B1019 3A

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The vehicle was configured for passenger presence system (PPS) but the SDM does not detect that all the PPS indicators are present due to loss of power at indicator, or an open indicator control circuit.
The vehicle is not configured for PPS and the SDM detects that the PPS indicator is present.