Here's a general outline. This is not a substitute for a detailed repair manual specific to your 2000 Jimmy. Consult a repair manual (like a Haynes or Chilton manual) for precise instructions, torque specifications, and diagrams specific to your vehicle's year, engine, and trim level. Improper procedures can result in serious injury or damage to your vehicle.
Steps (General):
1. Safety First: Disconnect the negative battery terminal. Allow the fuel system to depressurize. This might involve running the engine until it stalls after a few attempts to start, ensuring the fuel pump is not pressurizing. Some vehicles have specific pressure release valves. Check your repair manual.
2. Access the Fuel Pump: This usually involves dropping the fuel tank. The process varies depending on whether your Jimmy has a rear-mounted or in-tank fuel pump. This often requires:
* Lowering the fuel tank: This involves disconnecting the fuel lines, electrical connectors, and the tank's support straps. You'll likely need jack stands and safety precautions to work safely underneath the vehicle. Fuel is flammable and dangerous! Work in a well-ventilated area and take all necessary precautions.
* Removing the fuel pump access panel (if applicable): Some models have an access panel in the bed of the truck or under the rear seat to access the pump without dropping the tank. Check your repair manual to determine if this is an option on your specific Jimmy.
3. Disconnect the Fuel Lines and Electrical Connectors: Carefully disconnect the fuel lines and electrical connectors to the fuel pump. Have rags or containers ready to catch any spilled fuel.
4. Remove the Fuel Pump: The fuel pump is usually held in place by a retaining ring or clamp. This will need to be carefully removed to access the pump assembly. The fuel pump assembly may also contain the fuel level sending unit and other components that need to be removed along with it.
5. Install the New Fuel Pump: Carefully install the new fuel pump assembly, ensuring all components are properly seated and tightened to specifications.
6. Reconnect Everything: Reconnect the electrical connectors and fuel lines, ensuring there are no leaks. Double-check all connections.
7. Raise the Fuel Tank (if applicable): Carefully raise the fuel tank back into its position and secure it with the support straps.
8. Reconnect the Battery Terminal: Reconnect the negative battery terminal.
9. Prime the Fuel System (if necessary): Your repair manual might specify a priming procedure after replacing the fuel pump. This may involve turning the ignition key on and off multiple times to build pressure in the fuel system before attempting to start the engine.
10. Check for Leaks: After starting the engine, carefully check for any fuel leaks around the fuel pump and fuel lines.
Important Considerations:
* Fuel Pressure: You may need a fuel pressure gauge to test the fuel system before and after the replacement.
* Fuel Pump Assembly: You'll likely be replacing the entire fuel pump assembly, not just the pump itself. This assembly often includes the fuel level sending unit and other components.
* Professional Help: If you are not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. This is a complex job with potential safety hazards.
Always consult your vehicle's repair manual for specific instructions and safety precautions. This information is for guidance only and does not substitute professional advice. Working with fuel is dangerous; proceed with caution and prioritize safety.
