Circuit Description
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.
The body control module (BCM) receives a signal from the brake pedal position sensor through the brake pedal position sensor signal circuit. The BCM then applies voltage through the stop lamp supply voltage circuit to the powertrain control module (PCM) or engine control module (ECM), electronic brake control module (EBCM) and the stop lamps.