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

Transmission Range Switch


Object Number: 674799  Size: FS
Master Electrical Component List
Transmission General Information
Four Wheel Drive Switch, Putput Shaft Speed Sensor, Input Shaft Speed Sensor, Torque Converter Clutch (TCC) Solenoid
OBD II Symbol Description Notice
TURN, WIP Fuses
HAZ, D/L, TAIL, STOP, DOME Fuses
HAZ, D/L, TAIL, STOP, DOME Fuses
Electronic Brake Control Module (EBCM), Brake Indicator, 4WD Indicator, Stoplamp Switch, Brake Fluid Level Switch
Stop Lamp Switch, Cruise Control Servo
Shiftlock Control with Cruise Control
Stop Lamp Switch, Stoplamps
Backup Lamps, Backup Lamp Switch, Transmission Range Switch
Figure 2:

Shift Solenoids and Speed Sensors


Object Number: 674820  Size: FS
Master Electrical Component List
Transmission General Information
Shift Program Switch, Overdrive Switch
Transmission Range Switch
OBD II Symbol Description Notice
G201
G201
Figure 3:

Overdrive and Shift Program Switches


Object Number: 674826  Size: FS
Master Electrical Component List
Transmission General Information
Four Wheel Drive Switch, Putput Shaft Speed Sensor, Input Shaft Speed Sensor, Torque Converter Clutch (TCC) Solenoid
OBD II Symbol Description Notice
Power, O/D OFF, 4WD, MIL, CRUISE, Charge Indicators
TURN, WIP Fuses
IG Fuse
G201
G201