* Check the interior release: Many hatchbacks have an interior release lever or button somewhere near the driver's seat or on the cargo area sidewall. Locate this and try it.
* Manual release cable (if accessible): Some vehicles have a cable that operates the hatch release. This is often hidden behind interior panels. You may need to remove a panel in the cargo area to access it. This requires some mechanical aptitude and might involve some disassembly. Refer to a repair manual or online resources specific to your 1998 Pontiac Transport to locate it (if it exists).
* External emergency release (unlikely, but check): While less common on hatchbacks of that era, there *might* be an emergency release mechanism somewhere on the exterior of the vehicle. Check carefully around the hatch itself and the surrounding body panels.
* Slim jim or similar tool: This is a last resort and carries a risk of damage. A slim jim or similar tool might be able to manipulate the latch mechanism, but it requires skill and caution to avoid scratching the paint or damaging the locking mechanism. This is not recommended unless you're experienced with this kind of repair.
If all else fails: You'll likely need professional help. A locksmith specializing in automobiles should be able to open the hatch without causing significant damage. They have specialized tools and expertise for this kind of situation.
Important Note: Before attempting any of these methods, especially those involving disassembly or the use of tools, consult a repair manual specific to your 1998 Pontiac Transport. This will help you avoid causing further damage and will provide valuable insight into the vehicle's locking mechanism.