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

Except Japan


Object Number: 1659009  Size: FS
Master Electrical Component List
Tire Pressure Monitor Description and Operation
Control Module References
Tire Pressure Monitoring Schematics - Japan
Class 2
GM LAN
Engine Data Sensors - Pressure Temperature, MAF, VSS and Brake Travel
GM LAN
Engine Data Sensors - ECT, MAP, MAF/IAT
Figure 2:

Japan


Object Number: 1480589  Size: FS
Master Electrical Component List
Tire Pressure Monitor Description and Operation
Control Module References
06 XLR Tire Pressure Monitoring Schematics - Except Japan
Wheel Speed Sensors
GM LAN
Class 2