GM Service Manual Online
For 1990-2009 cars only

Figure 1:

Valve Controls and Brake Switch


Object Number: 845547  Size: FS
Master Electrical Component List
Electronic Component Description
Switch Inputs
Automatic Transmission Schematic Icons
Ignition, Run and Start Bus Bar
Ignition, Run, Start, Accy Bus Bar
BRAKE, HTR/AC, HVAC I, CRUISE, 4WD
IGN 0, TBC IGN 0, TBC ACCY, SEO ACCY, WS WIPER, RR WIPER
Stoplamp Switch and Traction Control Switch
Figure 2:

Switch Inputs


Object Number: 845548  Size: FS
Master Electrical Component List
Electronic Component Description
Tow/Haul Switch and PNP Switch Inputs
Valve Controls and Brake Switch
Automatic Transmission Schematic Icons
Figure 3:

Tow/Haul Switch and PNP Switch Inputs


Object Number: 845549  Size: FS
Master Electrical Component List
Electronic Component Description
Vehicle Speed Signal and 4WD Low Signal
Switch Inputs
Automatic Transmission Schematic Icons
SP205 - 2 of 2
G102, G103
G203 - 1 Of 2
G203 - 1 Of 2
Figure 4:

Vehicle Speed Signal and 4WD Low Signal


Object Number: 845550  Size: FS
Master Electrical Component List
Electronic Component Description
Tow/Haul Switch and PNP Switch Inputs
Automatic Transmission Schematic Icons