2001 GMC Sierra 1500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2001 GMC Sierra 1500
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2001 GMC Sierra 1500 ProblemsImproper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator
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 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.
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 be of assistance in determining the exact fault causing the message to be displayed.
2001 GMC Sierra 1500 QuestionsWould a bad fuel pressure regulator contribute to erratic shifting ? (1 answer)
It will run ok on flat land. It seems to shift ok when in town. But if you throttle it to pass or climb hill, it falls and acts like it is braking and downshifts.
It still has a slight leak. What else could be the problem?
air doesnot blow out of the vents on the dashboard only blows out of the vents on the side of the dash board and the console. its cold though.i want to know why it is not coming out of the dashboard,