GM Repair Questions? Ask a Mechanic for Answers ASAP
i tried this and after i hooked the battery back up and turned on the key it did sweep the actuator for the rear temp door. After it completed the sweep it stayed in the heat position which is where the temp selection knob was set. However, when i started the vehicle to let it warm up and see if everything was working the rear temp door returned to the cold position. I repeated this process twice with the same results, now what?
By the way the coolant is flowing through the rear heater core. I checked the lines under the rear of the vehicle and they were getting hot