2001 GMC Sierra 2500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2001 GMC Sierra 2500
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
Never overpay. Check prices with our estimator
2001 GMC Sierra 2500 ProblemsHeating 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.
The 4WD transfer case position sensor or the selector switch may fail causing the service 4WD message to be displayed.
2001 GMC Sierra 2500 QuestionsFluid forced out the top of the windshield washer reservoir. (1 answer)
When I activate my washers, fluid is forcibly blown out the top of the reservoir.
I do get fluid onto the windshield but am losing a ton of fluid out of the top of
the reservoir. How do I correct the issue?
the plug gap changes to .040 from .060 with stock and platinum plugs. What are the bet plugs to use in my 6.0 liter engine?
I have a 2001 GMC 1500 4.8l and I am getting 11-12 mpg's on the highway, could this be an 02 sensor? My air filter is new, plugs, wires, and fuel filter are also new.