GMC 2500 Pickup Problem Report

GMC 2500 Pickup Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator

(6 reports)

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.

left side of defrost vent is always in the open position -
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