Here's a general procedure. Consult your vehicle's repair manual for specific details and torque specifications. This procedure is a guide and might vary slightly depending on your specific truck's configuration.
1. Preparation:
* Safety First: Disconnect the negative battery cable.
* Gather Tools: You'll need jack stands, jack, socket set (various sizes), wrenches, screwdrivers, fuel line disconnect tools, safety glasses, gloves, and possibly a fuel pump removal tool.
* Drain the Tank (Highly Recommended): This significantly reduces the risk of spilling fuel. Locate the fuel drain valve at the bottom of the tank and carefully drain the fuel into a suitable container.
2. Accessing the Fuel Tank:
* Raise the Truck: Safely lift the truck using a jack and secure it on jack stands. Never work under a vehicle supported only by a jack.
* Remove Access Panels: You'll likely need to remove panels under the truck bed to access the fuel tank. These are usually held in place by bolts or clips.
* Disconnect Fuel Lines: Carefully disconnect the fuel supply line, return line, and vent line. Use appropriate fuel line disconnect tools to prevent damage and spillage. You may need to relieve fuel pressure in the system before disconnecting the lines. Some vehicles have a shutoff valve near the fuel rail; use this if available. Otherwise, carefully start the vehicle and let it run until it stalls due to lack of fuel (carefully!).
* Disconnect Electrical Connections: Disconnect the fuel pump wiring harness.
3. Removing the Fuel Tank:
* Disconnect Tank Straps/Hold Downs: The fuel tank is secured by straps or bolts. Carefully remove these.
* Lower the Tank: Gently lower the fuel tank. It may be helpful to have an assistant to help support the tank's weight. This is usually the most challenging part. Be cautious of any other components that may be in the way.
4. Fuel Pump Removal:
* Access the Pump: Once the tank is out, you'll typically access the fuel pump from the top of the tank. There's usually a retaining ring that needs to be removed. You might need a special tool for this.
* Remove the Pump: Carefully remove the fuel pump assembly, paying close attention to the electrical connectors, fuel level sender, and any other components connected to the assembly.
5. Inspecting Components:
* Fuel Pump: Visually inspect the pump for damage.
* Fuel Filter: You already mentioned checking the filter.
* Fuel Strainer (sock): This is located within the fuel pump assembly and should be inspected for debris or damage. It's usually replaced during pump replacement.
* Fuel Level Sender: Check the fuel level sender for proper operation.
* Tank for Damage/Corrosion: Inspect the inside of the tank for rust, corrosion or debris.
6. Reassembly:
* Installation is the reverse of removal. Make sure all connections are secure and tight.
* Check for Leaks: Carefully inspect for any fuel leaks after reinstalling the tank and connecting the lines.
* Lower the Truck: Lower the truck.
* Reconnect the Battery: Reconnect the negative battery cable.
* Test: Run the engine and check for any leaks or issues with the fuel system.
Important Considerations:
* Repair Manual: Obtaining a repair manual specific to your 1999 S10 is highly recommended. It will provide detailed diagrams, torque specifications, and troubleshooting information.
* Fuel System Safety: Fuel is highly flammable. Always work in a well-ventilated area and avoid sparks or flames.
* Professional Help: If you are not comfortable performing this repair yourself, it's best to seek professional help from a qualified mechanic. Improperly handling the fuel system can be dangerous.
Remember, this is a general guide. Always refer to your vehicle's repair manual for detailed instructions and safety precautions.
