Left Side Impact, Roof Rail, and Steering Wheel Modules, Driver 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: Left Side Impact, Roof Rail, and Steering Wheel Modules, Driver Seat Belt Pretensioner Wiring Schematic