GM Service Manual Online
For 1990-2009 cars only
Makes šŸ¢’ Chevrolet šŸ¢’ 1998 šŸ¢’ Chevy Suburban - 2WD šŸ¢’ Body and Accessories šŸ¢’ Theft Deterrent šŸ¢’ Theft Deterrent System Component Views
Figure 1:

Electronic Variable Orifice (EVO)/Passlockā„¢ Module
Object Number: 277987 Size: MF
(1)EVO/Passlockā„¢ Module
Figure 2:

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