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

Floor Shifter Harness Connections


Object Number: 357184  Size: MF
(1)Brake Transmission Shift Interlock (BTSI) Solenoid and Connector
(2)Brake Transmission Shift Interlock (BTSI) Connector
(3)Floor Shifter
(4)Park Switch and Connector
Figure 2:

SIR Steering Wheel Module and Coil


Object Number: 357153  Size: MF
(1)Multifunction Switch
(2)Horn Switch
(3)Supplemental Inflatable Restraint Steering Wheel