WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Refer to illustrations to identify SIR connector terminals. See Fig 1 - Fig 5
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Fig 1: Identifying Sensing And Diagnostic Module (SDM) Terminals
Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying Driver-side & Passenger-side Air Bag Module Connector Terminals