[Baron Von Zeppelin]

Before you use any destroy methods on anything -
take the lock out of the glovebox door, and go to a locksmith.
(or take the whole glovebox door, stressing its value and fragility to the smith)

He can make you a key, and if history has been kind, it will also fit the trunk lock.
If trunk appears original - should have good results.

Another strategy is if you have the PHS Invoice - it will have the key code for trunk.
A smith "might" be able to cut from that code.
But prob have to go to a GM dealer (and hope they have an old blank) (maybe pick up a blank at Lowes Hardware or Walmart)