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

Below the Left Side of the IP, Near the Steering Column


Object Number: 264425  Size: LF
(1)IP Harness
(2)Engine Harness
(3)Powertrain Control Module Connectors
(4)Body Harness
(5)Rear Compartment Lid Release Switch
Figure 2:

Rear Compartment Lid


Object Number: 264455  Size: LF
(1)Rear Compartment Lid Release Actuator