Here's a general outline; however, consult a repair manual specific to your 1999 Chevy Suburban 1500 for detailed instructions and diagrams. These vary slightly depending on engine and options. A Haynes or Chilton manual is a good investment.
1. Preparation:
* Safety First: Disconnect the negative battery terminal.
* Gather Tools: You'll need jack stands, jack, socket set (various sizes), wrenches, fuel line disconnect tools, new fuel pump assembly (ensure it's the correct one for your vehicle), safety glasses, gloves, rags, and possibly a fuel pump pressure tester.
* Drain the Fuel Tank (Recommended, but not strictly necessary): This significantly reduces the risk of fuel spills. Use a siphon pump or carefully lower the fuel level by driving until almost empty.
* Locate the Fuel Pump Access Panel: This is typically located under the rear passenger seat or in the bed of the truck, depending on the model. Consult your repair manual.
2. Accessing the Fuel Pump:
* Remove the Access Panel: This usually involves removing some interior panels and possibly the rear seat.
* Disconnect Electrical Connectors: Carefully disconnect the fuel pump electrical connectors. Take photos or make notes to ensure correct reassembly.
* Disconnect Fuel Lines: Use fuel line disconnect tools to safely separate the fuel lines from the pump. Be prepared for some fuel spillage, even with a drained tank. Have rags ready.
* Remove the Fuel Pump: This often involves removing a retaining ring or bolts holding the pump assembly in place. Again, your repair manual will provide specifics. The pump is usually accessed from within the fuel tank.
3. Installing the New Fuel Pump:
* Install the New Fuel Pump: Carefully install the new fuel pump assembly, making sure the gasket is properly seated.
* Reconnect Fuel Lines: Connect the fuel lines securely, ensuring they are tightly attached and leak-free.
* Reconnect Electrical Connectors: Reconnect the electrical connectors, making sure they are properly seated.
* Reinstall Access Panel: Securely re-install the access panel and any interior panels you removed.
4. Testing and Final Steps:
* Reconnect the Battery: Carefully reconnect the negative battery terminal.
* Prime the Fuel System: Some vehicles require priming the fuel system before starting. Consult your repair manual for the proper procedure. This may involve turning the key to the "on" position several times, allowing the pump to build pressure.
* Check for Leaks: Inspect for any fuel leaks around the fuel lines and pump assembly.
* Start the Engine: Start the engine and listen for any unusual noises. Check the engine for proper operation.
* Fuel Pressure Test (Optional but Recommended): Use a fuel pressure tester to verify the fuel pump is delivering the correct pressure. Consult your repair manual for the specified pressure.
Important Considerations:
* Fuel is Flammable: Work in a well-ventilated area away from open flames or sparks.
* Fuel is Toxic: Use appropriate safety equipment, including gloves and eye protection.
* Professional Help: If you are not comfortable performing this repair yourself, take your Suburban to a qualified mechanic. Improper installation could lead to serious problems.
This is a general guide. Always refer to a repair manual specific to your 1999 Chevy Suburban 1500 for detailed, model-specific instructions. Improper installation can lead to serious problems, including fire. If you're uncertain about any step, seek professional assistance.
