If you look at the wiring diagram for the power tailgate lock circuit here
http://ss.lencolab.com/
and you have a battery pack & knife to get to the harness & wire
you might be able to pop it without damage
(to your thumb...hand...wrist....or whateva you'll end up hitting with that BFH..
)
ASS uming it HAS a power tailgate lock...
Any NON-impala info I regurgitate must be taken at face value