Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the stop lamps and test the individual stop lamp assemblies for internal shorts between all terminals.
- If a short between terminals is found, replace the stop lamp socket or circuit board as applicable.
- Test the stop lamp supply voltage circuit for a short to ground.
- If all circuits/connections test normal, replace the BCM.