Conditions for Setting the DTC

WARNING: This page is about a different car, the 2007 Hummer H2. 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 second.
The PCM detects a TCC brake/cruise release signal transition.
The PCM does not detect a stop lamp switch transition.