1997 Chevy Blazer Fuel Pump Fuse: Location, Replacement, and Troubleshooting Guide

If your 1997 Chevy Blazer cranks but won't start, or if it stalls unexpectedly while driving, the fuel pump fuse is one of the first things you should check. Here is the bottom line: the fuel pump fuse on a 1997 Chevy Blazer is located in the under-hood fuse box (also called the engine compartment fuse block), and it is fuse number 9, a 20-amp MINI fuse. Replacing a blown fuse is a quick, cheap fix that can save you a costly tow. But if the fuse keeps blowing, you likely have a deeper problem with the fuel pump or the wiring. Let us walk you through everything you need to know, from finding the fuse to replacing the pump itself.

Where Is the 1997 Chevy Blazer Fuel Pump Fuse Located?

The exact location of the fuel pump fuse on a 1997 Chevy Blazer depends slightly on whether you have the 4.3L V6, 5.7L V8, or another engine, but it is almost always in the same place. The fuel pump fuse is located in the engine compartment fuse block, which is under the hood near the battery.

Step-by-step to find the fuse:

  1. Open the hood and look for the black plastic fuse box near the driver-side fender, right next to the battery.
  2. Remove the cover of the fuse box. On the inside of the cover, there is a diagram that shows the location and function of each fuse and relay.
  3. Look for a fuse labeled "Fuel Pump" or check the diagram for fuse number 9. According to the factory fuse box diagram, fuel pump power is supplied through fuse number 9 in the engine compartment fuse block.
  4. The fuse is a standard MINI 20-amp fuse. If you are unsure, pull the cover and look for a small plastic fuse puller inside the box, or use a pair of needle-nose pliers.

Where is the fuel pump relay? The fuel pump relay is also in the same under-hood fuse box. It is usually labeled "Fuel Pump Relay" on the diagram. On some models, it may be a separate relay inside the box. If the fuse is good but the pump still does not run, the relay could be the culprit.

How to Check the Fuel Pump Fuse

Checking the fuel pump fuse is simple and requires no special tools. Here is what to do:

  1. Turn off the engine and remove the key from the ignition.
  2. Locate the fuse as described above.
  3. Pull the fuse out using the fuse puller or pliers. Look at the metal strip inside the fuse. If the strip is broken or melted, the fuse is blown.
  4. Use a test light or multimeter (optional): If you have a test light, clip it to a ground source and touch the probe to each of the two small metal tabs on top of the fuse (with the fuse still in place and the ignition on). If both tabs light up, the fuse is good. If only one side lights up, the fuse is blown.

Important safety note: Before working on any electrical component, disconnect the negative battery cable to prevent accidental sparks or short circuits. Fuel is highly flammable, so work in a well-ventilated area and keep a fire extinguisher nearby.

What to Do If the Fuel Pump Fuse Blows

If you find that the fuel pump fuse is blown, replacing it is easy. But do not just put a new fuse in and walk away. A blown fuse is a symptom, not a cause. Here is how to handle it:

  1. Replace the fuse with the same amperage (20-amp). Never use a higher-rated fuse, as it can damage the wiring or cause a fire.
  2. Try starting the engine. If the engine starts and runs fine, the problem was likely a temporary electrical surge or a one-time overload. Keep an eye on it.
  3. If the new fuse blows immediately, you have a short circuit or a failing fuel pump. The most common reasons for a repeatedly blown fuse are:
    • A failing fuel pump motor that is drawing too much current (common on high-mileage Blazers)
    • A short in the fuel pump wiring harness (wires rubbing against the frame or getting pinched)
    • A bad fuel pump relay that is stuck closed
    • A corroded ground connection at the fuel pump module

When to test the fuel pump itself: If the fuse looks good but the engine still will not start, the problem may be a dead fuel pump, a bad relay, or a clogged fuel filter. The next step is to listen for the fuel pump. When you turn the key to the "ON" position (without starting the engine), you should hear a quiet humming sound coming from the rear of the vehicle for about 2 seconds. That is the fuel pump priming. If you do not hear anything, the pump is not getting power or it is dead.

How to Replace a Fuel Pump on a 1997 Chevy Blazer

If you have confirmed that the fuse is good, the relay is clicking, and the pump is still not working, you likely need to replace the fuel pump. Replacing a fuel pump on a 1997 Chevy Blazer is an intermediate-level DIY job. The pump is inside the fuel tank, which means you either need to drop the tank or access it through the top of the tank (which usually requires dropping the tank on this model).

Here is an overview of the process:

  1. Relieve fuel system pressure: Locate the fuel pump fuse or relay, remove it, and start the engine. Let it run until it stalls. This depressurizes the system.
  2. Disconnect the battery: Always disconnect the negative battery terminal before working on the fuel system.
  3. Drop the fuel tank: On the 1997 Blazer, the fuel pump is accessed by removing the fuel tank. Support the tank with a jack, disconnect the filler neck, hoses, and electrical connectors, then lower the tank carefully.
  4. Remove the old pump: Disconnect the electrical harness and fuel lines. Use a special tool to release the locking ring that holds the pump module in place. Lift the module out carefully.
  5. Install the new pump: If you are replacing just the pump, transfer the strainer, sending unit, and gasket to the new pump. If you are using a complete assembly like a KEMSO unit, it is a direct swap. Lower the new module into the tank, secure the locking ring, and reconnect the lines and harness.
  6. Test the system: Reconnect the battery, turn the key to the ON position, and listen for the pump prime cycle. Start the engine and check for leaks.

