Diagnostic Aids
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
Inspect the air temperature door and the air temperature actuator for the following conditions:
- A misaligned air temperature actuator.
- Broken or binding linkages or air temperature door.
- An obstruction that prevents the air temperature door from operating within its full range of motion.
- Missing seals to the air temperature door.
- Misaligned seals to the air temperature door.