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2008 GMC Sierra 2500 HD Problems

Find the most common issues based on 2008 GMC Sierra 2500 HD owner complaints.

Most Common 2008 GMC Sierra 2500 HD Problems

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...
The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will ...
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 replaceme...
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Looking for a particular 2008 GMC Sierra 2500 HD problem?

0 Known 2008 GMC Sierra 2500 HD Brakes Problems

2 Known 2008 GMC Sierra 2500 HD Drive Train Problems

The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will ...
Our technicians highly recommend that the transmission is serviced every 30,000 miles to avoid problems and maintain optimal operating order.

2 Known 2008 GMC Sierra 2500 HD Electrical & Lights Problems

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 replaceme...
The keyless entry system may stop working. Our technicians tell us the key fobs and keyless entry receiver may need to be replaced to correct this fault.

2 Known 2008 GMC Sierra 2500 HD Engine Problems

The GMC Sierra 2500 HD uses a throttle position sensor (TPS) which commonly fails and causes: Check engine light illumination Reduced Power message OBD trouble code P2135 This issue is rela...
Gas engines onlyThe spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.

1 Known 2008 GMC Sierra 2500 HD Exhaust & Emissions Problem

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

2 Known 2008 GMC Sierra 2500 HD Heating & Air Conditioning Problems

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...
Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.

0 Known 2008 GMC Sierra 2500 HD Maintenance Problems

1 Known 2008 GMC Sierra 2500 HD Miscellaneous Problem

Our technicians recommend flushing the brake fluid every 60,000 miles. Brake fluid that is dirty may cause problems in the brake system.

0 Known 2008 GMC Sierra 2500 HD Suspension & Steering Problems

10
Known 2008 GMC Sierra 2500 HD Problems & Complaints

The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will ...
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...
The keyless entry system may stop working. Our technicians tell us the key fobs and keyless entry receiver may need to be replaced to correct this fault.
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 replaceme...
The GMC Sierra 2500 HD uses a throttle position sensor (TPS) which commonly fails and causes: Check engine light illumination Reduced Power message OBD trouble code P2135 This issue is rela...
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.
Our technicians recommend flushing the brake fluid every 60,000 miles. Brake fluid that is dirty may cause problems in the brake system.
Our technicians highly recommend that the transmission is serviced every 30,000 miles to avoid problems and maintain optimal operating order.
Gas engines onlyThe spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.
Get a Repair Estimate
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RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
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