Here's a general outline. This is NOT a complete, step-by-step guide, and specific steps may vary depending on your truck's engine and body style (short bed, long bed, etc.). Always consult a repair manual specific to your 1987 Chevy truck model for detailed instructions and diagrams.
1. Preparation:
* Gather Tools: You'll need jack stands, a jack, wrenches (various sizes), sockets, a fuel line disconnect tool, a fuel pump removal tool (often a specialized tool, but sometimes can be improvised), safety glasses, gloves, rags, and possibly a new fuel filter. A torque wrench is highly recommended.
* Safety Precautions: Disconnect the negative battery cable. Allow the fuel system to depressurize (let the engine run until it stalls, or use a fuel pressure gauge). This is crucial to prevent a fire.
* Locate the Fuel Pump: It's usually located inside the fuel tank, which is often under the truck bed.
2. Accessing the Fuel Pump:
* Drop the Fuel Tank: This usually involves removing the straps holding the tank in place. You'll likely need to disconnect fuel lines, the fuel sender unit (if it's integrated), and possibly the fuel tank skid plate. Be prepared for fuel spillage; have absorbent material ready.
3. Removing the Fuel Pump:
* Disconnect Fuel Lines: Carefully disconnect the fuel supply and return lines. Use the fuel line disconnect tool to avoid damaging the lines.
* Disconnect Electrical Connections: Disconnect the fuel pump electrical connector.
* Remove the Fuel Pump Assembly: This is where the specialized removal tool often comes in handy. The pump assembly may be held in place by a retaining ring or other fasteners.
4. Installing the New Fuel Pump:
* Install the New Fuel Pump Assembly: Carefully install the new fuel pump assembly, making sure it's seated correctly.
* Reconnect Electrical Connections: Reconnect the fuel pump electrical connector.
* Reconnect Fuel Lines: Reconnect the fuel supply and return lines securely. Make sure the connections are tight and leak-free.
5. Reassembly:
* Raise and Secure the Fuel Tank: Carefully raise the fuel tank and secure it back into its original position.
* Reconnect All Components: Reconnect any components you disconnected during the process.
* Check for Leaks: Carefully check all fuel line connections for leaks.
* Reconnect Battery Cable: Reconnect the negative battery cable.
* Prime the Fuel System (If necessary): Some vehicles require priming the fuel pump after installation. Your repair manual will tell you how.
* Start the Engine: Start the engine and check for any issues or leaks.
Important Considerations:
* Fuel Pressure: After installation, you should verify fuel pressure with a gauge to ensure the pump is working correctly.
* Repair Manual: A repair manual specific to your year, make, and model of Chevy truck is crucial. It will provide precise instructions, torque specifications, and diagrams that are essential for a successful repair.
* Professional Help: If you're not comfortable working on your fuel system, it's always best to seek professional help from a qualified mechanic. Working with gasoline is dangerous, and improper repairs can lead to serious problems.
This is a simplified overview. Always consult a repair manual for your specific vehicle before attempting this repair. Remember to prioritize safety throughout the entire process.
