GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Astro - 4WD 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 SIR Component Views
Figure 1:

SDM, IP Module, Discriminating Sensor
Object Number: 186930 Size: LF
(1)Radiator Core Support
(2)Inflatable Restraint Front End Discriminating Sensor
(3)Dash
(4)Inflatable Restraint I/P Module
(5)Inflatable Restraint I/P Module Connector
(6)SIR Wiring Harness
(7)Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(8)Inflatable Restraint Sensing and Diagnostic Module (SDM)
(9)Inflatable Restraint Steering Wheel Module
Figure 2:

Splice Pack, Relay Block, DLC Wiring
Object Number: 563307 Size: LF
(1)C201
(2)Inflatable Restraint Steering Wheel Module Coil Connector
(3)Data Link Connector (DLC)
(4)Relay Block #1
(5)S253
(6)S220
(7)S252
(8)S251
(9)S250
(10)SP261 Splice Pack