Tools You'll Need:
* Spark plug socket: The correct size (likely 5/8" or 13/16", double-check your owner's manual) with a swivel or universal joint. A deep well socket is highly recommended.
* Wrench: To loosen the spark plug wire connector.
* Ratchet: A short ratchet will be easier to maneuver in tight spaces.
* Extension: One or more extensions to reach the spark plug. Flexible extensions are helpful.
* Penetrating oil (like PB Blaster): Highly recommended to soak the plug before attempting removal.
* Gloves: Protect your hands.
* Shop rags or paper towels: To clean up any oil or grease.
* New spark plug: Make sure it's the correct type for your engine. Consult your owner's manual.
* Optional: Spark plug gap tool: To ensure the new plug is gapped correctly.
Steps:
1. Safety First: Disconnect the negative terminal from your battery. This prevents accidental shorts.
2. Preparation: Locate the middle driver's side spark plug. It's usually tucked in toward the firewall. Apply penetrating oil to the plug well in advance (at least 30 minutes, preferably overnight).
3. Access: This is the hardest part. You'll likely need to work from several angles:
* From above: This might be possible with enough dexterity. Use the extensions and swivel socket to reach down.
* From the wheel well: Remove the plastic wheel well liner (some fasteners might need to be removed). This provides better access from the side. You might need to partially lower the suspension for extra room (consult a repair manual for this).
* From underneath: Jack up the vehicle, support it securely on jack stands, and work from underneath. This provides the best access for some people, especially if you are able to get a good angle.
4. Remove the Spark Plug Wire: Gently pull the spark plug wire connector straight off the spark plug. Don't pull on the wire itself, only the connector.
5. Remove the Spark Plug: Using your ratchet and spark plug socket, carefully remove the spark plug. Go slowly and apply steady pressure. If it's seized, apply more penetrating oil and let it sit. Avoid using excessive force, as you risk damaging the threads or cracking the spark plug.
6. Clean the Area: Clean out any debris or old oil from the spark plug well.
7. Install the New Spark Plug: Install the new spark plug by hand until it's snug. Then tighten it with the spark plug socket and ratchet according to the manufacturer's torque specifications (found in your owner's manual or a repair manual). Do not overtighten.
8. Reconnect the Spark Plug Wire: Securely reattach the spark plug wire connector.
9. Reassembly: Reinstall the wheel well liner (if you removed it).
10. Lower the Vehicle: If you raised the vehicle, lower it carefully.
11. Reconnect the Battery: Reconnect the negative battery terminal.
Important Considerations:
* Repair Manual: A repair manual specific to your 2001 Chevy Blazer is highly recommended. It will provide detailed diagrams and torque specifications.
* Patience: This job requires patience and persistence. Don't rush it.
* Professional Help: If you're uncomfortable performing this task, take your vehicle to a qualified mechanic. Damaging the threads in the cylinder head is a costly repair.
Remember to always prioritize safety. If you're not comfortable working on your vehicle, don't hesitate to seek professional help.
