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

Ambient Light Sensor, Brake Pedal Position Sensor, Hazard Switch and Turn Signal/Multifunction Switch


Object Number: 1786982  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Turn Signals and Stop Lamps
Low Speed Serial Data
Power, Ground and High Speed Serial Data
Air Temperature and Mode Controls
Headlights/Daytime Running Lights (DRL) Schematics
Displays
G201
G203
Figure 2:

Turn Signals and Stop Lamps


Object Number: 1787043  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Park Lamps
Ambient Light Sensor, Brake Pedal Position Sensor, Hazard Switch and Turn Signal/Multifunction Switch
G109
G101 and G102
G401 and G403
G302
G101 and G102
G101 and G102
G401 and G403
G401 and G403
G302
G109
Figure 3:

Park Lamps


Object Number: 1787049  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Backup Lamps and License Lamps
Turn Signals and Stop Lamps
Underhood Fuse Block RBEC 2, RUN RLY, Body Control Module (BCM), HVAC BLOWER HIGH Relay, RUN Relay, HVAC BLOWER, HVAC CTRL (IGN) Rear Fuse Block FUEL/PMP Relay, PARK LP Relay, TRUNK Relay, DRV ST
Backup Lamps and License Lamps
G101 and G102
G101 and G102
G101 and G102
G401 and G403
G401 and G403
Figure 4:

Backup Lamps and License Lamps


Object Number: 1787054  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Park Lamps
Park Lamps
Underhood Fuse Block RBEC 1 and Rear Fuse Block AUX #2, BCK/UP LAMPS, CIG/AUX, HTD MIR, HTD SEAT, RKE/XM/DVD/UGD, RR DEFOG and S/ROOF Fuses
Inside Rearview Mirror Schematics
G304 and G305
G302
G304 and G305
G401 and G403
G401 and G403
G401 and G403