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

PCM, Horn, and Evaporative Emissions Canister Vent Solenoid


Object Number: 291935  Size: LF
(1)Powertrain Control Module (PCM)
(2)Front Impact Bar
(3)Horn
(4)Evaporative Emissions Canister Vent Solenoid
Figure 2:

Multifunction Alarm Module and Horn Relay Connectors


Object Number: 292111  Size: LF
(1)Convenience Center
(2)Multifunction Alarm Module Connector
(3)Horn Relay