Here's a general outline of the process. Specific details may vary depending on the exact configuration of your van. Always consult your vehicle's repair manual for the most accurate and detailed instructions.
Safety First:
* Disconnect the negative battery cable before you begin any work. This prevents accidental sparks.
* Work in a well-ventilated area. Gasoline fumes are flammable and dangerous.
* Wear safety glasses and gloves.
* Have a fire extinguisher readily available.
Procedure:
1. Relieve Fuel System Pressure:
* Start the engine and let it run until it stalls. This uses up the fuel pressure in the line.
* Alternatively (and recommended), use a fuel pressure gauge to measure and safely relieve the pressure according to the gauge's instructions.
2. Locate the Fuel Pump:
* The fuel pump on a 1998 GMC Safari is usually located inside the fuel tank. Access is typically gained from underneath the vehicle. You'll need to consult your repair manual for the exact location and access method (often involves dropping the fuel tank).
3. Prepare for Fuel Tank Removal/Access:
* Disconnect the fuel lines: This requires careful work. Use appropriately sized wrenches or fuel line disconnect tools. Have rags ready to absorb any spilled fuel. Mark the lines to ensure proper reassembly.
* Disconnect the electrical connector: This usually involves unplugging a single connector from the fuel pump.
* Disconnect the fuel tank straps/sending unit: This may involve removing bolts or clips holding the tank in place. You might need a helper to support the tank as it’s lowered.
* Lower the fuel tank: Support the tank carefully as you lower it. You might need jack stands or a suitable support system to prevent it from dropping suddenly.
4. Access and Remove the Fuel Pump:
* Once the fuel tank is accessible, you’ll usually find the fuel pump assembly inside the tank. This often involves removing a retaining ring or cover.
* Remove the old fuel pump: Pay close attention to how the old pump is installed, taking pictures if necessary, to ensure you install the new one correctly.
5. Install the New Fuel Pump:
* Carefully install the new fuel pump, making sure it seats correctly and all the seals are in place.
* Reinstall the retaining ring or cover.
6. Reassembly:
* Carefully raise the fuel tank back into place.
* Reconnect the fuel lines, electrical connector, and tank straps. Double-check that all connections are secure.
* Tighten all bolts and straps to the manufacturer’s specifications.
7. Reconnect the Battery:
* Reconnect the negative battery cable.
8. Test and Inspect:
* Start the engine and check for leaks around the fuel lines and connections. Listen for any unusual noises from the fuel pump.
* Check the fuel pressure (if you have a gauge) to ensure the new pump is functioning correctly. Consult your repair manual for correct pressure specifications.
Important Notes:
* This is a general guide. Refer to your vehicle's repair manual for precise instructions and torque specifications.
* Consider using new fuel line clamps and seals to prevent leaks.
* If you are unsure about any step, consult a professional mechanic. Working with fuel systems can be dangerous if not done correctly.
This is a significant undertaking. If you lack experience with automotive repair, seeking professional assistance is strongly recommended to prevent damage to your vehicle and potential injury. Remember safety is paramount.
