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

3-Spoke


Object Number: 1707900  Size: FS
Master Electrical Component List
Steering Wheel Controls Description and Operation
Control Module References
4-Spoke
B+ Bussing
Steering Wheel and Column Schematic Icons
Steering Wheel Controls - 3 Spoke
Switches
Switches
Switches
Switches
G201
Steering Wheel and Column Schematic Icons
Figure 2:

4-Spoke


Object Number: 1707949  Size: FS
Master Electrical Component List
Steering Wheel Controls Description and Operation
Control Module References
3-Spoke
B+ Bussing
Steering Wheel and Column Schematic Icons
Steering Wheel Controls - 3 Spoke
Switches
Switches
G201
Steering Wheel and Column Schematic Icons
G201