2003 GMC Yukon XL Denali Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 GMC Yukon XL Denali
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2003 GMC Yukon XL Denali ProblemsHeating and AC Temperature and Air Delivery Mode Door Actuators May Fail
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 rear window defogger may stop working due to a wire terminal broken off of the rear glass. Our technicians tell us that terminal can be reattached using a special glue or silver solder.
2003 GMC Yukon XL Denali QuestionsHow to find body type code? (1 answer)
Body type code?
2003 GMC Yukon XL Denali RecallsHydro-Boost Relief Valve May Not Function Properly
The hydro-boost housing relief valve bore may be out of specification. The seal may fracture as a result, which may reduce braking assist and slightly increase the steering effort while braking. Under certain conditions, more braking effort will be required to stop the vehicle. Dealers will replace the hydro-boost relief valve. The recall began June 18, 2004. The GM recall number is 04004.
In 30 degree left angle frontal crash conditions with a severe enough impact, the fuel tank may be punctured by a torn mid-frame cross member. A fuel leak in the presence of an ignition source may result in a fire. Dealers will install a fuel tank shield. The recall began February 20, 2003. The GM recall number is 03002.
On 107 vehicles, one or two welds on the rear door upper hinge may not be to specification. This may cause the door strength to be reduced in a side impact crash. Dealers will inspect the welds and install a bolt to secure the hinge if any are found to be out of specification.