GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Astro - 2WD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Theft Deterrent System Component Views
Figure 1:

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

Passlock Module
Object Number: 394394 Size: LF
(1)Passlock Module Connector
(2)Passlock Module