Here's a general outline of the process. Specifics might vary slightly depending on the engine and trim level. Always consult a repair manual specific to your 1999 Chevrolet Suburban for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
1. Safety First:
* Disconnect the negative battery terminal. This prevents accidental sparks.
* Ventilate the area. Work in a well-ventilated space away from open flames or sparks. Fuel fumes are highly flammable.
* Wear safety glasses and gloves.
* Have a fire extinguisher readily available.
2. Preparation:
* Gather your tools. You'll need a variety of tools, including sockets, wrenches, screwdrivers (possibly Torx), a fuel pump removal tool (often a special socket or strap wrench), pliers, and possibly a fuel line disconnect tool.
* Drain the fuel tank. This significantly reduces the amount of fuel you'll be dealing with and makes the job safer. You can siphon the fuel carefully into an approved container, or use a fuel pump to drain the tank. Never attempt to drain the tank near an open flame.
* Locate the fuel pump access panel. This is usually under the rear passenger seat or in the bed of the truck. You'll need to remove the seat or access panels to reach the fuel pump.
3. Accessing the Fuel Pump:
* Disconnect the electrical connector. This will be connected to the fuel pump module.
* Disconnect the fuel lines. This is where a fuel line disconnect tool can be invaluable. You'll likely need to relieve pressure from the fuel lines before disconnecting; consult your repair manual for the proper procedure. Have rags ready to absorb any spilled fuel.
* Remove the fuel pump access panel. The design varies by model, but it often involves removing bolts or clips.
* Remove the retaining ring or bolts holding the fuel pump assembly in place.
* Carefully remove the fuel pump assembly. It might be helpful to use a fuel pump removal tool to help lift the pump out.
4. Replacing the Fuel Pump:
* Inspect the old fuel pump and gasket(s). Note any damage or wear.
* Install the new fuel pump assembly. Ensure the gasket is properly seated.
* Carefully reinstall the retaining ring or bolts.
* Reconnect the fuel lines. Make sure they're securely attached and don't leak.
* Reconnect the electrical connector.
5. Reassembly:
* Reinstall the fuel pump access panel.
* Reconnect the negative battery terminal.
* Check for leaks.
* Start the engine and check for proper fuel pressure. You might need a fuel pressure gauge to do this. (Refer to your repair manual for fuel pressure specifications.)
Important Considerations:
* Fuel pump replacement kits often include new gaskets, seals, and other components. Use these to ensure a proper seal.
* The fuel pump module might be a single unit or may contain the pump and other components. If replacing the module, ensure you're replacing the correct part for your vehicle.
* Prime the fuel system after installing the new pump; again, consult your repair manual for the correct procedure.
This is a general overview; refer to a repair manual specific to your 1999 Chevrolet Suburban for detailed, step-by-step instructions, diagrams, torque specifications, and safety precautions. Improperly completing this repair could lead to serious injury or damage to your vehicle. If you're uncertain about any step, seek professional help.
