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

Below the Left of the Instrument Panel


Object Number: 321370  Size: LF
(1)Steering Column
(2)Steering Wheel Position Sensor
Figure 2:

Passenger Compartment, at the Base of the Steering Column


Object Number: 321372  Size: LF
(1)Headlamp Dimmer Switch
(2)Ignition Switch
(3)Shift Interlock Actuator (w/ Column Shift) (Hidden)
(4)Lower Steering Column Bracket
(5)Steering Column