Diagnostic Aids
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- The condition may be intermittent. Refer to TESTING WIRING SYSTEMS FOR INTERMITTENT & POOR CONNECTIONS in Wiring Systems.
- The air temperature actuators can be calibrated. Refer to RE-CALIBRATING ACTUATORS (PRIMARY) or RE-CALIBRATING ACTUATORS (AUXILIARY HVAC) .