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, diagnose it first. Refer to DTC C0870 .

Verify DTC C0131-C0139 is not set.

If DTC is set, replace the BPMV and verify DTC does not reset. If DTC resets replace the EBCM.