GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Below Driver Seat -- SIR Wiring


Object Number: 310047  Size: MF
(1)Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(2)Power Seat Electrical Connector
(3)Inflatable Restraint Sensing and Diagnostic Module (SDM)
(4)Instrument Panel Harness
Figure 2:

Center of the I/P -- Accessory Switches (Except 10 Series and Crew Cab)


Object Number: 310150  Size: MF
(1)Inflatable Restraint IP Module Disable Switch Connector (Except Crewcab)
(2)Accessory Switch Housing
(3)Inflatable Restraint IP Module Disable Switch (Except Crewcab)
(4)Instrument Panel
Figure 3:

Passenger Presence Components - Under Front Passenger Seat


Object Number: 899961  Size: MF
(1)Seat Horizontal Motor - Front Passenger (AN3)
(2)Inflatable Restraint Passenger Presence System (PPS) Module (AL0)
(3)Inflatable Restraint Passenger Presence System (PPS) Sensor (AL0)
(4)Seat Front Vertical Motor - Front Passenger (AN3)
(5)Seat Rear Vertical Motor - Front Passenger (AN3)
(6)C399
(7)Inflatable Restraint Seat Position Sensor - Right
(8)Seat Recliner Motor - Front Passenger (AN3)
Figure 4:

Passenger Presence Components - Side of Front Passenger Seat


Object Number: 899962  Size: MF
(1)Seat Back Cushion
(2)Seat Adjuster Switch - Front Passenger (AN3)
(3)Inflatable Restraint Passenger Seat Belt Tension Retractor Sensor Connector (AL0)
Figure 5:

Front End Sensors


Object Number: 349802  Size: LF
(1)Radiator Support
(1)Radiator Support
(2)Inflatable Restraint Front End Sensor (HVY), Left and Right Sensors Similiar (w/o HVY)
Figure 6:

Right Side of the I/P -- SIR Components


Object Number: 310155  Size: MF
(1)Inflatable Restraint IP Module
(2)Inflatable Restraint IP Module Connector at Module
(3)Instrument Panel Compartment Lamp
(4)Instrument Panel Compartment Lamp Connector
(5)Inflatable Restraint IP Module Connector with Tether
Figure 7:

Right Side Impact Sensor (HP2)


Object Number: 1501182  Size: LF
(1)Inflatable Restraint Side Impact Sensor - (SIS) Right
(2)Passenger Side Door
Figure 8:

Steering Wheel


Object Number: 349778  Size: LF
(1)Inflatable Restraint Steering Wheel Module
(2)Inflatable Restraint Steering Wheel Module Connector with Tether
(2)Inflatable Restraint Steering Wheel Module Connector with Tether
(3)Inflatable Restraint Steering Wheel Module Harness
(3)Inflatable Restraint Steering Wheel Module Harness