Here's a general overview. Specific steps might vary slightly depending on your Suburban's trim level and engine (e.g., 5.7L vs. 7.4L). Always consult a repair manual specific to your vehicle's year, make, model, and engine for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
Before You Begin:
1. Safety First: Disconnect the negative battery terminal. Work in a well-ventilated area away from open flames. Have proper safety glasses and gloves. Consider using an explosion-proof work light.
2. Gather Tools and Materials: You'll need a socket set (metric), wrenches, screwdrivers, fuel line disconnect tools, a fuel pump pliers (or similar tool to access the retaining ring), a new fuel pump assembly (ensure it's the correct one for your vehicle), jack stands, jack, and possibly a fuel pressure gauge (to relieve pressure).
3. Drain Fuel: If possible, run the vehicle until close to empty to minimize fuel spillage.
4. Pressure Relief: Consult your repair manual for the proper method to relieve pressure in the fuel system. This may involve disconnecting the fuel pump relay or using a fuel pressure gauge to safely release pressure.
General Steps:
1. Lower the Fuel Tank: This is usually the most challenging part. You'll need to access the fuel tank straps and disconnect them. The location and method vary, but generally involves using jack stands to support the vehicle safely, then lowering the tank with either a jack or strap system. You may need to disconnect the fuel filler neck and any other related components. Again, your repair manual is crucial here.
2. Disconnect Fuel Lines and Electrical Connector: Carefully disconnect the fuel lines using the appropriate fuel line disconnect tools. Mark the lines to ensure proper reassembly. Disconnect the electrical connector to the fuel pump.
3. Remove the Fuel Pump Assembly: This usually involves removing a retaining ring (often requiring fuel pump pliers) from the top of the fuel pump assembly that sits inside the fuel tank. Once the ring is off, carefully lift out the pump assembly.
4. Installation of the New Fuel Pump: Carefully install the new fuel pump assembly, ensuring the gasket seals properly. Reinstall the retaining ring.
5. Reconnect Fuel Lines and Electrical Connector: Reconnect the fuel lines and electrical connector, making sure everything is securely attached and no leaks are present.
6. Raise the Fuel Tank: Carefully raise the fuel tank back into place and secure it with the straps.
7. Reconnect Filler Neck and other Components: Make sure to reconnect all other lines and components you disconnected earlier.
8. Reconnect the Battery: Reconnect the negative battery terminal.
9. Check for Leaks: Inspect all connections for leaks. Start the engine and check for leaks again. If you hear a loud humming sound from the fuel pump this could be an indication that the pump is functioning but may be about to go again. It may be wise to have it checked if so.
10. Prime the Fuel System: You may need to prime the fuel system (consult your repair manual) if the engine doesn't start immediately.
Important Considerations:
* Fuel Spillage: Be extremely careful to avoid spilling fuel.
* Static Electricity: Avoid sparks near fuel lines.
* Fuel Pump Seal: Make sure the new fuel pump has a good seal to prevent fuel leaks.
* Repair Manual: This is not a complete guide. A detailed repair manual is absolutely necessary.
This process is significantly more involved than what can be described in this response. If you're not comfortable with this level of automotive repair, it's strongly recommended to take your Suburban to a qualified mechanic. Attempting this repair incorrectly can be dangerous and costly.
