Here's a general overview. Always disconnect the negative battery cable before starting any fuel system work.
1. Safety First:
* Disconnect the negative battery cable. This is crucial to prevent sparks and potential fire hazards.
* Ventilate the area. Fuel vapors are flammable and potentially explosive. Work in a well-ventilated area, away from any open flames or sparks.
* Use proper safety glasses and gloves.
2. Preparation:
* Gather tools: You'll need a variety of tools including wrenches (socket set is best), jack stands, jack, fuel line disconnect tools, safety glasses, gloves, possibly a fuel pump removal tool, and possibly a torque wrench. A shop manual specific to your 1988 S10 Blazer FWD is highly recommended.
* Drain the fuel tank: This is a significant safety precaution and makes the job easier. You can siphon the fuel out carefully into an approved container.
* Locate the fuel tank: It's typically under the rear passenger compartment.
3. Accessing the Fuel Tank:
* Raise the vehicle safely: Use jack stands to support the vehicle securely after jacking it up. Never work under a vehicle supported only by a jack.
* Remove the fuel filler neck: This may involve removing screws or bolts holding the filler neck in place. Refer to your shop manual.
* Lower the fuel tank: You'll likely need to disconnect the fuel lines, the fuel tank sending unit, and possibly other components connected to the tank. These connections may be secured with clips, clamps, or bolts. Your shop manual will specify exactly which connections need to be disconnected and how to do so safely. You might need to support the tank while it's lowered as it can be heavy when full.
4. Replacing the Fuel Pump:
* Once the tank is lowered, you should have access to the fuel pump assembly. This usually involves removing a retaining ring or cover. Your shop manual will guide you through this process.
* Disconnect the electrical connector to the fuel pump.
* Remove the fuel pump assembly. This is usually done by removing several bolts securing it to the tank. A fuel pump removal tool can be helpful.
* Install the new fuel pump assembly: Make sure to follow the manufacturer's instructions.
* Reconnect the electrical connector.
5. Reassembly:
* Raise the fuel tank back into place.
* Reconnect all fuel lines, electrical connections, and other components that were disconnected. Double-check everything.
* Reinstall the fuel filler neck.
* Lower the vehicle.
* Reconnect the negative battery cable.
* Check for leaks and verify correct operation.
Important Notes:
* This is a complex procedure. It's strongly recommended to consult a repair manual specific to your 1988 Chevy S10 Blazer FWD. The steps and specific components might vary slightly depending on the exact model and trim level.
* Fuel is flammable and dangerous. Take all necessary precautions to avoid fires or explosions.
* If you are not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. This is a job best done by someone with experience.
This is a general guideline. You absolutely need a shop manual specific to your vehicle year, make, and model. Attempting this repair without one is strongly discouraged. The manual will provide detailed diagrams, instructions, and torque specifications that are crucial for a successful and safe repair.
