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

Power and Headlamp Switch


Object Number: 538438  Size: FS
Lighting Systems Component Views
Exterior Lights Circuit Description
FR PRK LPS, LR PRK LP, RR PRK LP, and TRL PRK LP Fuses
PARK LP, FR PRK, LR PRK, RR PRK, and TRL PRK Fuses
B+ Bus Bar
Power and Grounding Connector End Views
ILLUM and PARK LP Fuses
PARK LP, FR PRK, LR PRK, RR PRK, and TRL PRK Fuses
Power, Headlamp Switch, and Multifunction Switch
G117
PARK LP, FR PRK, LR PRK, RR PRK, and TRL PRK Fuses
FR PRK LPS, LR PRK LP, RR PRK LP, and TRL PRK LP Fuses
Handling ESD Sensitive Parts Notice
Figure 2:

FR PRK LPS, LR PRK LP, RR PRK LP, and TRL PRK LP Fuses


Object Number: 538441  Size: FS
Lighting Systems Component Views
Exterior Lights Circuit Description
Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses
Power and Headlamp Switch
Power and Headlamp Switch
PARK LP, FR PRK, LR PRK, RR PRK, and TRL PRK Fuses
Power and Grounding Connector End Views
G111 and G112
G111 and G112
G111 and G112
S313 and S419
G450
S320 and S420
G402 and G420
Figure 3:

Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses


Object Number: 538445  Size: FS
Lighting Systems Component Views
Exterior Lights Circuit Description
Hazard Switch, TURN, and HAZ LP Fuses
FR PRK LPS, LR PRK LP, RR PRK LP, and TRL PRK LP Fuses
Hazard Switch, TURN, and HAZ LP Fuses
Instrument Cluster, LT TURN and RT TURN Fuses
Power and Grounding Connector End Views
G450
G111 and G112
G111 and G112
Figure 4:

Hazard Switch, TURN, and HAZ LP Fuses


Object Number: 538487  Size: FS
Lighting Systems Component Views
Exterior Lights Circuit Description
STOP LP, VEH HMSL, and TRL HMSL Fuses
Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses
Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses
Instrument Cluster, LT TURN and RT TURN Fuses
Ign START, RUN and ACC Bus Bar
Power and Grounding Connector End Views
G111 and G112
G111 and G112
G450
Power
G200 and G201
Hazard Switch, Radio, Instrument Cluster and Ground
SP203
Figure 5:

STOP LP, VEH HMSL, and TRL HMSL Fuses


Object Number: 538478  Size: FS
Lighting Systems Component Views
Exterior Lights Circuit Description
Hazard Switch, TURN, and HAZ LP Fuses
B+ Bus Bar
Power and Grounding Connector End Views
Cruise Control Schematic
G450
G450