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

Passlock Sensor


Object Number: 394392  Size: SH
(1)Passlockā„¢ Lock Cylinder and Key Insert
(2)Passlockā„¢ Sensor and Ignition Switch Location
Figure 2:

Passlock/Electronic Variable Orifice (EVO) Module


Object Number: 394394  Size: LF
(1)Passlock/Electronic Variable Orifice (EVO) Module Connector
(2)Passlock/Electronic Variable Orifice (EVO) Module