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

Park Lamp Relay


Object Number: 1625363  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Marker and Front Park Lamps
B+ Bus - Rear Fuse Block
Headlamp Switch
G102
Figure 2:

Marker and Front Park Lamps


Object Number: 1625365  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Rear Park, Marker, and License Lamps
Park Lamp Relay
FRT PRK, LGM #2, LR PRK, RR PRK, TRLR PRK Fuses and REAR WPR Circuit Breaker
Park Lamp Relay
Left Turn Signal
G104, G105 and G107
G101, G103, G106, and G110
Right Turn Signal
Figure 3:

Rear Park, Marker, and License Lamps


Object Number: 1625366  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Stop Lamps
Marker and Front Park Lamps
G401, G402, and G403
G401, G402, and G403
G401, G402, and G403
Park Lamp Relay
Figure 4:

Stop Lamps


Object Number: 1625367  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Turn Signal Lamps Controls
Rear Park, Marker, and License Lamps
B+ Bus - Underhood Fuse Block - 1 of 2
G401, G402, and G403
G401, G402, and G403
G401, G402, and G403
Trailer Wiring
Figure 5:

Turn Signal Lamps Controls


Object Number: 1625368  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Left Turn Signal
Stop Lamps
B+ Bus - Underhood Fuse Block - 2 of 2
ENG I, INJA, INJB, O2 SNSR A, and O2 SNSR B Fuses - 5.3L
ENG I, INJA, INJB, O2 SNSR A, and O2 SNSR B Fuses - 5.3L
BCK/UP, BTSI, IGN E, and TRLR BCK/UP Fuses
Indicators and DIC Controls
G201 - 1 of 2
B+ Bus - Underhood Fuse Block - 1 of 2
Figure 6:

Left Turn Signals


Object Number: 1625369  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Right Turn Signal
Turn Signal Lamps Controls
G401, G402, and G403
Marker and Front Park Lamps
G104, G105 and G107
Figure 7:

Right Turn Signals


Object Number: 1625370  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Backup Lamps
Left Turn Signal
Marker and Front Park Lamps
G101, G103, G106, and G110
G401, G402, and G403
Figure 8:

Backup Lamps


Object Number: 1625371  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Trailer Wiring
Right Turn Signal
B+ Bus - Rear Fuse Block
G401, G402, and G403
G401, G402, and G403
SP 205
Figure 9:

Trailer Wiring


Object Number: 1625373  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Backup Lamps
ABS, ATC, BLWR, ECAS, ELEC BRK, HAZRD, IPC/DIC, LTR, STOP LAMP, TRLR, VEH CHMSL, VEH STOP, and VSES Fuses
Stop Lamps
G201 - 1 of 2
G104, G105 and G107
G104, G105 and G107
BCK/UP, BTSI, IGN E, and TRLR BCK/UP Fuses
B+ Bus - Underhood Fuse Block - 2 of 2
BCK/UP, BTSI, IGN E, and TRLR BCK/UP Fuses
BCK/UP, BTSI, IGN E, and TRLR BCK/UP Fuses
B+ Bus - Rear Fuse Block
G201 - 2 of 2 and G305