2003 GMC Yukon XL Denali Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2003 GMC Yukon XL Denali

2003 GMC Yukon XL Denali Problems

Heating 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.

Check Engine Light Due to Gas Cap Issue

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

Rear Window Defogger Wire Terminal Broken Off of Window Glass

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.

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2003 GMC Yukon XL Denali Recalls

Hydro-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.

Fuel Tank May Leak in a Crash

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.

Some Door Welds May Not Be to Specification

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.

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2003 GMC Yukon XL Denali Reviews

Nice vehicle for hauling a family and full load, lots of room. We bought our 2003 Yukon Denali brand new. Issues we have had with this car have been the following : 1. Replace the intake gaskets, very pricey fix about $1000 2. Instrument panel lights 3. Rear suspension auto levelling system went bad, installed aftermarket overload suspension to replace the auto level system 4. Leaks from power ...
I will NEVER buy another GMC as long as I live. I had trouble with it loosing power in the MIDDLE of the interstate. Like to have never got that fixed. The suspension light has been on since I bought it I've had that checked by different mechanics (couldn't find anything wrong) The check engine light has been on (had it put on machine to run diagnostics by different mechanics dealer and nonde...
I have had this car for 2 years with NO problems! I would buy a newer denali in the future!

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