GMC Sierra 2500 HD Repair and Maintenance

A guide to problems, costs, maintenance and repair for your GMC Sierra 2500 HD

GMC Sierra 2500 HD Problems

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.

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.

Daytime Running Lights Are Prone to Burning Out

The daytime running lights are prone to burning out. Our technicians tell us that the light sockets may show signs of heat damage but usually are OK. Always be sure to use the correct replacement bulb for the best life expectancy. The new bulb recommendation for 2001-2003 models is #4114K (trade number).

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GMC Sierra 2500 HD Questions

Auto transmission will not up shift could this be electric or plantar gears (1 answer)

What can cause the dash to warn about the 4 wheel drive and an airbag message. Also my AC is not working (2 answers)

I just took my truck out after months of sitting idle. There is evidence of rat tearing. My truck now has a warning message to check the 4x4 system and the airbag. I inspected and only found that the rats ate the wires on the coolant level sensor connector. My AC is also not working and makes...

How do I install the ignition cylinder lock CASE? (1 answer)

I drilled out my ignition cylinder too far, ( in the dark)....I now need to install the case, and the cylinder....do I need to pull the steering wheel?..if so, can u give me step by step instructions please?
Signed...using power tools without light..:(

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GMC Sierra 2500 HD Recalls

Brake Pedal Comes Loose And Fails To Operate

The brake pedal may loosen and fail to operate properly, due to the loosening of a pivot nut. Dealers will inspect the brake pedal pivot nuts and add thread adhesive, tightening the nut as necessary free of charge to resolve the concern.

Front Passenger Air Bag Defective

In a crash that deploys the passenger front air bag, the inflator of the air bag can rupture, causing metal debris to strike vehicle occupants. Dealers will replace the front passenger air bag inflator free of charge to correct the concern.

Ignition Switch

The ignition switch actuator can bind causing the ignition switch to stick in the "start" position. If this were to occur the actuator can unexpectedly release, cause the ignition switch to snap back into the "Accessory" position. This would cause the engine to turn off with an associated loss of brake and steering power assist. If these conditions were to lead to a crash the airbags may not deploy as expected. Dealers will inspect and replace the ignition lock housing as necessary to correct this concern.

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GMC Sierra 2500 HD Reviews

Why did my inside/outside a.c. door quit working. Button dash lights up but door does not move. 2002 GMC Sierra 2500hd duramax
Picked up a used 2005 GMC Sierra 2500 HD which was in very good shape. Other than a few cosmetic blemishes, it was respectable. The motor is very strong and has good power, even on steep inclines here in the mountains. I honestly think you could tow just about anything you want with this truck. Plenty of power to do the job. The transmission shifts smoothly, and you barely even notice when it ...
Hello my truck runs great but the A/C / Heat control only works on HIGH!! I think I'm going to change out the control unit . How does that sound??? THANKS!! Oh also the turn signals ,when activated left/ right set the hazards off?!?! Spooky

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