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

3-Spoke


Object Number: 1788538  Size: FS
Master Electrical Component List
Steering Wheel Controls Description and Operation
Control Module References
4 Spoke
Underhood Fuse Block IBCM (RUN/CRANK), BCM AIRBAG (IGN), EPS and RUN/CRANK Fuses
Secondary/Configurable Control Schematic Icons
Steering Wheel Controls - 3 Spoke
Steering Wheel and Doors
Steering Wheel and Doors
Redundant Radio Controls - 3 Spoke
G201
Secondary/Configurable Control Schematic Icons
G201
Figure 2:

4-Spoke


Object Number: 1788546  Size: FS
Master Electrical Component List
Steering Wheel Controls Description and Operation
Control Module References
3 Spoke
Underhood Fuse Block IBCM (RUN/CRANK), BCM AIRBAG (IGN), EPS and RUN/CRANK Fuses
Secondary/Configurable Control Schematic Icons
Redundant Radio Controls - 4 Spoke
Steering Wheel and Doors
Steering Wheel and Doors
Steering Wheel Controls - 4 Spoke
Redundant Radio Controls - 4 Spoke
G201
Secondary/Configurable Control Schematic Icons
G201