Here's a general outline. Specific steps might vary slightly depending on your Tahoe's configuration. Always consult a repair manual specific to your year and model for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
Tools You'll Likely Need:
* Socket set and wrenches: Various sizes, including metric and standard.
* Torque wrench: To tighten bolts to the correct specifications.
* Fuel pump pliers or a fuel line disconnect tool: To safely disconnect fuel lines.
* Screwdrivers: Phillips and flathead.
* Jack and jack stands: To safely lift the vehicle.
* Wrench for fuel tank straps: Often a ratchet with long extensions is needed.
* Safety glasses and gloves: Protect yourself from fuel and sharp edges.
* New fuel pump: Ensure it's the correct one for your vehicle.
* New fuel filter (recommended): Replace it while you're at it.
* Shop rags or paper towels: To clean up spills.
* Fuel pressure gauge (optional but recommended): To check fuel pressure before and after the replacement.
Procedure (General Steps):
1. Safety First: Disconnect the negative battery terminal.
2. Lower the Fuel Tank: This is the most challenging part. You'll likely need to:
* Access the fuel tank straps. These are typically located under the vehicle.
* Carefully loosen the straps (often requires long extensions on your ratchet).
* Lower the tank slightly; it might be necessary to use a jack or support straps to safely lower and support the tank while working. Support the tank adequately to prevent it from dropping unexpectedly.
3. Disconnect Fuel Lines:
* Caution: Fuel will likely remain in the lines. Use shop rags to absorb any spills.
* Use fuel line disconnect tools or fuel pump pliers to carefully disconnect the fuel lines from the pump. Mark the lines clearly to ensure correct reassembly.
* Some vehicles have quick-disconnect fittings, while others require a careful twisting motion.
4. Disconnect Electrical Connector: Disconnect the electrical connector from the fuel pump.
5. Remove the Fuel Pump Access Panel: The access panel is usually located on top of the fuel tank. Remove it to access the fuel pump. This often involves removing a retaining ring or bolts.
6. Remove the Old Fuel Pump: This often involves removing a retaining ring or bolts securing the pump assembly to the tank.
7. Install the New Fuel Pump: Carefully install the new fuel pump, making sure the O-ring or gasket seals properly.
8. Reconnect Everything: Reverse the steps above, carefully reconnecting the fuel lines, electrical connector, and access panel. Double-check that all connections are secure.
9. Raise the Fuel Tank: Carefully raise the fuel tank back into its position. Securely tighten the tank straps.
10. Reconnect the Battery: Reconnect the negative battery terminal.
11. Check for Leaks: Inspect all connections for leaks.
12. Prime the Fuel System: Some vehicles require priming the fuel system; your repair manual will advise how. This could involve turning the key to the "on" position several times (don't crank the engine) to pressurize the system.
13. Start the Engine: Start the engine and check for leaks, proper operation, and for any diagnostic trouble codes (check engine light).
Important Considerations:
* Fuel Vapor: Work in a well-ventilated area and avoid sparks.
* Safety: Use jack stands to support the vehicle securely.
* Manual: Refer to a repair manual specific to your vehicle for detailed instructions and diagrams. This is crucial for success.
* Professional Help: If you're not comfortable with this repair, take your Tahoe to a qualified mechanic. Incorrect installation can lead to serious safety issues.
This is a general guide. Improper installation can lead to serious problems. Again, consulting a repair manual for your specific vehicle is absolutely essential. If you're unsure about any step, seek professional help.
