Here's a breakdown:
Easy Scenarios (potentially DIY-able):
* Loose Handle: If the handle is just loose, it might only need tightening of screws or clips. This is the easiest fix.
* Broken Plastic Pieces (internal): Sometimes, a small plastic piece inside the handle breaks, causing it to malfunction. Replacing this part might be straightforward if you can find a replacement and have some patience to disassemble and reassemble the door panel.
More Difficult Scenarios (potentially requiring professional help):
* Internal Linkage Broken: The handle is connected to the latch mechanism inside the door by a series of rods and linkages. If these are broken, you'll need to disassemble the door panel, potentially replace broken linkages, and reassemble everything. This requires more patience and dexterity.
* Handle Mechanism Completely Broken: If the handle itself is broken beyond repair, you'll need to replace the entire exterior door handle assembly. This still involves removing the door panel, but the process of swapping out the handle is generally easier than repairing internal linkage.
* Door Panel Damage: You *always* have to remove the inner door panel to access the handle mechanism. If the panel is damaged during removal, that adds to the difficulty and cost.
Before you start:
* YouTube is your friend: Search for "1996 Pontiac Grand Prix door handle replacement" on YouTube. Visual guides are invaluable for this type of repair.
* Gather tools: You'll likely need various screwdrivers (Phillips and possibly flathead), possibly a trim tool (to avoid scratching the panel), and possibly some pliers.
* Replacement parts: Find a replacement handle (or internal components) *before* you start disassembling anything.
In short: It's *possible* to do this yourself if you're mechanically inclined and patient. If you're uncomfortable with taking apart car parts or aren't sure what's broken, it's probably best to take it to a mechanic. The cost of labor might be less than the frustration of a botched DIY repair.
