Here's a general outline. Specific steps and difficulties might vary slightly depending on your Tahoe's exact configuration. Consult a repair manual specific to your year and model for detailed diagrams and torque specifications. A Haynes or Chilton manual would be a great investment.
Tools You'll Need:
* Socket set (metric): Various sizes, including those for the fuel lines.
* Wrench set (metric): For various nuts and bolts.
* Fuel line disconnect tool: This prevents damage to the fuel lines. Improper disconnection can lead to leaks.
* Torque wrench: Crucial for tightening bolts to the correct specification.
* Safety glasses: Protect your eyes from fuel spray and debris.
* Gloves: Protect your hands from fuel and grime.
* Jack and jack stands: Securely lift the vehicle.
* Wheel chocks: To prevent the vehicle from rolling.
* Drain pan: To catch any spilled fuel.
* New fuel pump: Make sure you get the correct one for your vehicle.
* Fuel pump installation kit (often included with the pump): This typically includes seals and gaskets.
* Shop rags or paper towels: For cleaning.
* Pliers: Possibly needed for various tasks.
* Screwdrivers (Phillips and flathead): Might be needed for some components.
Procedure (General Steps):
1. Safety First: Disconnect the negative battery terminal. Allow several minutes for the electrical system to discharge.
2. Vehicle Preparation: Park on a level surface, engage the parking brake, and use wheel chocks. Raise the rear of the vehicle using a jack and secure it on jack stands.
3. Access the Fuel Pump: This typically involves lowering the fuel tank. This can be done in various ways depending on your Tahoe's specific model. You might need to remove the bed access panel to reach the fuel tank straps and sender unit. Consult your repair manual for the exact procedure.
4. Disconnect Fuel Lines and Electrical Connections: Use the fuel line disconnect tool to carefully disconnect the fuel lines. Be prepared for some fuel spillage; use the drain pan. Disconnect the electrical connector to the fuel pump. Note how everything is connected for reassembly.
5. Remove the Fuel Pump: Once the lines and connectors are disconnected, you'll likely need to remove the fuel pump assembly (the sending unit). This usually involves removing bolts or clamps holding the assembly in place.
6. Replace the Fuel Pump: Carefully remove the old fuel pump from the assembly. Install the new fuel pump, ensuring all seals and gaskets are properly seated.
7. Reassembly: Reinstall the fuel pump assembly, reconnect the fuel lines and electrical connector. Double-check all connections to prevent leaks. Lower the fuel tank.
8. Reconnect Battery: Reconnect the negative battery terminal.
9. Prime the Fuel System: You might need to prime the fuel system (check your repair manual for your specific procedure), often by turning the ignition key to the "on" position several times, but not starting the engine. This helps to fill the lines and get the pump working.
10. Check for Leaks: Carefully inspect all fuel lines and connections for leaks.
11. Start the Engine: Start the engine and let it run for a few minutes, checking for any unusual sounds or smells.
Important Notes:
* Fuel Pressure: Some fuel systems have significant pressure. Release the pressure before disconnecting the fuel lines if your repair manual indicates it's necessary.
* Repair Manual: This is highly recommended. Pictures and detailed instructions are crucial for this job.
* Professional Help: If you are uncomfortable performing this repair yourself, take your Tahoe to a qualified mechanic. A mistake can lead to fire or other serious problems.
This is a simplified overview. Consult a repair manual specific to your 1997 Chevy Tahoe 5.7L for precise instructions and safety precautions. Remember, safety should always be your top priority when working with fuel.
