GM Service Manual Online
For 1990-2009 cars only
Int. Trunk/Liftglass Sw.: The scan tool displays Active/Inactive. The BCM will display the state of the interior trunk release switch.

Trunk Release Solenoid Command: The scan tool displays ON/OFF. The trunk is released when commanded open.

Valet Switch: The scan tool displays Active/Inactive. The scan tool displays Active when the valet mode is on. Trunk release will be suspended when the valet mode is active.