For 1990-2009 cars

# Steering Column Control Module

Master Electrical Component List
Body Control System Description and Operation (Steering Column Control Module)
Control Module References
Fuse Block - Rear
Fuse Block - Underhood F34 Fuse and Ignition Switch
Power, Ground, Class 2, and GM Low Speed Serial Data (CAN A)
Power Moding
Vehicle Communication and Interface Module (VCIM) - Right
Power, Ground, Class 2, and GM Low Speed Serial Data (CAN A)
G203, G204, and G205