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

Transmission Solenoids and VSS


Object Number: 1500972  Size: FS
Master Electrical Component List
Electronic Component Description
Control Module References
Transmission Switches, TFT and A/T ISS Sensor
OBD II Symbol Description Notice
B+ Bussing
Figure 2:

Transmission Switches, TFT and A/T ISS Sensor


Object Number: 1500973  Size: FS
Master Electrical Component List
Electronic Component Description
Control Module References
PNP Switch
Transmission Solenoids and VSS
OBD II Symbol Description Notice
Automatic Transmission Schematic Icons
Figure 3:

PNP Switch


Object Number: 1500975  Size: FS
Master Electrical Component List
Electronic Component Description
Control Module References
Tap Up/Tap Down
Transmission Switches, TFT and A/T ISS Sensor
OBD II Symbol Description Notice
G103, G104 and G105
Figure 4:

Tap Up/Tap Down Switch


Object Number: 1500981  Size: FS
Master Electrical Component List
Electronic Component Description
Control Module References
PNP Switch
OBD II Symbol Description Notice
Underhood Juction Block - Run Relay, Run/Crank ICBM, HVAC Blower, HVAC Head/ECC, EPS AIR BAG IGN, Run/Crank ELEC Fuses
Underhood Juction Block - Run Relay, Run/Crank ICBM, HVAC Blower, HVAC Head/ECC, EPS AIR BAG IGN, Run/Crank ELEC Fuses
Seats and Center Console
Shift Lock Control System
G303