2003 GMC Sierra 2500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 GMC Sierra 2500
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2003 GMC Sierra 2500 ProblemsImproper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator
One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.
2003 GMC Sierra 2500 QuestionsBurning too much gas after oil change (1 answer)
I was getting 800 KM. per tank before oil change now getting 600Km.
humming noise coming from underneath cab
2003 GMC Sierra 2500 RecallsRecall 05V161000
The second row center seat belt routing may make it difficult to position correctly on smaller passengers. If the seat belt rides up to fit around the abdomen, the risk of internal injury is increased in a crash. Dealers will cut the guide loop, remove a portion of the loop, and the remaining sides should be folded over and secured with a retainer. The recall began July 21, 2005. The GM recall number is 05037.