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: 1787560  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Turn Signals and Stop Lamps
Low Speed GMLAN Serial Data (1 of 2)
Power, Ground, High Speed GMLAN Serial Data
Headlights and Daytime Running Lights (DRL) Schematics
G201
Dimmer Switch Inputs
G203
Figure 2:

Turn Signals and Stop Lamps


Object Number: 1787566  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/Malfunction Switch
Underhood Fuse Block B+
MAF, VSS and Extended Brake Travel Switch
Transmission Solenoids (LE5)
MAF/IAT, MAP, ECT Sensors
MAF, VSS and Extended Brake Travel Switch
MAF/IAT, MAP, ECT Sensors
Shift Solenoids, TCC and TFT
Shift Solenoids, TCC, TFT, Transmission Fluid Pressure (LZ4)
G101 and G1012
G101 and G1012
G401 and G403
G401 and G403
G109
G302
Figure 3:

Park Lamps


Object Number: 1787569  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
License Lamps and Backup Lamps
Turn Signals and Stop Lamps
Underhood Fuse Block RBEC 2 Fuse and RUN RLY, BCM HVAC BLOWER HIGH and RUN Relays, HVAC BLOWER and HVAC CTRL (IGN) Fuses, Rear Fuse Block FUEL, PARK LPS and TRUNK Relays, DRV ST, EMISSION 2, FOLDING T
License Lamps and Backup Lamps
G101 and G1012
G101 and G1012
G101 and G1012
G101 and G1012
G101 and G1012
G401 and G403
G401 and G403
G401 and G403
G401 and G403
Figure 4:

License Lamps and Backup Lamps


Object Number: 1787570  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Park Lamps
Underhood Fuse Block RBEC 1 Fuse and Rear Fuse Block AUDIO AMP, BACK UP LP, CIG/AUX, FOLDING TOP LOGIC POWER HTD ST, RKE/XM/DVD/UGD, RR DEFOG and SUN RF Fuses and BACK UP LP and RR DEFOG Relays
Park Lamps
G401 and G403
G401 and G403