GMC 2500 Pickup
Report: Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail
GMC 2500 Pickup Problem
One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.
Visitor, 1997 GMC 2500 Pickup, 180,000 mi
left side of defrost vent is always in the open position