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

Steering Wheel Controls


Object Number: 1891887  Size: FS
Master Electrical Component List
Cruise Control Description and Operation
Control Module References
Brake Pedal Position Sensor and Stop Lamp Switch Signal
Figure 2:

Brake Pedal Position Sensor and Stop Lamp Switch Signal


Object Number: 1891892  Size: FS
Master Electrical Component List
Cruise Control Description and Operation
Control Module References
Steering Wheel Controls