Yea Im stumped, must have been something pretty clever.

you unfolded the clip and put in the gap between the glovebox and dash and pushed the button?

There must be a relay that you could jumper.

DING! DING! DING! DING! DING!

We have a winner... Too bad there'* no prize

Blownville & viper8907, you're both very very close as well!

Okay...

Remove the rear seat bottom.
Remove fuse block cover.
Remove Relay #52.
Short the CORRECT two cavities with a paperclip.
Watch with amazement as the trunk pops open.
Replace Relay, Cover and Seat.
Retrieve keys, carry on.

Thats pretty much what I meant, I was just too general, dang it! haha thats good thinking though!

Although I'm a little embarrassed to say, this is now the second time OnStar has saved my hide

wait, Onstar gave you that idea? That impressive if they did!

No, but they gave me access to my rear fuse block

Ahh, I guess i wasnt sure if the doors were even locked. and its not embarrasing, its just making your onstar subscription worthwhile.

Couldn't you just fold the seats down??

Oh wait a tick! You can't!!!

(just kidding, just kidding...)