B1019 00

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 SDM was programmed with the wrong options for the vehicle.
The wrong components were installed for the content of the vehicle.
SDM connector may have bent pins or shorting bars causing the SDM to learn deployment loops that are not actually present.