2003 GMC Sierra 3500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 GMC Sierra 3500
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2003 GMC Sierra 3500 ProblemsCheck Engine Light Due to Gas Cap Issue
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.
It is common for the fuel level sensor in the fuel tank read the fuel level incorrectly. The sensor must be replaced to correct the condition. Our technicians recommend having the complete fuel pump module replaced on high mileage vehicles.
2003 GMC Sierra 3500 QuestionsMy Heated Seat Control keeps coming on without notice & It wont shutoff turns on (1 answer)
The heated seat indicator comes on and I shut it off and it constantly comes back on automatically. Any suggestions what the problem would be?
How do I remove the starter?
changed motor oil and filter changed feul filter engine still smokes
2003 GMC Sierra 3500 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.