Disclaimer: This guide is provided for informational purposes only and does not guarantee the accuracy or completeness of the information. It is recommended to refer to a professional mechanic or the vehicle's workshop manual for detailed and accurate instructions.
1. Safety Precautions:
- Disconnect the negative battery terminal to prevent electrical shock and accidental ignition.
- Ensure you are working in a well-ventilated area to avoid fuel vapors.
- Have a fire extinguisher nearby as a safety measure.
2. Locate the Fuel Pump Access:
- The fuel pump on the 1991 Chevy Blazer is located inside the fuel tank.
- You will need to access it by removing the fuel tank skid plate and lowering the tank.
3. Lower the Fuel Tank:
- Safely support the rear of the vehicle with jack stands.
- Locate and remove the bolts or screws holding the fuel tank skid plate in place.
- Disconnect any fuel lines or electrical connectors attached to the top of the fuel tank.
- Lower the fuel tank carefully by using a floor jack or a block of wood and a pry bar.
4. Disconnect Fuel Lines:
- Disconnect the fuel inlet and outlet lines from the fuel pump assembly.
- Place a container underneath to catch any spilled fuel.
5. Remove Fuel Pump Assembly:
- Remove the fuel pump assembly's retaining ring or lock ring using a suitable tool or wrench.
- Carefully lift and remove the fuel pump assembly from the fuel tank.
6. Replace Fuel Pump:
- Inspect the old fuel pump for any signs of damage or failure.
- Transfer the fuel pump hanger bracket (if applicable) to the new fuel pump assembly.
- Install the new fuel pump into the tank, aligning it correctly with the retaining ring or lock ring.
7. Reinstall Fuel Tank and Components:
- Reinstall the fuel tank by carefully raising it into position and securing it with the bolts or screws previously removed.
- Reconnect any fuel lines or electrical connectors.
8. Test the Fuel Pump:
- Turn on the ignition without starting the engine to allow the fuel pump to prime the system.
- Listen for any unusual noises or leaks from the fuel pump area.
9. Reconnect the Battery:
- Reconnect the negative battery terminal.
10. Start the Engine and Test:
- Start the engine and let it run for a few minutes to ensure proper fuel flow and functionality.
11. Check for Leaks:
- Visually inspect the fuel pump area for any leaks.
12. Clean Up and Reassemble:
- Reinstall any removed components, such as the fuel tank skid plate.
- Clean up any spilled fuel and ensure all tools are removed.
Remember, working with fuel systems can be dangerous, and if you are not comfortable with the process, it's best to seek professional help from a qualified mechanic or refer to the vehicle's specific workshop manual for detailed instructions and safety precautions.
