GM Service Manual Online
For 1990-2009 cars only

Luggage Compartment Description and Operation for Pontiac Grand Prix 2008

Rear Compartment Lid Release

The rear compartment lid can be released by holding either front power door lock switch to the unlock position for a minimum of 2 seconds or by pressing the rear compartment release button on the key fob. The transmission must be in the PARK position for the rear compartment to release.