Safety First:
* Disconnect the negative battery terminal. This prevents sparks that could ignite fuel vapors.
* Work in a well-ventilated area. Fuel fumes are flammable and dangerous.
* Wear safety glasses and gloves. Fuel is messy and can irritate skin and eyes.
* Have rags or absorbent material readily available. Spills are likely.
* Have a wrench or socket set appropriate for your fuel lines.
Steps:
1. Locate the Fuel Filter: The fuel filter is usually located near the fuel tank, often along the frame rail. Consult your owner's manual for the precise location. It's typically a cylindrical canister.
2. Relief Pressure: Before disconnecting anything, you MUST relieve pressure in the fuel system. This is crucial to avoid spraying fuel everywhere. The method varies:
* Some Blazers have a schrader valve (similar to a tire valve) on the fuel rail. You can use a fuel pressure gauge or simply press a small, pointed object (like a small screwdriver) against the valve to release pressure slowly. Be ready for a little fuel spray.
* Others require you to start the engine and let it run until it stalls due to lack of fuel. This is a less precise method, but it works.
3. Gather Supplies: You'll need:
* New fuel filter (ensure you get the correct one for your engine!)
* Wrenches or sockets to fit the fuel line connections (often require line wrenches to avoid damaging the lines)
* Rags or absorbent material
* Container to catch spilled fuel
* Possibly a fuel line disconnect tool (depending on your fuel line type)
4. Disconnect Fuel Lines: Carefully loosen and disconnect the fuel lines from the old filter. Have your container ready to catch any spilled fuel. Note which line goes where; taking pictures is helpful.
5. Remove the Old Filter: Once the lines are disconnected, carefully remove the old fuel filter. It may be held on by clamps or a mounting bracket.
6. Install the New Filter:
* Lightly lubricate the rubber seals on the new filter with clean engine oil. This aids installation and prevents leaks.
* Carefully install the new filter, ensuring it is seated correctly.
* Re-attach the fuel lines, making sure they are securely tightened.
7. Reconnect Battery: Carefully reconnect the negative battery terminal.
8. Check for Leaks: Start the engine and check carefully for any leaks around the new filter and fuel lines. Let it run for a few minutes. If you see leaks, immediately turn off the engine and re-tighten the connections.
9. Dispose of Old Filter Properly: Do not throw the old filter in the trash. Dispose of it according to local regulations.
Important Notes:
* Fuel is highly flammable. Take extreme caution to prevent fire.
* If you are not comfortable performing this task, take your Blazer to a qualified mechanic. Improperly installing a fuel filter can lead to serious problems, including engine damage and fire.
* Your Blazer's year, engine type, and specific model may vary slightly in fuel filter location and replacement steps. Again, consult your owner's manual or a repair manual specific to your vehicle.
This is a general guide. The specific steps and tools may vary slightly depending on your vehicle's configuration. Always prioritize safety and consult your vehicle's repair manual for accurate and detailed instructions.
