Tools you'll need:
* Wrench(es): The size will depend on your Blazer's fuel filter; you'll likely need a wrench for the fuel line connections (usually 5/16" or 3/8" line wrench).
* Socket and ratchet (optional): Might be easier than a wrench for some fuel line fittings.
* Fuel line disconnect tool (recommended): These tools help prevent damaging the fuel lines. If you don't have one, be extremely careful.
* Jack and jack stands (highly recommended): For easier access to the fuel filter. Safety first!
* Rags or shop towels: To clean up any spilled fuel.
* New fuel filter: Make sure you get the correct one for your engine size and model year.
* Container: To catch the spilled fuel.
* Gloves: To protect your hands from fuel.
* Safety Glasses: To protect your eyes from fuel spray.
Procedure:
1. Safety First: Disconnect the negative battery cable.
2. Locate the Fuel Filter: The fuel filter's location varies slightly depending on the engine and trim level, but it's generally located near the fuel tank, often under the vehicle. Consult your owner's manual or a repair manual for the exact location.
3. Prepare for Fuel Release: Place your container under the fuel filter to catch any spilled fuel. Loosen the fuel line connections *slightly* to relieve pressure before completely disconnecting them. Fuel will likely spill out, so be prepared.
4. Disconnect Fuel Lines: Carefully disconnect the fuel lines from the filter using your wrench or socket/ratchet and the fuel line disconnect tool (if you have one). Be aware that fuel will leak out.
5. Remove the Fuel Filter: Once the fuel lines are disconnected, carefully remove the fuel filter from its mounting bracket.
6. Install New Filter: Carefully install the new fuel filter, ensuring it's oriented correctly (usually there's an arrow indicating fuel flow direction).
7. Reconnect Fuel Lines: Carefully reconnect the fuel lines to the new filter. Make sure the connections are tight and secure.
8. Reconnect Battery Cable: Reconnect the negative battery cable.
9. Prime the Fuel System (Important): This is crucial to avoid engine stalling. You might need to crank the engine for a few seconds (without actually starting it) to allow the fuel pump to prime the system. Repeat this if needed.
10. Start the Engine: Start the engine and check for leaks around the fuel filter and connections. Let the engine run for a few minutes to ensure everything is working properly.
11. Check for Leaks: After running the engine, carefully inspect all connections for leaks.
Important Considerations:
* Fuel is Flammable: Work in a well-ventilated area, away from any open flames or sparks.
* Fuel is Toxic: Avoid skin contact and inhalation.
* Pressure: The fuel system is under pressure; relieve it before disconnecting lines.
* Repair Manual: A repair manual specific to your 1999 Chevy Blazer is highly recommended. It will provide detailed diagrams and instructions.
If you're not comfortable performing this task yourself, it's always best to take your Blazer to a qualified mechanic. This is not a simple task, and improper execution can lead to damage to your vehicle or injury to yourself.
