One problem related to dash wiring has been reported for the 2003 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 GMC Sierra 2500 based on all problems reported for the 2003 Sierra 2500.
The vehicle has had failure of the air conditioner and heating. Resulted in fired in the dash board wiring twice. Had been in the shop for heating and air conditioner eight times.