Component Testing
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Sunroof Switch
- Ignition OFF, disconnect the harness connector at the sunroof switch.
- Test for infinite resistance between the switch terminals listed below and the ground circuit terminal 5 with the switch in the open position.
- Express open/close (Crew Cab) terminal 1
- Sunroof close terminal 4
- Sunroof open terminal 6
- Vent close (Crew Cab) terminal 8
- Vent open (Crew Cab) terminal 2
- If not the specified value, replace the sunroof switch.
- Test for less than 5 ohms between the switch terminals listed below and the ground circuit terminal 5 with the switch in the closed position.
- Express open/close (Crew Cab) terminal 1
- Sunroof close terminal 4
- Sunroof open terminal 6
- Vent close (Crew Cab) terminal 8
- Vent open (Crew Cab) terminal 2
- If greater than the specified value, replace the sunroof switch.