Circuit/System Testing
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 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 right steering wheel control switch.
- Ignition ON, test for B+ between the voltage reference circuit terminal 3 and ground.
- If less than the specified value, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
- If greater than the specified value, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the BCM.
- If all circuits test normal, test or replace the right steering wheel control switch.