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

Turn Signal Switch and Hazard Flasher Module Inputs


Object Number: 397771  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
Park Lamp Relay
IGN-1, VENT SOL and SIR Fuse (Rear Fuse Block)
IGN-1, VENT SOL and SIR Fuse (Rear Fuse Block)
IGN-1, VENT SOL and SIR Fuse (Rear Fuse Block)
PWR, GND, Stoplamp Switch, Solenoid Valves, and Pump Motor
CCM, PCM Controls and Vehicle Speed Input
Handling ESD Sensitive Parts Notice
G201
G200 (1 of 2)
G200 (1 of 2)
G201
G401 (1 of 2)
License, Under Hood, and Cornering Lamps
Figure 2:

Park Lamp Relay


Object Number: 397788  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
RH Exterior Lamps
Turn Signal Switch and Hazard Flasher Module Inputs
Handling ESD Sensitive Parts Notice
Low Beam Headlamps
License, Under Hood, and Cornering Lamps
RH Exterior Lamps
LH Exterior Lamps
Figure 3:

RH Exterior Lamps


Object Number: 397784  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
LH Exterior Lamps
Park Lamp Relay
Handling ESD Sensitive Parts Notice
Park Lamp Relay
G103
G401 (1 of 2)
G401 (1 of 2)
Handling ESD Sensitive Parts Notice
220 Cell 83: Head Up Display
Figure 4:

LH Exterior Lamps


Object Number: 397777  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
License, Under Hood, and Cornering Lamps
RH Exterior Lamps
Handling ESD Sensitive Parts Notice
Park Lamp Relay
G103
G401 (1 of 2)
G402
220 Cell 83: Head Up Display
G401 (1 of 2)
Handling ESD Sensitive Parts Notice
Figure 5:

License, UnderHood, and Cornering Lamps


Object Number: 397791  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
LH Exterior Lamps
Park Lamp Relay
Handling ESD Sensitive Parts Notice
Turn Signal Switch and Hazard Flasher Module Inputs
Handling ESD Sensitive Parts Notice
G401 (2 of 2)
G103
G401 (1 of 2)
G401 (1 of 2)
G101, G106, and G107
G401 (2 of 2)
G103