2004 GMC Envoy Q&A
2004 GMC Envoy Question: i am replacing one front and 2 rear door blend actuators what do i need to do.
Alternate Method (w/o Scan Tool) Clear all DTCs. Place the ignition switch to the OFF position. Install the HVAC actuator. Connect all previously disconnected components. Remove the HVAC B fuse for a minimum of 10 seconds. Install the HVAC B fuse. Start the vehicle. Wait 40 seconds for the HVAC control module to self-calibrate. Verify that no DTCs have set as current DTCs. hope this helps - TristanReal