SIR Schematics

WARNING: This page is about a different car, the 2005 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Power, Grounding, Serial Data, and Sensors Schematics

Courtesy of GENERAL MOTORS CORP.

Fig 2: Driver and Passenger Modules and Disable Switch Schematics

Courtesy of GENERAL MOTORS CORP.