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

Turn Signal, Hazard Flasher Module Inputs


Object Number: 397827  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
Turn Signal Lamps
Handling ESD Sensitive Parts Notice
Battery Voltage to the Rear Fuse Block
Battery Voltage to the Rear Fuse Block
IGN-1 Relay, TRANS, DIS, OXY SEN, and IGN 1 Fuses (Underhood Fuse Block)
Instrument Panel and Console Dimming
G201 (1 of 3)
G201 (1 of 3)
Figure 2:

Turn Signal Lamps


Object Number: 397824  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
Stop Lamps
Turn Signal, Hazard Flasher Module Inputs
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
G402
G401 (2 of 2)
RH Park Lamps
G402
Turn Signal, Hazard Flasher Module Inputs
G401 (2 of 2)
G401 (2 of 2)
G103
G103
Figure 3:

Stop Lamps


Object Number: 397816  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
LH Park Lamps
Turn Signal Lamps
Cruise Control Switch, CCM Power and Grounds
LH Park Lamps
LH Park Lamps
RH Park Lamps
RH Park Lamps
G402
G401 (1 of 2)
G401 (2 of 2)
G401 (2 of 2)
PWR, GND, Stoplamp Switch, Solenoid Valves, and Pump Motor
Figure 4:

LH Park Lamps


Object Number: 397822  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
RH Park Lamps
Stop Lamps
License Plate Lamps, Park Lamp Relay
Stop Lamps
Turn Signal Lamps
G402
G402
G103
Figure 5:

RH Park Lamps


Object Number: 430380  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
License Plate Lamps, Park Lamp Relay
LH Park Lamps
License Plate Lamps, Park Lamp Relay
Turn Signal Lamps
Stop Lamps
G401 (2 of 2)
G401 (2 of 2)
G401 (2 of 2)
G401 (2 of 2)
Figure 6:

License Plate Lamps, Park Lamp Relay


Object Number: 397830  Size: FS
Lighting Systems Components
Exterior Lights Circuit Description
RH Park Lamps
RH Park Lamps
LH Park Lamps
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
G401 (2 of 2)
G401 (2 of 2)