Conditions for Setting the DTC

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The vehicle speed decreases by at least 4.2 km/h (2.6 mph) within 0.25 seconds.
The PCM detects a TCC brake transition.
The PCM does not detect a stop lamp switch transition.