Circuit/System Description (PPS)
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.
This diagnostic is specific to the passenger presence system (PPS) module. The internal fault detection is typically handled inside the control module, however the PPS module may set DTC B1000 due to other system malfunctions.