CTS V8-5.7L VIN P (2004)
Power Trunk / Liftgate Lock Switch: Description and Operation
REAR COMPARTMENT LID RELEASE
The rear compartment lid can be released by operating the rear compartment lid release switch or pressing the rear compartment release button on the
key fob. The transmission must be in the PARK position for the rear compartment to release.
When the rear compartment lid release switch is operated battery voltage is switched to the rear compartment lid lock release actuator solenoid.