Safety First:
* Disconnect the negative battery terminal before starting any work on the fuel system.
* Gasoline is highly flammable. Work in a well-ventilated area, away from open flames or sparks.
* Use safety glasses to protect your eyes.
* Use jack stands if you're working under the truck. Never rely solely on a jack.
Tools You'll Need:
* Jack and jack stands (if you need to get under the truck)
* Socket wrench set (various sizes, including metric and standard)
* Wrenches (various sizes)
* Screwdrivers (Phillips and flathead)
* Fuel pump pliers or special fuel line disconnect tool
* New fuel pump (ensure you get the correct one for your vehicle)
* Fuel filter (it's a good idea to replace this while you're at it)
* Shop rags or towels
* Safety glasses
* Gloves
* Container for fuel (to catch any remaining fuel in the lines)
Procedure:
1. Locate the fuel pump. On most 1988 Chevy C10s with a 350, the fuel pump is located inside the fuel tank. You'll need to access it from underneath the vehicle.
2. Lower the fuel tank: This is usually the most challenging part. You'll likely need to:
* Disconnect the fuel lines (carefully, using fuel line pliers or a special tool to avoid spills). Have your container ready to catch any remaining fuel.
* Disconnect the fuel tank sending unit electrical connector.
* Disconnect the fuel tank straps holding the tank in place. These are often bolts.
* Carefully lower the tank. This may require using jack stands or a helper. Support the tank adequately to avoid damage.
3. Access the fuel pump: Once the tank is lowered sufficiently, you'll see the fuel pump assembly. The exact method of removal varies depending on the tank design, but generally involves removing retaining straps or a cover plate.
4. Remove the old fuel pump: This will typically involve disconnecting the electrical connector, then removing the pump assembly from the tank. Again, consult your repair manual for the correct procedure. This might involve removing retaining rings or clips.
5. Install the new fuel pump: Carefully install the new fuel pump, ensuring it's properly seated and all seals are in place.
6. Reassemble everything: Reverse the steps you took to remove the fuel pump and tank. Make sure all connections are secure. Pay close attention to the fuel lines and their proper routing. Reconnect the electrical connectors and fuel lines securely.
7. Raise the fuel tank: Carefully raise the fuel tank back into its position, securing it with the straps.
8. Reconnect the fuel lines and electrical connectors: Double-check all connections.
9. Reconnect the negative battery terminal.
10. Prime the fuel system: Some vehicles require priming the fuel system after a fuel pump replacement. Your repair manual will detail how to do this. It might involve cycling the ignition switch a few times or using a priming tool.
11. Check for leaks: Once you've reconnected everything, inspect all connections for leaks. Start the engine and check again.
12. Replace the fuel filter: As mentioned earlier, this is a good idea while you're already working on the fuel system.
Important Notes:
* This is a simplified overview. Specific steps and procedures can vary depending on your truck's exact configuration. Always refer to a repair manual specific to your 1988 Chevy C10 with a 350 engine.
* If you're not comfortable performing this repair yourself, it's best to take your truck to a qualified mechanic. Improperly installing a fuel pump can lead to serious safety hazards.
This detailed procedure should give you a better understanding of what's involved. Remember to always prioritize safety and consult a reliable repair manual for your specific vehicle model before beginning the repair.
