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

Class 2 Dimming Communication


Object Number: 509909  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Dimming Control
Handling ESD Sensitive Parts Notice
Data Link Connector Schematics
Figure 2:

Dimming Control


Object Number: 509911  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Instrument Panel Dimming
Class 2 Dimming Communication
Handling ESD Sensitive Parts Notice
Sensors
Low Beam Headlamps
Low Beam Headlamps
Rear Fuse Block Battery Voltage
RH PRK LP and LH PRK LP Fuses
Instrument Panel Dimming
Figure 3:

Instrument Panel Dimming


Object Number: 509915  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Steering Wheel Controls
Dimming Control
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
G201 - Steering Column CKT 451
G201 - Steering Column CKT 451
G201 - IP Harness
G201 - IP Harness
Steering Wheel Controls
Dimming Control
Console Dimming
Figure 4:

Steering Wheel Controls


Object Number: 509913  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Console Dimming
Instrument Panel Dimming
G200
Horns Schematic
SIR Handling Caution
Instrument Panel Dimming
G200
G201-V4U/BQ9
G302-V4U/B9Q CKT 551
Figure 5:

Console Dimming


Object Number: 584991  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Front Door Dimming
Steering Wheel Controls
Instrument Panel Dimming
G201 - Console Harness
G201 - Console Harness
G201 - Console Harness
Figure 6:

Front Door Dimming


Object Number: 509917  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Middle Door Dimming
Console Dimming
Handling ESD Sensitive Parts Notice
Figure 7:

Middle Door Dimming


Object Number: 514306  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Rear Door Dimming
Front Door Dimming
Handling ESD Sensitive Parts Notice
G201-V4U/BQ9
Figure 8:

Rear Door Dimming


Object Number: 509919  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Middle Door Dimming
Handling ESD Sensitive Parts Notice
G302 - RH Front Seat
G302 - RH Front Seat