Here's a general outline; specific steps may vary slightly depending on your Blazer's engine and trim level. Consult a repair manual specific to your 1997 Chevy Blazer for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment for this type of repair.
Tools You'll Likely Need:
* Socket set (metric)
* Wrenches (metric)
* Screwdrivers (Phillips and flathead)
* Fuel pump pliers (or a fuel line disconnect tool)
* Jack and jack stands
* Safety glasses
* Gloves
* Rags
* Torque wrench (highly recommended)
* Fuel pump replacement kit (this usually includes the pump, filter, and gaskets/seals)
* Possibly a fuel pressure gauge (to verify correct pressure after installation)
General Steps:
1. Safety First: Disconnect the negative battery terminal.
2. Lower the Fuel Tank: This is usually the most challenging part. You'll need to access the fuel pump through the access panel on top of the tank (some models may require dropping the entire tank). This typically involves:
* Supporting the tank with jack stands. Refer to your repair manual for the correct jacking points to avoid damage.
* Removing any retaining straps or bolts securing the tank.
* Disconnecting the fuel lines, electrical connector, and fuel level sender. Be prepared for some fuel spillage; have rags ready.
* Carefully lowering the fuel tank. It's usually heavy, so enlist help if necessary.
3. Access the Fuel Pump: Once the tank is accessible (partially or fully lowered), locate the fuel pump access panel or remove the fuel pump assembly from the top of the tank.
4. Disconnect the Fuel Pump: Carefully disconnect the electrical connector and the fuel lines. Use fuel line pliers to avoid damage to the lines. Again, expect some fuel spillage.
5. Remove the Fuel Pump: The fuel pump is usually held in place by a retaining ring or clamp. Remove this to access the pump.
6. Install the New Fuel Pump: Reverse the removal process, ensuring all seals and gaskets are properly seated. Carefully connect the electrical connector and fuel lines.
7. Raise the Fuel Tank (if necessary): Carefully raise the fuel tank back into position, securing it with the straps and bolts.
8. Reconnect the Fuel Lines and Electrical Connector: Double-check all connections.
9. Reconnect the Battery: Reconnect the negative battery terminal.
10. Prime the Fuel System: You may need to crank the engine (with the ignition on) for a few seconds to prime the fuel system before starting the engine.
11. Check for Leaks: Inspect all connections for leaks.
12. Test Drive: Test drive the vehicle to ensure the fuel pump is functioning correctly. Check for any issues with fuel delivery or engine performance.
Important Considerations:
* Fuel Pressure: After installation, you may want to test fuel pressure using a fuel pressure gauge to confirm the new pump is delivering the correct pressure.
* Fuel Filter: It's a good idea to replace the fuel filter at the same time as the fuel pump.
* Professional Help: If you're not comfortable working with gasoline or performing this type of repair, it's best to take your Blazer to a qualified mechanic.
This is a simplified overview. Always refer to your vehicle's repair manual for detailed instructions and torque specifications. Failing to follow the correct procedure can lead to damage to your vehicle or personal injury.
