Here's a general guide. Specific steps and locations may vary slightly depending on your exact model and engine. Always consult a repair manual specific to your vehicle year, make, and model for precise instructions and diagrams. A Haynes or Chilton manual is a good investment.
Tools You'll Likely Need:
* Socket set and wrenches: Various sizes, including metric and possibly SAE.
* Screwdrivers: Phillips and flathead.
* Fuel pump pliers: These are specifically designed to disconnect fuel lines. Improper tools can damage the lines.
* Wrench for fuel line disconnect: May be a special tool depending on your fuel line type.
* Torque wrench: To tighten bolts to the manufacturer's specifications.
* Jack and jack stands: Essential for safety.
* Wheel chocks: To secure the vehicle.
* Safety glasses and gloves: Protect yourself.
* New fuel pump and filter (if applicable): Ensure you get the correct part for your vehicle.
* Fuel line disconnect tool: To safely disconnect the fuel lines without damaging them.
* Shop rags or absorbent material: To clean up any spilled fuel.
* Container for old fuel: To collect any fuel that drains from the lines.
General Steps (Consult your repair manual for precise details):
1. Safety First: Disconnect the negative battery terminal. Let the vehicle sit for a few minutes to allow pressure to dissipate from the fuel system.
2. Access the Fuel Pump: This usually involves lowering the fuel tank. This is the most labor-intensive part of the job. You may need to:
* Remove the rear seat (if applicable).
* Remove access panels in the bed or under the vehicle.
* Remove the fuel tank straps.
* Carefully lower the fuel tank using a jack and jack stands (or a fuel tank lowering strap if available). Support the tank adequately to avoid damage.
3. Disconnect Fuel Lines and Electrical Connectors:
* Carefully disconnect the fuel supply and return lines using fuel line pliers or the appropriate disconnect tool. Have rags ready to soak up any spilled fuel.
* Disconnect the electrical connectors to the fuel pump.
4. Remove the Fuel Pump Assembly: This usually involves removing a retaining ring or bolts holding the pump assembly to the tank.
5. Install New Fuel Pump: Carefully install the new fuel pump and filter (if replacing), ensuring it's correctly seated.
6. Reassembly: Carefully reverse the removal steps. Reconnect the fuel lines and electrical connectors securely.
7. Raise the Fuel Tank: Carefully raise the fuel tank back into its position.
8. Reconnect the Battery: Connect the negative battery terminal.
9. Prime the Fuel System: You may need to crank the engine for a few seconds (without starting) to prime the fuel pump before attempting to start the engine.
Important Considerations:
* Fuel Pressure: Fuel systems operate under pressure. Release this pressure before disconnecting fuel lines.
* Fuel Spillage: Be prepared for fuel spillage. Keep rags handy and work in a well-ventilated area.
* Tank Removal: Lowering the fuel tank can be challenging. A helper is often recommended.
* Correct Part: Ensure you purchase the correct fuel pump and filter for your specific Blazer.
Disclaimer: This is a general guide. Incorrectly performing this repair can lead to injury or damage to your vehicle. Consult a repair manual and if you're not comfortable with the task, seek professional assistance from a qualified mechanic. This information should not be considered a substitute for professional advice.
