Katerina Swanson
If you're experiencing problems with your 1997 Chevy Blazer fuel pump, you may need to replace it. A faulty fuel pump can cause a decrease in fuel pressure, leading to a decline in performance and fuel economy. While it is recommended that you let a repair shop handle the replacement, it is possible to do it yourself. The process involves disconnecting the battery, relieving fuel system pressure, disconnecting the negative battery cable, raising the vehicle on a hoist, removing the fuel tank, and then removing and replacing the fuel pump and sender unit. When replacing the fuel pump, it is important to inspect the fuel pump attaching hose, rubber insulator, and strainer for any signs of damage or deterioration. Additionally, be sure to follow the correct installation procedure to avoid restricting fuel flow.
| Characteristics | Values |
|---|---|
| Vehicle | 1997 Chevrolet Blazer |
| Engine | V6 4.3L |
| Fuel pump function | Suck fuel from the tank, pressurize it, deliver it to the fuel supply pipe, and cooperate with the fuel pressure regulator to establish fuel pressure |
| Fuel pump removal procedure | 1. Relieve fuel system pressure. 2. Disconnect the negative battery cable. 3. Raise the vehicle on a hoist. 4. Remove the fuel tank. 5. Remove the sender unit and pump by turning the cam lock counterclockwise. 6. Remove the fuel pump from the sending unit. |
| Fuel pump installation procedure | 1. Install the fuel pump assembly into the attaching hose. 2. Install the sending unit and fuel pump assembly into the fuel tank. 3. Insert a new O-ring seal. 4. Install the cam lock assembly. 5. Turn the cam lock clockwise to lock it. 6. Install the fuel tank. 7. Connect the negative battery cable. 8. Check the system for leaks. |
| Fuel pump replacement cost | Between $743 and $841 |
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What You'll Learn
Disconnect the negative battery cable
Disconnecting the negative battery cable is one of the first steps you should take when replacing the fuel pump in a 97 Blazer. Here is a detailed, step-by-step guide on how to do this safely and effectively:
Step 1: Relieve Fuel System Pressure
Before disconnecting the battery cable, it is important to relieve the fuel system pressure. Refer to your vehicle's fuel pressure release instructions for specific guidance on how to do this. This step is crucial for safety and should not be skipped.
Step 2: Locate the Negative Battery Cable
The negative battery cable is usually black and is connected to the negative terminal of the battery. It is often marked with a "-" symbol or a black cover. Make sure you have identified the correct cable before proceeding.
Step 3: Disconnect the Cable
Once you have located the negative battery cable, you can now disconnect it. First, loosen the nut or bolt that secures the cable to the battery terminal using an appropriate-sized wrench or socket. Do not remove it completely yet. If the connection is tightly secured, you may need to use a battery terminal puller to safely loosen it.
Step 4: Protect the Cable
After loosening the connection, place a piece of tape or a cable cover over the end of the negative cable to prevent accidental contact with the battery terminal. This is an important safety precaution.
Step 5: Final Removal
Now, you can completely remove the negative battery cable from the battery terminal. Make sure the cable does not touch any metal parts of the vehicle to avoid creating a spark or short circuit. Set the cable aside in a safe place where it will not cause any accidental connections.
Step 6: Secure the Vehicle
With the negative battery cable disconnected, it is important to ensure that the vehicle is securely raised on a hoist or jack stands before proceeding with the fuel pump replacement. Always follow proper safety procedures when working underneath a vehicle.
Remember to reconnect the negative battery cable once you have completed the fuel pump replacement and lowered the vehicle. Tighten the connection securely and remove any protective coverings or tape.
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Raise the vehicle with a hoist
To replace the fuel pump in a 1997 Chevy Blazer, you will need to raise the vehicle using a hoist. Here is a detailed, step-by-step guide to doing this safely and effectively:
Firstly, ensure you are wearing the appropriate personal protective equipment (PPE), including safety glasses and gloves. Prepare your workspace by selecting a flat, level surface with ample space. Check the hoist for any signs of damage or wear and tear, and ensure all safety features are functioning correctly. Refer to the manufacturer's instructions for your specific hoist, and look up the service precautions and instructions for your vehicle. This information can usually be found in the owner's manual or online.
