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

Steering Column


Object Number: 900962  Size: MF
(1)Ignition Switch
(2)Passlock Sensor
(3)Ignition Key Alarm Switch
(4)Ignition Lock Cylinder Control Actuator (M32 Only)
(5)Steering Column
Figure 2:

Left Side of I/P


Object Number: 1291221  Size: LF
(1)Turn Signal/Multifunction Switch
(2)Hazard Switch
(3)Horn Switch
(4)Steering Wheel Controls - Right
(5)Steering Wheel Controls - Left
(6)Data Link Connector (DLC)
(7)Headlamp Switch