Here's a general outline. This is not a substitute for a proper repair manual specific to your vehicle year and engine. Always consult a repair manual for detailed instructions and torque specifications.
1. Preparation:
* Safety First: Disconnect the negative battery cable. Allow several minutes for the system to discharge before proceeding. Work in a well-ventilated area.
* Gather Tools: You'll need various tools, including sockets (various sizes), wrenches, screwdrivers (Phillips and flathead), a fuel pump removal tool (often a specialized socket), jack stands, safety glasses, gloves, and possibly a fuel pressure gauge.
* Drain the Fuel Tank (Optional but Recommended): Siphoning out as much fuel as possible makes the job significantly easier and reduces the risk of spills.
* Locate the Fuel Pump: It's usually located under the rear seat or in the bed of the truck (depending on the model, consult your manual).
2. Accessing the Fuel Pump:
* Drop the Fuel Tank (Most Common Method): This typically involves lowering the fuel tank. You'll need to disconnect fuel lines, the electrical connector, and possibly a vent line. Support the tank with jack stands to prevent it from falling.
* Access Panel (Less Common): Some Tahoes may have an access panel under the rear seat, allowing direct access to the fuel pump without dropping the tank.
3. Fuel Pump Removal:
* Disconnect Electrical Connector: Carefully disconnect the electrical connector from the fuel pump.
* Disconnect Fuel Lines: Carefully disconnect the fuel lines. Have rags ready to absorb any spilled fuel. You might need fuel line disconnect tools.
* Remove the Fuel Pump Assembly: This usually involves unscrewing a retaining ring or using a fuel pump removal tool to lift the assembly out of the tank.
4. Installing the New Fuel Pump:
* Install the New Fuel Pump Assembly: Carefully install the new fuel pump assembly into the tank, ensuring it's seated correctly.
* Reconnect Fuel Lines: Carefully reconnect the fuel lines, ensuring they are secure and leak-free.
* Reconnect Electrical Connector: Securely connect the electrical connector to the fuel pump.
* Reinstall the Fuel Pump Access Panel or Fuel Tank: Reinstall the access panel or raise the fuel tank back into position. Secure all fasteners.
5. Post-Installation:
* Reconnect the Battery: Reconnect the negative battery cable.
* Check for Leaks: Carefully inspect all fuel lines and connections for leaks.
* Prime the Fuel System (If Needed): Some vehicles may require you to prime the fuel system before attempting to start the engine. Consult your repair manual.
* Start the Engine: Start the engine and listen for any unusual noises. Check for leaks again.
Important Considerations:
* Fuel Pressure: A fuel pressure gauge can be used to verify correct fuel pressure after installation.
* Fuel Filter: Consider replacing the fuel filter at the same time for best results.
* Safety: Always work in a well-ventilated area away from ignition sources. Fuel is extremely flammable.
Disclaimer: This is a general guide only. Improper installation can lead to serious damage to your vehicle or personal injury. Always consult a repair manual specific to your 1999 Chevy Tahoe and consider seeking professional assistance if you're not comfortable performing this repair yourself.
