Here's a general outline. Specific steps and tools might vary slightly depending on your exact Caprice model (e.g., Classic, Brougham). Consult a repair manual specific to your vehicle's year and model for detailed instructions and diagrams. This is crucial for accuracy and safety.
1. Preparation:
* Safety First: Disconnect the negative battery terminal. Allow the fuel pressure to release. This usually involves running the engine until it stalls (after a few attempts to start), or using a fuel pressure release tool. Never work near an open flame or sparks.
* Gather Tools: You'll need jack stands, wrenches (various sizes), sockets, a fuel line disconnect tool, a fuel pump removal tool (often a specialized tool, but sometimes a large pry bar can work if careful), safety glasses, gloves, rags, and a new fuel pump.
* Lower the Fuel Tank (Most Common Method): This usually requires dropping the fuel tank to access the pump. This is the most challenging part of the job. You'll need to:
* Support the vehicle securely on jack stands.
* Locate the fuel tank straps and carefully loosen and remove them.
* Disconnect the fuel lines (use the disconnect tool to avoid damage).
* Disconnect the fuel tank sending unit (fuel gauge) connector.
* Carefully lower the fuel tank. You may need to use straps or a fuel tank support to prevent dropping it fully to the ground.
* CAUTION: Fuel may still remain in the tank, so be very careful to avoid spills.
2. Fuel Pump Replacement:
* Access the Fuel Pump: The fuel pump is usually located inside the fuel tank.
* Remove the Fuel Pump Assembly: Use the fuel pump removal tool to carefully remove the assembly. This usually involves unbolting the retaining ring or using a specialized tool to pull the pump assembly out. Again, consult your repair manual for precise instructions.
* Replace the Fuel Pump: Install the new fuel pump assembly, ensuring it's correctly seated and secured.
* Reconnect Everything: Carefully reattach the fuel lines, the fuel sending unit connector, and the fuel tank straps. Make sure all connections are tight and secure.
3. Reassembly:
* Raise the Fuel Tank: Carefully raise the fuel tank back into its position.
* Reconnect Battery: Reconnect the negative battery terminal.
* Check for Leaks: Before starting the car, visually inspect all fuel lines and connections for leaks.
* Start the Engine: Start the engine and listen for unusual noises and check for leaks. Let the engine run for a few minutes to allow the fuel system to prime.
Important Considerations:
* Fuel Pressure Regulator: While not directly related to the pump, the fuel pressure regulator should be checked at the same time. A failing regulator can contribute to fuel pump failure.
* Fuel Filter: Consider replacing the fuel filter while you have the fuel tank down. It's a relatively cheap and easy preventative measure.
* Professional Assistance: If you're not comfortable performing this repair yourself, consider taking your Caprice to a qualified mechanic. Incorrectly installing a fuel pump can lead to significant safety hazards and damage.
This is a simplified overview. Always refer to a repair manual specific to your 1989 Chevy Caprice for precise instructions, diagrams, torque specifications, and safety precautions. Failing to do so could result in injury or damage to your vehicle.
