Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Apply and release brake pedal. Verify brake lamps operate properly. If brake lamps do not operate properly, refer toSymptoms - Lighting Systems .
- Test the stop lamp supply voltage circuit for a short to voltage, short to ground, an open or high resistance.
- If the stop lamp circuit tests normal, replace the EBCM/BPMV assembly.