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

Ignition Switch, Seat Belt, and Door Ajar Inputs


Object Number: 1504241  Size: FS
Master Electrical Component List
Audible Warnings Description and Operation
Communications, Theft Deterrent, and Engine Cooling
Brake Warning System Schematics
Fog Lights Schematics
Turn Signal and Hazard Switch
Power and Dome Lamps
Data Link Connector (DLC) Schematics
SP202
Seat Belts Schematics
Door Ajar Lamps
Washer Level Sensor
Door Ajar Lamps
Figure 2:

Communications, Theft Deterrent, and Engine Cooling


Object Number: 784248  Size: FS
Master Electrical Component List
Audible Warnings Description and Operation
Ignition Switch, Seat Belt, and Door Ajar Inputs
Headlights
Power, Grounds, and Park Lamp Relay
Theft Deterrent System Schematics
Low Coolant Indicator