B0081 3A
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The SDM sets this DTC when the SDM has received a message from the PPS which indicates a mismatch between the SDM and PPS module. There is either an incorrect SDM or PPS module installed on this vehicle.