Here's a breakdown of how to approach the problem:
1. Diagnose the Problem:
* Identify the symptom: Is the door not latching at all? Does it latch but easily open? Is there a problem with the handle or the locking mechanism? Knowing the exact problem helps narrow down the potential causes.
* Check the obvious: Look for any visible damage to the latch mechanism, the door handle, the striker plate (the metal piece on the door jamb the latch engages with), or the connecting linkages. Rust and corrosion are common culprits in older vehicles.
* Test the components: Try manually operating the latch mechanism from inside the door panel. If you can move the latch manually but the door handle doesn't work, the problem lies with the handle or its linkage. If the manual operation doesn't work, the issue is likely within the latch assembly itself.
2. Access the Latch Mechanism:
* Remove the interior door panel: This usually involves removing screws around the edges of the panel and possibly disconnecting some electrical connectors for the window, power locks, and speakers. Consult a repair manual specific to your van's conversion for precise instructions on door panel removal. Pictures are invaluable here.
* Carefully examine the latch: Once the panel is off, you'll have a clear view of the latch mechanism and the linkages connecting it to the handle.
3. Common Fixes:
* Lubricate: Often, a simple application of WD-40 (or a similar lubricant specifically designed for mechanisms) to the moving parts of the latch mechanism can solve the problem. Work the mechanism back and forth while lubricating.
* Adjust the striker plate: If the door doesn't latch securely, the striker plate might be slightly misaligned. You may be able to gently adjust its position using a screwdriver or wrench. However, be careful not to damage the striker plate or the door frame.
* Replace broken parts: If any parts of the latch mechanism are broken or severely worn, they will likely need to be replaced. This might involve replacing the entire latch assembly, the door handle, or individual linkages. You'll need to find replacement parts. A local auto parts store or an online retailer specializing in classic car parts may be your best bet. Provide them with your van's make, model, and year (and the conversion company if known) for accurate part identification.
* Tighten loose screws: Check for loose screws holding the latch assembly, the striker plate, or any linkage components. Tighten any loose screws.
* Address rust and corrosion: Clean away any rust and corrosion using a wire brush and rust remover. Apply a protective coating afterward to prevent further corrosion.
4. Reassembly:
* Once the repair is complete, carefully reassemble the door panel and reconnect any electrical connectors.
* Test the latch and door handle to make sure the repair was successful.
Important Considerations:
* Repair manual: A repair manual specific to your year and model of Chevy G20 conversion van will be invaluable. It will provide detailed diagrams and instructions. Online resources like Haynes or Chilton manuals can be helpful.
* Professional help: If you're uncomfortable working on car parts, it's always best to take your van to a qualified mechanic. This is especially true if the repair involves more complex mechanical issues.
Remember to take pictures throughout the disassembly process to aid in reassembly. Good luck!
