1. Check and Tighten Existing Hinge Bolts:
* Tools: Socket wrench with appropriate size sockets (likely 13mm or 15mm, but check your owner's manual or a repair manual for specifics), possibly a ratchet extension, and a flashlight.
* Procedure: Open the door fully. Carefully inspect all the hinge bolts on both the door and the body. There are usually three hinges per door. Use your socket wrench to tighten each bolt. Don't overtighten; just snug them securely. If some bolts are stripped or broken, proceed to step 2.
2. Replace Damaged or Stripped Hinge Bolts:
* Tools: Same as above, plus replacement bolts (get them from a parts store; specify your year, make, and model). You may also need a bolt extractor if bolts are severely stripped.
* Procedure: If you find stripped bolts, use a bolt extractor to remove them carefully. Install the new bolts, tightening them securely but not overtighten.
3. Check the Hinge Pins:
* Tools: Hammer (rubber mallet is best), punch (or a sturdy, appropriately sized screwdriver), and possibly a lubricant (like white lithium grease).
* Procedure: Some Blazer models have hinge pins that can loosen or become worn. It's rare but possible that the pin itself is the problem. You might need to carefully tap the hinge pin out (using the punch), clean it, and lubricate it before reinstalling. Reinstall the hinge pin and check if the looseness is solved. If you remove the pins, be aware of where they go and how they sit in the hinge.
4. Inspect the Door Striker:
* Tools: Screwdriver.
* Procedure: The striker is the metal plate on the door jamb that the door latch engages. Sometimes, this plate can become loose or misaligned, contributing to a loose-feeling door. Check if the striker is securely fastened and properly aligned with the door latch. Tighten the striker screws if necessary.
5. Check for Bent Hinges or Door Frame:
* Tools: Visual inspection. If you suspect something is bent, potentially a straight edge and a measurement tool for verification.
* Procedure: Carefully examine the hinges and the door frame for any signs of bending or damage. This is less likely, but a significant impact could bend something. Repair or replacement of hinges or a door frame would likely require professional help.
Important Considerations:
* Safety: Have someone help you hold the door while you're working on the hinges. A heavy door could unexpectedly fall and cause injury.
* Over-tightening: Avoid over-tightening bolts, as this can strip the threads or damage the hinges.
* Repair Manual: A repair manual specific to your 1998 Chevy Blazer would be incredibly helpful. It will provide diagrams and detailed instructions.
* Professional Help: If you're uncomfortable working on your vehicle, it's always best to take it to a qualified mechanic.
Start with the simplest solutions (tightening existing bolts) and work your way down the list. If none of these steps fix the problem, there might be a more serious issue requiring professional attention.
