Here's a general outline; specifics might vary slightly depending on your Blazer's engine and trim level. Always consult your vehicle's repair manual for the most accurate and detailed instructions.
Before you begin:
* Safety First: Disconnect the negative battery terminal. This prevents accidental sparks.
* Gather Tools: You'll need a socket set (metric), wrenches, screwdrivers (Phillips and flathead), fuel line disconnect tools, safety glasses, gloves, jack stands, jack, and possibly a fuel pump removal tool.
* Obtain Parts: Get a new fuel pump, fuel filter (it's a good idea to replace this while you're at it), and any gaskets or o-rings you might need. Ensure the new pump matches your Blazer's specifications.
* Ventilation: Work in a well-ventilated area. Gasoline fumes are dangerous.
* Pressure Relief: You may need to relieve fuel pressure in the system. Consult your repair manual for the proper procedure. This usually involves disconnecting the fuel pump relay and cranking the engine briefly to deplete pressure.
Steps:
1. Lower the Fuel Tank: This is usually the most challenging part. You'll likely need to:
* Access the fuel tank straps. These are typically located under the vehicle.
* Carefully lower the tank using a jack and jack stands, supporting the tank's weight at all times. Avoid damaging the fuel lines and electrical connections.
* Be prepared for some fuel spillage – use absorbent material to catch any drips.
2. Disconnect Fuel Lines and Electrical Connector: Use the appropriate tools to disconnect the fuel lines from the pump. Mark the lines if you have to disconnect multiple ones to remember where they go. Disconnect the electrical connector.
3. Remove the Fuel Pump Access Cover: Many Blazers have an access cover on the top of the fuel tank. This needs to be removed to access the fuel pump.
4. Remove the Fuel Pump: This might involve removing a retaining ring or using a specialized fuel pump removal tool. The pump assembly is typically held in place by a retaining ring or a locking mechanism.
5. Install the New Fuel Pump: Carefully install the new fuel pump, ensuring the gasket(s) are properly seated. Make sure the pump is correctly oriented according to the instructions.
6. Reassemble Everything: Reconnect the fuel lines, electrical connector, and the access cover. Carefully raise the fuel tank back into place, ensuring all connections are secure.
7. Reconnect the Battery: Attach the negative battery terminal.
8. Check for Leaks: Inspect the fuel lines and connections for any leaks.
9. Start the Vehicle: Start the vehicle and check for any issues, such as running problems or fuel leaks. Let the engine run for a few minutes to check the fuel pressure.
Important Considerations:
* Fuel System Pressure: As mentioned, relieving the fuel system pressure is crucial.
* Fuel Tank Weight: A full fuel tank is significantly heavier and harder to handle. Consider draining the tank partially before starting the repair.
* Repair Manual: Refer to a reliable repair manual for your specific 1995 Chevy Blazer model. Diagrams and detailed instructions are essential.
This is a simplified overview. Again, consulting a repair manual is strongly recommended. If you're unsure about any step, seek professional assistance. Working with fuel systems requires caution and expertise.
