Conditions for Setting the DTC

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

When the BCM has grounded the left rear power window down relay control circuit and the control circuit is shorted to battery positive voltage.
The above condition is met for 250 milliseconds.