Circuit/System Testing
WARNING: This page is about a different car, the 2007 Pontiac Montana SV6, 2007 Chevrolet Uplander, and 2007 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
If DTC C0870 is set, diagnosis it before performing this diagnostic.
Verify DTC C1100 is not set.
- If DTC is set, replace the EBCM and the Brake Pressure Modulator Valve.