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

Valve Controls and Switch Inputs


Object Number: 1244086  Size: FS
Master Electrical Component List
Transmission Component and System Description
Tow/Haul and Park/Neutral Position Switch Inputs and Vehicle Speed Sensor
OBD II Symbol Description Notice
Crank, IGN 0, TBC ACC, FR WPR, BRKS and HVAC Fuses
Crank, IGN 0, TBC ACC, FR WPR, BRKS and HVAC Fuses
Figure 2:

Tow/Haul and Park/Neutral Position Switch Inputs and Vehicle Speed Sensor


Object Number: 1244174  Size: FS
Master Electrical Component List
Transmission Component and System Description
Valve Controls and Switch Inputs
OBD II Symbol Description Notice
Data Link Connector (DLC)
I/P Dimming Supply Voltage 1 of 3 and LED Dimming Supply Voltage
G302
G102