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

Stop Lamp Switch and Valve Controls


Object Number: 896376  Size: FS
Master Electrical Component List
Transmission Component and System Description
Switch Inputs and PNP Switch
OBD II Symbol Description Notice
Ignition Switch - ACC/RUN and RUN Bus Bars
BRAKE, CRUISE, and HTR-A/C Fuses
TRANS, and WINDOWS Circuit Breaker
Cruise Control Schematics
EBCM Power, Ground, and DLC
Figure 2:

Switch Inputs and PNP Switch


Object Number: 896377  Size: FS
Master Electrical Component List
Transmission Component and System Description
Tow/Haul Switch and VSS Inputs
Stop Lamp Switch and Valve Controls
OBD II Symbol Description Notice
G105 and G107
Figure 3:

Tow/Haul Switch and VSS Inputs


Object Number: 896380  Size: FS
Master Electrical Component List
Transmission Component and System Description
Switch Inputs and PNP Switch
OBD II Symbol Description Notice
Automatic Transmission Schematic Icons
G110 - Page 1 of 2
G100, G106, and G302