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

Immobilizer


Object Number: 1657491  Size: MF
(1)Immobilizer
Figure 2:

Theft Deterent/Keyless Entry Module


Object Number: 1657517  Size: LF
(1)Detection Coil
(2)Theft Deterent/Keyless Entry Module
Figure 3:

Theft Deterrent Alarm


Object Number: 1487936  Size: MF
(1)Theft Deterrent Alarm
Figure 4:

Hood Ajar Switch


Object Number: 1487944  Size: MF
(1)Hood Ajar Switch
Figure 5:

Liftgate Ajar Switch


Object Number: 1487941  Size: MF
(1)Liftgate Ajar Switch