Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail on GMC Sierra 1500 HD

Problem overview

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.

7 people reported this problem

1 comment

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GMC Sierra 1500 HD vehicles with this problem

4 model years affected

2004 GMC Sierra 1500

2003 GMC Sierra 1500 HD

2002 GMC Sierra 1500 HD

2001 GMC Sierra 1500 HD

2004 GMC Sierra 1500

2003 GMC Sierra 1500 HD

2002 GMC Sierra 1500 HD

2001 GMC Sierra 1500 HD

Average mileage: 122,500 miles

(115,000 - 130,000)

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Submitted by Vehicle Owner · May 29, 2025

Published by RepairPal

Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail on GMC Sierra 1500 HD

Problem overview

GMC Sierra 1500 HD vehicles with this problem

Repairs related to this problem

AC Diagnosis

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