Diagnostic Aids

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Repair any brake system related DTCs before performing this diagnostic.

In order to avoid a misdiagnosis, perform the following:

If a BCM has been replaced, the brake pedal position (BPP) sensor must be calibrated. Refer to Brake Pedal Position Sensor Calibration .
Inspect for proper operation of the stop lamps. Refer to Exterior Lighting Systems Description and Operation .
For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .