Power Sunroof Express Feature Malfunction
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the sunroof switch.
- Ignition ON, with the sunroof in the closed position, connect 3A fused jumper wires between both signal circuits listed below and ground for less than 1 second. The sunroof should express open.
- Terminal 1
- Terminal 6
- If the sunroof does not express open, test the signal circuit terminal 1 for a short to voltage or an open high resistance. If the circuit tests normal, replace the sunroof control module.
- Ignition ON, with the sunroof in the closed position, connect 3A fused jumper wires between both signal circuits listed below and ground for less than 1 second. The sunroof should express close.
- Terminal 1
- Terminal 4
- If the sunroof does not express close, test the signal circuit terminal 1 for a short to voltage or an open high resistance. If the circuit tests normal, replace the sunroof control module.
- If all circuits test normal, test or replace the sunroof switch.