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

Under Center Console


Object Number: 329095  Size: LF
(1)A/T Shift Lock Control Solenoid
(2)Shift Indicator Lamp
Figure 2:

Top of the Transmission


Object Number: 1288661  Size: LF
(1)Park/Neutral Position (PNP) Switch