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

Power, Ground, Serial Data, and Controlled/Monitored Subsystem References


Object Number: 1775319  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Body Control Module Programming and Setup
Subsystem References to Theft, Horn, Seat Belt, Outside Mirror, Power Moding, Brake Warning, ABS, and Wiper/Washer
B+ Bus - Underhood Fuse Block
Data Communication Schematics
Shift Lock Control Schematics
Primary Blower and Air Delivery Controls
A/C, BLOWER, DOOR LOCK, HTD SEAT, ONSTAR, TBC, TURN/HAZ FR, and TURN/HAZ RR Fuses
Starting System - MA5
Starting System - M30
Ignition Switch and IGN TRANS D Fuse
Module Power, Ground, Serial Data, and MIL
Power, Ground, Serial Data, and MIL
Power Door Locks, Regular and Extended Cab
Power Door Locks - Crew Cab
G300, G301, and G302
Figure 2:

Subsystem References to Theft, Horn, Seat Belt, Outside Mirror, RAP, Brake Warning, ABS, and Wiper/Washer Systems


Object Number: 1775332  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Body Control Module Programming and Setup
Subsystem References to Interior Lights and Interior Lights Dimming Systems
Power, Ground, Serial Data, and Controlled/Monitored Subsystem Reference
Immobilzer Schematics
Horn Schematics
Outside Rearview Mirror Schematics
Power Moding Schematics
Hydraulic Brake Schematics
Traction Control
Windshield Wiper Motor and Windshield Washer Fluid Pump
Figure 3:

Subsystem References to Interior Light and Interior Lights Dimming Systems


Object Number: 1775464  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Body Control Module Programming and Setup
Lighting System Reference
Subsystem References to Theft, Horn, Seat Belt, Outside Mirror, Power Moding, Brake Warning, ABS, and Wiper/Washer
Inside Rearview Mirror, Dome Lamp, Footwell Lamps, and Cargo Lamp
Door Jamb Switches
Interior Lights Dimming Schematics
Figure 4:

Lighting System Reference


Object Number: 1775483  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Body Control Module Programming and Setup
Subsystem References to Interior Lights and Interior Lights Dimming Systems
w/o TT5
w/TT5
Fog Lights
Park Lamp Control, Turn Signal Inputs, and Hazard Switch
Turn Signal Lamps