1. Identify the Problem:
* Handle won't open the door: This could be a broken linkage, a problem with the latch mechanism, a worn-out actuator, or a binding mechanism.
* Handle feels loose or wobbly: The handle itself may be broken or poorly attached. Screws may be loose or stripped. Internal components might be worn.
* Handle is completely broken off: You'll likely need a replacement handle assembly.
* Interior handle doesn't work: Similar issues to the exterior handle, but potentially involving a different linkage mechanism.
2. Troubleshooting and Repair (Assuming the handle is still attached):
* Check for Loose Screws: Start by carefully inspecting the interior and exterior door panels around the handle. Tighten any loose screws. This is the easiest fix.
* Examine the Linkage: This requires removing the interior door panel. (Plenty of online guides show how to do this for your specific GMC model - search "1995 GMC Truck Interior Door Panel Removal"). Once removed, you can trace the linkage from the handle to the latch mechanism. Look for broken, bent, or disconnected rods or clips. Repair or replace as needed. You might find diagrams online with a parts breakdown to help you.
* Lubrication: Apply a penetrating lubricant (like WD-40 or PB Blaster) to any moving parts of the linkage. This might free up a stuck or binding mechanism. After lubrication, work the handle several times.
* Latch Mechanism: Inspect the latch mechanism itself for damage or wear. Sometimes a simple adjustment can solve the problem. Replacing the latch assembly might be necessary if it's severely damaged.
* Actuator (Power Locks): If your truck has power locks, the actuator might be faulty. Testing it with a multimeter may be necessary to determine if it's receiving power. Replacement is often the solution.
3. Replacement (If necessary):
* Source a Replacement Handle: You'll likely need to find a replacement door handle assembly. Junkyards, online retailers (like eBay or Amazon), and auto parts stores (like AutoZone, Advance Auto Parts, or NAPA) are good places to look. Make sure you get the correct one for your year and model.
* Installation: Replacing the handle involves removing the interior door panel (as mentioned earlier), disconnecting the old handle assembly, and installing the new one. Reverse the removal process for installation. Again, online guides are invaluable here. Pay attention to the linkage alignment.
Important Considerations:
* Safety First: Disconnect the negative battery terminal before working with any electrical components.
* Take Pictures: Before disassembling anything, take pictures so you can remember how everything goes back together.
* Online Resources: Search YouTube or other online forums for "1995 GMC Truck door handle repair." You'll likely find videos and detailed instructions from others who have tackled this repair. Be sure to specify the specific model of your truck (e.g., Sierra, Sonoma) as this can vary.
If you're not comfortable working on your truck yourself, it's always best to take it to a qualified mechanic. The cost of a professional repair might be worth avoiding potential damage or injury.