GMC Sierra 1500 owners have reported 4 problems related to dash wiring (under the electrical system category).
2004 GMC sierra crew cab - burning odor, soot on dashboard, rear windows fail to operate. No blown fuses. Taken to thompson's GMC dealership in placerville CA for repair on October 20. Gm service department states: wiring harness for rear windows and door locks passes under and rubs against arm of parking brake pedal, leading to short circuit and failure of rear windows. Wiring harness replaced by gm service department. I can see that the new wiring harness also comes into contact with arm of parking brake pedal!
I have the old part. Consequences: burned wiring, loss of vehicle for 8 days, $772. 04 in repair cost.
See all problems of the 2004 GMC Sierra 1500.
While driving I tilted my steering wheel and the headlights stopped working. I found that as I moved the wheel up and down there was a spot at which the lights would stop working. After going to the dealership I they found that a wire in the junction block of the multifunction switch (blinker assembly) had shorted out causing the lights to go out. Dealership replaced the multifunction switch.
See all problems of the 2001 GMC Sierra 1500.
Fan speed 5 will not work and speed 4 smell like burning wires, drivers temp control will not work only cold air. Connector under passenger side fan black wire burned into and melted connector. GMC parts man said there was a national backorder on parts because so many wes go bad.
See all problems of the 2005 GMC Sierra 1500.
The fuel gauge quits at various times, reading zero and the low fuel light comes on. It seems to be a relay problem in the instrument panel. The off duration is getting longer and is not realted to fuel tank level nor to vehicle movement. Shutting the ignition switch off and then back to on will usually cure the problem. Some times when the fuel gauge comes on the level rises very slowly, taking several minutes to reach the full level with the tank full.
See all problems of the 2000 GMC Sierra 1500.