Now, position your Blazer in front of the hoist, ensuring there is enough clearance on all sides. Engage the parking brake and, if applicable, place wheel chocks behind the tires as a secondary safety measure to prevent accidental rolling.
Carefully drive the Blazer onto the hoist, ensuring it is aligned with the lifting arms. Adjust the hoist arm pads to keep the vehicle level when raised. Swing the arms under the vehicle, positioning them under the specified lift points. You may need to raise and lower the hoist to get the arms in the correct spot.
Once the hoist is set, perform a 'shake test' to ensure the vehicle is secure. Lift the vehicle a few inches off the ground, then jounce the front and back to ensure it is sturdy. Continue to lift to the desired height.
Now you can begin the fuel pump replacement process. Remember to relieve the fuel system pressure and disconnect the negative battery cable before raising the fuel tank. Extreme care must be taken when lowering the fuel tank, as the fuel sender is made of plastic and can be easily damaged.
Please note that this is a complex task and there are many potential hazards. It is important to follow safety precautions and instructions carefully to avoid damage or injury.
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Remove the fuel tank
To remove the fuel tank from a 1997 Chevy Blazer, follow these steps:
First, relieve the fuel system pressure and disconnect the negative battery cable. Next, raise the vehicle on a hoist. When lowering the fuel tank, do so with extreme care as the fuel sender is made of plastic and may be damaged.
Now, you need to remove the fuel tank. To do this, you must first remove the support straps and insulators. If equipped, also remove the fuel tank shield. Lower the tank until the gauge wiring, electrical connections, and all hoses can be removed.
If you are having trouble removing the gas tank straps, try the following:
- Run some oil, such as WD40, on the bolts and let it sit for about 20 minutes before trying again.
- Check that the bolts are not bent, as this will prevent them from coming off.
- Try using vice-grips to turn the bolts from the bottom, unless the head is still in the other half. In this case, you can purchase a multi-positional head ratchet handle to gain access.
Once the tank is removed, you can then remove the sender unit and pump by turning the cam lock counterclockwise using tool J36608.
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Remove the sender unit and pump
To remove the sender unit and pump, follow these steps:
First, relieve the fuel system pressure and disconnect the negative battery cable. Next, raise the vehicle on a hoist. When lowering the fuel tank, exercise extreme caution as the fuel sender is made of plastic and prone to damage. Remove the fuel tank.
Now, to remove the sender unit and pump, turn the cam lock counterclockwise using tool J36608. Pull the fuel pump up into the attaching hose while simultaneously pulling outward from the bottom support. Be careful not to damage the rubber insulator or the strainer.
Finally, inspect the fuel pump attaching hose, the rubber sound insulation at the bottom of the pump, and the strainer for any signs of deterioration.
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Check for leaks
After you have finished installing the new fuel pump, check the system for leaks. This is a crucial step in the replacement process, as fuel leaks can be dangerous.
First, reconnect the negative battery cable. Then, start the vehicle and inspect the fuel pump attaching hose for any signs of deterioration. Also, inspect the rubber sound insulation at the bottom of the pump and the strainer for any damage. Make sure to check all connections and fittings for leaks. If you notice any leaks, tighten the connections or replace any damaged parts.
It is important to be cautious and thorough during this step to ensure that there are no fuel leaks before operating the vehicle.
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Frequently asked questions
First, relieve the fuel system pressure and disconnect the negative battery cable. Then, raise the vehicle with a hoist and remove the fuel tank carefully, as the fuel sender is made of plastic and may be damaged. Remove the sender unit and pump by turning the cam lock counterclockwise using tool J36608. Pull the fuel pump up into the attaching hose while pulling outward from the bottom support, being careful not to damage the rubber insulator or the strainer.
A failing fuel pump will not create enough pressure in the fuel system, possibly causing a loss of engine power or preventing the car from starting. It may also cause the check engine light to come on.
The average cost for a fuel pump replacement in a Chevrolet Blazer is between $743 and $841. Labor costs are estimated between $170 and $214, while parts are priced between $573 and $626.
