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

Power, Ground, and DLC


Object Number: 1757488  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Headlights/DRL and Exterior Lights References
Fuse Block - Underhood Bussing
BATT 3, STOP/B/U/LPS, BTSI SOL/COL LOCK, RADIO/ANT/VICS, PWR FLDG MIR - EXT/RET, REAR FOG/ALDL TOP SW, REVERSE LAMPS Fuses, AND STOP LAMP, REVERSE LAMP Relays
BATT 3, STOP/B/U/LPS, BTSI SOL/COL LOCK, RADIO/ANT/VICS, PWR FLDG MIR - EXT/RET, REAR FOG/ALDL TOP SW, REVERSE LAMPS Fuses, AND STOP LAMP, REVERSE LAMP Relays
Class 2
GMLAN
BATT 5, TILT/TELE/MEM SEAT MOD, ACCA/DRIV DR SW, IGNITION SW/INTR SENS, ONSTAR, PARK BRAKE SOL A Fuses, and PARK BRAKE RELEASE Relay
CLUSTER, A.C. LATCH/PK BRK B, DOOR LOCKS, INTERIOR LIGHTS, HVAC/PWR SND, ISRVM/HVAC, TUTD SW/STRG COL SW FUSES, and RUN/CRANK Relay 2
Ignition Mode Switch
G104 and G106
G202
Figure 2:

Headlights/DRL and Exterior Lights References


Object Number: 1757490  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Exterior Lights Continued, Interior Lights, and Fog Lights References
Power, Ground, and DLC
Headlamp/DRL Controls
Hazards and Park Lamp Control
BATT 3, STOP/B/U/LPS, BTSI SOL/COL LOCK, RADIO/ANT/VICS, PWR FLDG MIR - EXT/RET, REAR FOG/ALDL TOP SW, REVERSE LAMPS Fuses, AND STOP LAMP, REVERSE LAMP Relays
Headlamp/DRL Controls
Tail Lamps
Figure 3:

Exterior Lights Continued, Interior Lights, and Fog Lights References


Object Number: 1757492  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Other Subsystem References
Headlights/DRL and Exterior Lights References
Hazards and Park Lamp Control
Lamp Controls, and Courtesy, Underhood, I/P Compartment, Vanity Mirrors, Inside Rearview Mirror Lamps
Front Fog Lamps
Rear Fog Lamps - Europe
Figure 4:

Other Subsystem References


Object Number: 1757495  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Exterior Lights Continued, Interior Lights, and Fog Lights References
Actuators and Handle Switches
Content Theft Deterrent
Wiper Switch, Washers, and Outside Moisture Sensor
Power Moding Schematics
Column Lock Schematics
Horn Schematics
Fuel Door and Rear Compartment Lid Release
Power, Ground, DLC, and Non-Sensor Signals
Brake Pedal Signal and Traction Control Switch
Power, Ground, and Wiper Motor
Content Theft Deterrent
Park Brake System Schematics
Indicators, Messages, and Ajar/Open/Lock Switches