fuse Box Map Fuse Panel Layout Diagram Parts: headlamp high beam relay, headlamp low beam relay, inclination sensor, ambient light sensor signal, courtesy lamp, remote radio control signal, instrument panel lamp dimmer switch, headlamp washer relay control, battery positive voltage, rear window wiper switch, …