2008 GMC Sierra 2500 HD Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2008 GMC Sierra 2500 HD

2008 GMC Sierra 2500 HD 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.

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).

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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2008 GMC Sierra 2500 HD Questions

noise in front end at highway speeds? (1 answer)

there is a roar in the front end at highway speeds. the noise gets less with slower speeds and higher speeds.

HARD START COLD ENGINE (1 answer)

THIS TRUCK WHEN COOL OR COLD STUMBLES & HESITATES TO START
FUEL PRESSURE 60 T0 66 PSI COLD & HOT. MASS AIR FLOW CORRECT ,TPS CORRECT, MAP CORRECT, REPLACED THROTTL BODY,
HOOKED UP BATTERY CHARGER, SAME THING, DID A INJECTOR DROP TEST ALL PASSED WITH SAME DROP IN PRESSURE,PULLED POST O2 ...

wrong fuel in Desiel lines (1 answer)

Trying to find out the best way to clean fuel lines that have Gas instead of diesel fuel includng how to remove excess fuel in the fuel pump befre repriming?

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2008 GMC Sierra 2500 HD Recalls

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.

Auxiliary Battery Fuse Link Melts

If too much current is drawn from the auxiliary battery, the fusible link can melt, causing risk of fire. Dealers will replace the jumper harness with one that includes a 40 amp inline fuse, and provide vehicle owners with supplemental owners manual information free of charge to resolve the problem.

Possible Under Hood Electrical Fire

The heated washer module under the hood could overheat due to excessive current draw. Under certain conditions, this could result in an under hood fire. This previous recall attempt in 2008 to repair this concern did not have the expected success. Dealers will now permanently disable and remove the heated washer module to correct this concern. This recall is expected to begin on June 20, 2010.

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