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

Class 2 Dimming Communication


Object Number: 662736  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Dimming Control
Class 2 Serial Data (1 of 3)
Figure 2:

Dimming Control


Object Number: 662742  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Instrument Panel Dimming
Class 2 Dimming Communication
HVAC Air Delivery/Temperature Control Sensors
Low Beam Headlamps (Export)
Low Beam Headlamps (Domestic)
Right PRK LP and Left PRK LP Fuses
DIMR and Audio Fuses
Figure 3:

Instrument Panel Dimming


Object Number: 662748  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Steering Wheel Controls
Dimming Control
G201 IP Harness and Console Harness
G201 IP Harness and Console Harness
G201,G202 CKT 451 Steering Column
G201,G202 CKT 451 Steering Column
Figure 4:

Steering Wheel Controls


Object Number: 662752  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Console Dimming
Instrument Panel Dimming
SIR Caution
G200
G200
Horns
G201,G202 CKT 451 Steering Column
G302 Left Front Seat
Figure 5:

Console Dimming


Object Number: 662757  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Front Door Dimming
Steering Wheel Controls
G201,G202 CKT 451 Steering Column
G201,G202 CKT 451 Steering Column
G201 IP Harness and Console Harness
G201 IP Harness and Console Harness
Figure 6:

Front Door Dimming


Object Number: 662764  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Middle Door Dimming
Console Dimming
Figure 7:

Middle Door Dimming


Object Number: 662767  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Rear Door Dimming
Front Door Dimming
G201,G202 CKT 451 Steering Column
G302 Left Front Seat
Figure 8:

Rear Door Dimming


Object Number: 662770  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Middle Door Dimming
G302 Right Front Seat
G302 Right Front Seat
G302 Right Front Seat