Replacing the fuel pump is NOT a beginner-level repair. It requires specialized tools and a good understanding of automotive repair procedures. If you're not comfortable working with fuel systems (highly flammable!), I strongly recommend taking your Blazer to a qualified mechanic. Improper handling of fuel can lead to serious injury or even death.
Here's a general overview of the process. Again, this is NOT a complete guide, and omitting even one critical step could be dangerous:
1. Safety First: Disconnect the negative battery terminal. Work in a well-ventilated area away from any ignition sources. Consider using safety glasses and gloves.
2. Fuel Tank Depressurization: You need to relieve the pressure in the fuel system. This usually involves turning the ignition key to the "ON" position several times (without starting the engine) to run the fuel pump and exhaust the pressure. Consult your repair manual for the specific procedure for your Blazer.
3. Lower the Fuel Tank: This requires access to the fuel tank straps and possibly the exhaust system, depending on the model. You'll need jack stands to support the vehicle safely, and you will probably need to disconnect and support the exhaust system in some way. You might also need to disconnect the fuel filler neck and fuel lines.
4. Access the Fuel Pump: Once the tank is lowered, you'll see the fuel pump assembly. There's usually a retaining ring or bolts that hold it in place.
5. Disconnect Electrical Connections: Carefully disconnect the electrical connectors leading to the fuel pump. This will usually involve releasing clips or push-pin connectors.
6. Remove the Fuel Pump Assembly: Remove the retaining ring or bolts to access the fuel pump module. This is often the whole assembly that the pump is inside.
7. Replace the Fuel Pump: Install the new fuel pump assembly, ensuring it seats correctly.
8. Reassemble Everything: Reconnect all electrical connections, fuel lines, the fuel tank straps, the fuel filler neck, and the exhaust system. Carefully raise the fuel tank back into position and secure it.
9. Reconnect the Battery: Reconnect the negative battery terminal.
10. Test: Start the vehicle and check for leaks.
Before attempting this repair:
* Consult a repair manual specific to your 2000 Chevrolet Blazer. This manual will provide detailed instructions and diagrams, crucial for this complex repair.
* Gather the necessary tools. You'll likely need jack stands, socket wrenches, fuel line disconnect tools, possibly a fuel pump retaining ring tool, and safety glasses/gloves.
* Consider the cost. Weigh the cost of the parts and your time against the cost of having a professional mechanic perform the repair.
Again, if you are not experienced in automotive repair, particularly fuel system repair, do not attempt this yourself. Seek professional help to avoid injury and damage to your vehicle.
