Before you start:
* Gather tools: You'll likely need a trim panel removal tool (plastic pry tool is best to avoid scratching), Phillips head screwdriver, possibly a Torx screwdriver (depending on the fasteners), and possibly a small flathead screwdriver.
Steps (General - Refer to a Repair Manual for Precise Details):
1. Remove the interior door panel: This is usually the first step. Start by removing the screws holding the panel in place. These are often located in the armrest area, around the door handle, and sometimes hidden under the door pull. Use a trim tool to carefully pry the panel away from the door, working your way around the edges. The panel is likely clipped on, so gentle prying is essential. There are likely plastic clips holding the panel, be careful not to break these.
2. Locate the interior door handle mechanism: Once the panel is removed, you'll see the interior door handle mechanism. It's usually attached to the door with several screws or bolts.
3. Disconnect the linkage: The interior handle is connected to the locking mechanism by a linkage rod or cable. You need to disconnect this before removing the handle assembly itself. This often involves removing a clip or a small bolt securing the linkage.
4. Remove the screws holding the handle assembly: Unscrew the screws holding the interior door handle assembly in place. These are usually accessible once the linkage is disconnected.
5. Remove the handle assembly: Carefully remove the entire handle assembly.
Important Considerations:
* Take pictures: Before you start, take pictures of the process. This will be immensely helpful during reassembly.
* Be gentle: Plastic clips and parts can break easily. Use the trim tool carefully and avoid excessive force.
* Repair Manual: A repair manual specific to your 1999 GMC Safari is invaluable. It will provide detailed diagrams and instructions for your exact model. Don't skip this step!
If you're not comfortable doing this yourself, take it to a mechanic. Replacing a door handle might seem simple, but improperly removing or reinstalling parts can cause further damage.