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

Valve Controls and Brake Switch


Object Number: 770460  Size: FS
Master Electrical Component List
Automatic Transmission Electrical Connector Description
Switch Inputs
OBD II Symbol Description Notice
BRAKE, Cruise, HTR A/C, RR WPR, WS WPR, and SEO ACCY Fuses
IGN 1, TURN, SEO IGN, AIR BAG, CRANK, and IGN 0 Fuses
Cruise Control Module , Clutch Start Switch, and Stop Lamp Switch - Gas w/o ETC
Power, Ground, Class 2 Communication (w/o Traction Assist)
Figure 2:

Switch Inputs


Object Number: 770461  Size: FS
Master Electrical Component List
Automatic Transmission Electrical Connector Description
Tow/Haul Switch and PNP Switch Inputs
Valve Controls and Brake Switch
OBD II Symbol Description Notice
Engine Data Sensors - Pressure and Temperature
Figure 3:

Tow/Haul Switch and PNP Switch Inputs


Object Number: 770463  Size: FS
Master Electrical Component List
Automatic Transmission Electrical Connector Description
Vehicle Speed Signal and 4WD Low Signal
Switch Inputs
OBD II Symbol Description Notice
Splice Pack SP205
G203 - 2 of 3 - Base Except Crew Cab
G203 - 2 of 3 - Base Except Crew Cab
G203 - 1 of 3
G103 and G105 - Gas
Figure 4:

Vehicle Speed Signal and 4WD Low Signal


Object Number: 770466  Size: FS
Master Electrical Component List
Automatic Transmission Electrical Connector Description
Tow/Haul Switch and PNP Switch Inputs
OBD II Symbol Description Notice