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

Power, Ground, A/T Shift Lock Control, Audible Warnings, DLC, Engine Controls, RAP, Starting and Charging References


Object Number: 1803145  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
ABS, Body Rear End, Brake Warning System, Defogger, Driver Seat, Horns, Keyless Entry, Passenger Seat, Theft Deterrent and Wiper/Washer System References
Fuse Block - Underhood BATT MAIN 1 Fuse
Fuse Block - Underhood BATT MAIN 2 Fuse
Fuse Block-Underhood B+ Bus
Retained Accessory Power (RAP) Schematics
Data Link Connector (DLC) Schematics LY7
Data Link Connector Schematics L26
Ignition Switch
Module Power, Ground, Serial Data, and MIL
Module Power, Ground, Serial Data, and MIL
Shift Lock Control L26
Shift Lock Control LY7
Audible Warnings Schematics
Starting - L26
Starting - LY7
Charging
G201
G200
G301
Figure 2:

ABS, Release System, Brake Warning System, Defogger, Driver Seat, Horns, Passenger Seat, Theft Deterrent, Immobilizer, and Wiper/Washer System References


Object Number: 1803157  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Door/Lock Indicator, Fog Lights, Headlights/DRL, Interior Lights, OnStar and Rear Parking Assist References
Power, Ground, A/T Shift Lock Control, Audible Warnings, DLC, Engine Controls, RAP, Starting and Charging References
Content Theft Deterrent (CTD) System
Vehicle Theft Deterrent (VTD) System
Body Rear End
Horns Schematics
Data Active Brake and Stability
Hydraulic Brakes/Brake Warning System
Defogger
Driver Seat Heat Controls
Passenger Seat Heat Controls
Wiper/Washer Schematics
Figure 3:

Door/Lock Indicator, Fog Lights, Headlights/DRL, Interior Lights, OnStar and Rear Parking Assist References


Object Number: 1803160  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Exterior Lights and Interior Lights References
ABS, Body Rear End, Brake Warning System, Defogger, Driver Seat, Horns, Keyless Entry, Passenger Seat, Theft Deterrent and Wiper/Washer System References
Indicator Ajar Indicators
Lock Indicator Switches
Indicator Actuators
Headlights/Daytime Running Lights (DRL) Schematics
Cruise Control Schematics LY7
Cruise Control Schematics L26
Steering Wheel and Front Passenger Door Lighting
I/P, Console, and Driver Door Lighting
Object Detection Schematics
Exterior Lights and Interior Lights References
Figure 4:

Exterior Lights and Interior Lights References


Object Number: 1803166  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Door/Lock Indicator, Fog Lights, Headlights/DRL, Interior Lights, OnStar and Rear Parking Assist References
Lights Park Lamps
Turn Signal, Hazard and Stop Lamps Inputs
Turn Signal, Hazard and Stop Lamps Outputs
Shift and TCC Solenoid Valves, TFT Sensor, and Stop Lamp Switch (L26)
Shift Lock Control L26
Data Active Brake and Stability
Cruise Control Schematics L26
Cruise Control Schematics LY7
Turn Signal, Hazard and Stop Lamps Inputs
Backup and License Lamps
Door/Lock Indicator, Fog Lights, Headlights/DRL, Interior Lights, OnStar and Rear Parking Assist References
Lights Lamp Controls
Courtesy Lamps