GMC Envoy HVAC actuator Replacement

HVAC actuator replacement on a 2004 GMC envoy SLT with Automatic climate control. After replacing the Blower control module this GMC envoy would only blow air out of the defrost vent, a telltale sign of a faulty Mode door actuator. I show you how to replace an HVAC actuator and Perform an HVAC module recalibration. Applies to all vehicles based on the GMT 360 platform which includes 02-09 Chevrolet Trailblazer, 02-09 Gmc Envoy, 02-04 Oldsmobile Bravada, 03-07 Isuzu Ascender, 04-07 Buick Rainier and 05-09 Saab 9-7X