Note: Safety precautions are essential when working with fuel systems. Ensure the vehicle is in a well-ventilated area away from ignition sources. Read and follow any warnings or instructions provided in the vehicle's service manual.
Tools and Materials Needed:
- Replacement fuel pump (specific to your GMC Safari model)
- Fuel line disconnect tool
- Screwdriver
- Pliers
- Socket wrench set
- Jack and jack stands
- Fuel-safe container for draining fuel
- Safety glasses
- Gloves
Procedure:
1. Prepare the Vehicle: Park the vehicle on a level surface, apply the parking brake, and turn off the engine. Allow the engine and exhaust system to cool down completely.
2. Locate the Fuel Pump: The fuel pump is typically located inside the fuel tank. Consult your vehicle's service manual for the exact location.
3. Relieve Fuel System Pressure: Before disconnecting any fuel lines, it's essential to relieve the fuel system pressure. Refer to your vehicle's service manual for instructions specific to your model.
4. Disconnect the Battery: As a safety precaution, disconnect the vehicle's battery. This will prevent accidental electrical sparks that could ignite fuel vapors.
5. Raise the Vehicle: Use a jack and jack stands to raise the rear of the vehicle, providing easy access to the fuel tank. Ensure the vehicle is securely supported before proceeding.
6. Locate the Fuel Tank: Access the fuel tank by removing the rear cargo cover, carpet, or access panel (if applicable). The fuel tank is typically located in the rear of the vehicle.
7. Disconnect Fuel Lines: Locate the fuel lines connected to the fuel pump. Use the fuel line disconnect tool or pliers to carefully disconnect the fuel lines. Expect some fuel to spill, so have a fuel-safe container ready to catch the fuel.
8. Remove Fuel Pump Access Cover: Depending on your vehicle's design, there might be an access cover on the fuel tank that needs to be removed to reach the fuel pump. Consult the service manual for your model.
9. Remove the Fuel Pump: Once the access cover is removed, you should be able to see the fuel pump. Disconnect any electrical connectors and remove the mounting bolts to take out the fuel pump assembly.
10. Transfer Fuel Level Sending Unit: The fuel level sending unit may be attached to the old fuel pump. Carefully remove it and transfer it to the new fuel pump assembly, if required.
11. Install the New Fuel Pump: Place the new fuel pump into the tank and make sure that the alignment is correct. Tighten the mounting bolts to secure the new fuel pump.
12. Reconnect Fuel Lines: Reconnect the fuel lines to the new fuel pump, ensuring a tight and secure connection.
13. Lower the Vehicle: Carefully lower the vehicle using the jack and jack stands. Remove the safety stands and make sure the vehicle is safely on the ground.
14. Reconnect the Battery: Reconnect the vehicle's battery.
15. Test the Fuel Pump: Turn on the ignition (without starting the engine) to allow the fuel pump to pressurize the fuel system. Listen for the pump to run for a few seconds and then turn off. This confirms that the fuel pump is operational.
16. Start the Engine: Start the engine and let it run for a few minutes. Check for any leaks around the fuel lines or from the new fuel pump.
Remember, the exact steps and parts involved may vary based on the specific model and year of your GMC Safari. Always follow the instructions provided in your vehicle's service manual. If you're not confident in performing this task or encounter any difficulties, it's best to consult a professional mechanic.
