Table 1 shows seven common electrical system related problems of the 2003 GMC Sierra 2500. The number one most common problem is related to the electrical system (ten problems). The second most common problem is related to the instrument panel (six problems).
Blower motor resistor does not operate. Upon inspection, harness and final stage are damaged due to excessive heat. I need to replace both components because I fear it will cause a fire. Many posts on the same thing. Read details...
2003 GMC Sierra 2500 hd ext. Cab, 8-ft. Box. In cooler weather, fall, winter, spring, the gauges malfunction. That is, the speedo and tach read wildly high or don't activate at all, and the other gauges all are non functional. This is intermittent and is apparent when starting on cold mornings. Read details...
The contact owns a 2003 GMC Sierra 2500. The contact stated that the heater light failed first followed by the driver's side instrument panel lighting. He took the vehicle to the dealer and they stated that the failure was not covered. Read details...