Here's a breakdown of the process, assuming the problem is with the latch mechanism itself and not just a misaligned door or broken linkage:
1. Diagnose the Problem:
* Identify the specific issue: Is the door not latching at all? Does it latch sometimes but not others? Does the handle feel loose or unresponsive? Knowing the precise symptom will help narrow down the cause.
* Check the obvious: Ensure the door is properly aligned. A misaligned door can prevent the latch from engaging correctly. Check the door hinges for looseness or damage.
* Inspect the linkage: The inside door handle, the outside door handle, and the latch mechanism are all connected by a series of rods and linkages. Look for broken or bent components. Sometimes, these can be easily repaired or replaced.
* Test the actuator: The power door lock actuator (if equipped) might be faulty. Try locking and unlocking the door using the key fob or the interior switch. A malfunctioning actuator can prevent the latch from engaging.
2. Access the Latch Mechanism:
* Interior Panel Removal: You'll need to remove the interior door panel to access the latch mechanism. This usually involves removing screws, clips, and potentially disconnecting electrical connectors for power windows, door locks, and speakers. Consult a repair manual specific to your 2000 Chevy Blazer for detailed instructions. There are many online resources with videos showing this process.
* Locate the Latch: Once the panel is removed, you'll see the latch mechanism. It's usually a fairly substantial metal unit.
3. Repair or Replacement:
This is where things get more specific depending on your diagnosis:
* Broken Linkage: If a rod or linkage is broken, it may be possible to repair it with a replacement rod or by carefully welding or using appropriate adhesive (depending on the material).
* Faulty Latch Mechanism: If the latch itself is faulty, it may need to be replaced. You'll likely need to purchase a replacement latch assembly from a parts store (auto parts stores, online retailers) – be sure to specify your year and model of Blazer.
* Actuator Problems: A failing actuator may require replacement. These are often available separately.
* Stripped Bolts or Screws: Carefully remove any stripped bolts or screws. You might be able to repair them using bolt extractors or helicoils.
4. Reassembly:
Once the repair or replacement is complete, reassemble everything in reverse order of disassembly. Make sure all linkages are properly connected and adjusted. Reinstall the interior door panel, ensuring all clips and screws are securely fastened.
5. Testing:
After reassembly, thoroughly test the door latch to ensure it functions correctly.
Important Considerations:
* Repair Manual: A repair manual specific to your 2000 Chevy Blazer is highly recommended. It will provide detailed diagrams, instructions, and torque specifications.
* Parts: Have the necessary replacement parts on hand before you begin. Finding the correct parts for your specific model is crucial.
* Safety: Disconnect the battery's negative terminal before beginning any electrical work to prevent accidental short circuits.
* Tools: Gather the necessary tools, including screwdrivers (Phillips and flathead), possibly a socket set, pliers, and possibly a rivet gun (depending on the door panel fasteners).
Remember, this is a general overview. The specific steps involved will vary depending on the exact nature of the problem and your vehicle's configuration. If you're unsure about any step, consult a professional mechanic. Improper repair could lead to further damage or safety hazards.
