Right Side Impact, I/P, and Roof Rail Modules, Passenger Seat Belt Pretensioner
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Right Side Impact, I/P, and Roof Rail Modules, Passenger Seat Belt Pretensioner Wiring Schematic