2004 GMC Yukon XL 2500 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2004 GMC Yukon XL 2500

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2004 GMC Yukon XL 2500 Problems

Instrument Panel Lights Flickering and Exterior Lights Intermittent

The headlight switch used on the GMC Yukon XL 2500 is known to fail through normal operation. Since the headlight switch is also integrated into the interior lights, a malfunctioning switch can cause issues with interior lights as well.

  • Symptoms of a failed headlight switch include:
  • Headlights and taillights failing to turn on or off
  • Interior lights flicker, or fail to turn on or off
  • Gauge cluster lighting off or flickering with headlights on
  • Parking light malfunctions  

This issue is well known with General Motors Trucks and SUVs, and is solved by testing and, if needed, replacing the headlight/dimmer switch. Bad grounding wires at the tail-lights, and dirty/corroded tow package wires can also lead to some of these issues. 

GM Headlight Switch

Speedometer or Other Instrument Panel Gauge May Work Erratically

The speedometer or other instrument panel gauge may begin to work erratically at times. Our technicians tell us that the instrument cluster must be sent to a repair facility to correct this fault. The warranty has been extended on some of these units to 7 years or 70,000 miles.

Check Engine Light Due to Gas Cap Issue

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

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2004 GMC Yukon XL 2500 Questions

4wd problems. My 4wd would not engage, the buttons would only blink (2 answers)

I replaced the axle shift motor,switch and shift motor. Where can I find a schematic ? Is there any relays, fuses etc. Shift motor is in neutral and won't engage any gears. Help!

Reduce Engine Power Indicator (2 answers)

My reduce engine power warning came on and the throttle was disabled. The engine was not overheating but I did replace the water pump and changed the oil. The warning light is still on and and throttle is still disengaged. I cant find any other problems with the engine. It idles fine with no ...

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2004 GMC Yukon XL 2500 Recalls

Fuel May Leak from Fuel Rail

The retainer clip for the fuel rail pulse damper may fracture and allow the damper to come loose from the fuel rail. A fuel leak in the presence of an ignition source may result in a fire. Dealers will replace the engine fuel rail pulse damper free of charge. The recall began August 31, 2006. The GM recall number is 06080.

Hydraulic Brake Booster May Fail

On vehicles equipped with the Bosch hydraulic brake booster, the boost pressure accumulator may crack and break away from the hydro-boost assembly during normal operation. If this were to happen while the hood is open, fragments from the accumulator could injure people standing in the immediate area. The loss of fluid while driving would cause increased steering and braking effort and a crash could occur without warning. Dealers will test the hydro-boost assembly for function of the two-function valve. If the hydro-boost assembly fails the test, it will be replaced free of charge. The recall began March 23, 2005. The GM recall number is 05006.

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.

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