2002 GMC Sierra 2500 HD Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2002 GMC Sierra 2500 HD
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2002 GMC Sierra 2500 HD ProblemsStalling or Low Engine Idle Speed Due to Dirty Throttle Body
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.
The headlight switch used on the GMC Sierra 2500 HD 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.
2002 GMC Sierra 2500 HD QuestionsAuto transmission will not up shift could this be electric or plantar gears (1 answer)
a couple try to start again