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

Power, BCM, PCM, Class 2, Stop Lamp Switch, Tow/Haul Switch, and Shift Solenoids


Object Number: 1177403  Size: FS
Master Electrical Component List
Electronic Component Description
Fluid Pressure Switch, TFT Sensor, PC Solenoid Valve, Transfer Case Control Module, and Vehicle Speed Sensor
OBD II Symbol Description Notice
Illumination - Rear Windows, Garage Door Opener, Sunroof, HVAC Control, Headlamp, and Tow/Haul Switches
Power, Ground, DLC, and Splice Pack SP205
BRAKE, 4WD, CRUISE, HVAC 1, and IGN 3 Fuses
WS WPR, SEO ACCY, RR WPR, TBC ACCY, TBC IGN 0, and IGN 0 Fuses
WS WPR, SEO ACCY, RR WPR, TBC ACCY, TBC IGN 0, and IGN 0 Fuses
Power, Ground, DLC, and Splice Pack SP205
CKT 1050: G203, S302, S303, S351, and S215
Figure 2:

Fluid Pressure Control Switch, TFT Sensor, PC Solenoid Valve, Transfer Case Control Module, and Vehicle Speed Sensor


Object Number: 1177474  Size: FS
Master Electrical Component List
Electronic Component Description
Transmission Range Display
Power, BCM, PCM, Class 2, Stop Lamp Switch, Tow/Haul Switch, and Shift Solenoids
OBD II Symbol Description Notice
Automatic Transmission Schematic Icons
Figure 3:

Transmission Range Display


Object Number: 1177478  Size: FS
Master Electrical Component List
Electronic Component Description
Fluid Pressure Switch, TFT Sensor, PC Solenoid Valve, Transfer Case Control Module, and Vehicle Speed Sensor
G102 and G103
Power, Ground, DLC, and Splice Pack SP205