Diagnostic Aids

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

Verify that the brake pedal position sensor switch is adjusted properly. Refer to Brake Pedal Position Sensor Calibration .
Test drive the vehicle if a switch or circuit condition cannot be located. An intermittent condition may be duplicated during a test drive.
For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections .