Here's what you can try:
* Rear Seat Access: Many sedans, including some Park Avenues, have a fold-down rear seat (either a split-fold or a pass-through). Check if the rear seats can be folded down to access the trunk. If so, you might be able to reach the trunk latch from inside the car.
* Check Owner's Manual: If you have access to a PDF of the 1996 Buick Park Avenue owner's manual (often found online), it *might* detail a procedure for accessing the trunk in this situation. While unlikely to describe a simple method, it's worth a look.
* Professional Help: If the rear seats don't provide access, your best bet is calling a locksmith specializing in automotive lockouts. They have tools and techniques to open car doors and trunks without causing damage. A tow truck service may also offer this service.
Important Considerations:
* Avoid Damage: Do not attempt to force or pry open the trunk. This can cause significant damage to the car's bodywork and locking mechanism.
* Security: Be mindful of your safety and the security of your vehicle while attempting to access the trunk. Avoid working in poorly lit areas.
In short, there isn't a simple "trick" to open the trunk in this scenario. The most reliable and least damaging approach is to get professional assistance.