GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2007 🢒 Terraza 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Interior Lights Dimming Schematics
Figure 1:

Control, I/P, Passenger Door, and Steering Wheel Lamps
Object Number: 1740109 Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Control Module References
Left Door, Right B-Pillar, and Roof Lamps
Charging
Park, Marker, and License Lamps
Headlights
Switches
Left Door, Right B-Pillar, and Roof Lamps
Left Door, Right B-Pillar, and Roof Lamps
Driver Inputs, Indicators
Backup Lamps
Messages
Lighting Systems Schematic Icons
G200 - 1 of 2
G200 - 2 of 2
G200 - 1 of 2
G302 - 1 of 2
G201
Figure 2:

Left Door, Right B-Pillar, and Roof Lamps
Object Number: 1740110 Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Control Module References
Control, I/P, Passenger Door, and Steering Wheel Lamps
Control, I/P, Passenger Door, and Steering Wheel Lamps
Switches
Power Mirrors
G301
Rear Quarter Windows
Object Detection Schematics
Right Door Controls
G302 - 2 of 2
G301
G302 - 1 of 2