Safety tip: Fuel is flammable. Work in a well-ventilated area, avoid smoking, and keep a fire extinguisher nearby. If you are not comfortable dropping the tank or working with fuel, have a professional mechanic do the replacement.

Why You Should Consider a KEMSO Fuel Pump for Your 1997 Chevy Blazer

When it is time to replace the fuel pump on your 1997 Chevy Blazer, you want a part that is reliable, affordable, and built to last. That is where KEMSO comes in. KEMSO is a trusted brand in the automotive and powersports industries, known for manufacturing high-quality fuel pumps that meet or exceed OEM standards.

Here is why KEMSO is the right choice for your Blazer:

  • High Performance and OEM Replacement: KEMSO fuel pumps are designed as direct-fit replacements for your stock OEM pump. They deliver higher flow rates, with some models offering up to 340 liters per hour, compared to the original 60-80 LPH. This means your engine gets the fuel it needs, whether you are daily driving or towing.
  • Lifetime Warranty: Every KEMSO fuel pump comes with a lifetime warranty. If the pump ever fails due to a manufacturing defect, you get a replacement at no cost. This is rare in the automotive parts industry and shows KEMSO's confidence in their product.
  • USA-Based Support: KEMSO is headquartered in Houston, Texas, and their support team is staffed by USA-based technicians. If you have questions about fitment or installation, you can get help from people who know the product.
  • Affordable Pricing: Most KEMSO fuel pumps are priced at just $79.98, which is often less than half the cost of dealer parts. For a 1997 Chevy Blazer, this is a significant saving compared to other aftermarket options.
  • Built for Gasoline and E85: KEMSO pumps are designed for both gasoline and ethanol blends, making them versatile for any fuel you use.

Visit KEMSO Racing today to see the full selection of fuel pumps for your 1997 Chevy Blazer and other vehicles. Their website has a complete catalog with detailed fitment information, customer reviews, and technical support. Whether you need a pump for a car, truck, motorcycle, or ATV, KEMSO has you covered.

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Common Symptoms of a Bad Fuel Pump on a 1997 Chevy Blazer

Before you start replacing fuses or pumps, it helps to know what a failing fuel pump sounds and feels like. Here are the most common signs that your fuel pump is going bad:

  1. Engine cranks but will not start: This is the classic symptom. The starter turns the engine over, but there is no fuel pressure, so the engine never fires.
  2. Whining noise from the fuel tank: A healthy fuel pump makes a quiet hum. If you hear a loud whining or buzzing sound coming from the rear of the vehicle, especially when you turn the key to the ON position, the pump is struggling.
  3. Sputtering at high speeds: If your Blazer hesitates, stutters, or loses power when you accelerate or drive uphill, the fuel pump may not be delivering enough fuel.
  4. Sudden stalling: A failing fuel pump can cause the engine to die unexpectedly while driving, especially in hot weather or after a long trip.
  5. Loss of power under load: If your Blazer feels sluggish when climbing hills or carrying a heavy load, the fuel pump might be unable to maintain adequate pressure.

Did you know? Fuel pump problems are often misdiagnosed as a bad battery, alternator, or starter. If your engine cranks but does not start, check the fuel pump fuse first, then listen for the pump. It is a quick way to rule out the fuel system.

Troubleshooting the 1997 Chevy Blazer Fuel System

Here is a simple step-by-step troubleshooting guide to help you figure out what is wrong:

Step 1: Check the fuel pump fuse.

  • Location: Under-hood fuse box, fuse #9 (20-amp MINI).
  • If blown, replace it. If it blows again, check for a short circuit or a failing pump.

Step 2: Check the fuel pump relay.

  • Location: Same fuse box, labeled "Fuel Pump Relay."
  • You can swap the relay with a similar one (like the horn relay) to test if it works. If the pump starts working, the relay is bad.

Step 3: Listen for the fuel pump.

  • Turn the key to the ON position (do not start the engine). Listen near the rear of the vehicle or under the rear seat. You should hear a 2-second hum.
  • If you hear nothing, the pump is not getting power or it is dead.

Step 4: Test fuel pressure.

  • Use a fuel pressure gauge to check the pressure at the fuel rail. For a 1997 Chevy Blazer, the pressure should be between 56-62 psi (depending on the engine). If it is low, the pump is likely failing.

Step 5: Check the fuel filter.

  • A clogged fuel filter can mimic a bad fuel pump. If the filter is old, replace it before you replace the pump. The fuel filter is usually mounted along the frame rail under the vehicle.

KEMSO Fuel Pump: Final Thoughts

If you have determined that your 1997 Chevy Blazer needs a new fuel pump, do not settle for a cheap, unreliable part. KEMSO offers a high-performance, direct-fit replacement that comes with a lifetime warranty and USA-based support. For just $79.98, you get a pump that outperforms the stock unit and is built to last.

Visit KEMSO Racing at https://www.kemsoracing.com/ to browse their full selection of fuel pumps. Their website is easy to navigate, and you can order directly with confidence. Whether you drive a Chevy Blazer, a Subaru Impreza, a Honda Civic, or a Kawasaki Jet Ski, KEMSO has a fuel pump that will work for you.

Summary

To summarize what you need to know about the 1997 Chevy Blazer fuel pump fuse:

  • Location: Engine compartment fuse box, fuse #9, 20-amp MINI fuse.
  • Relay location: Same fuse box, labeled "Fuel Pump Relay."
  • Common fix: If the fuse is blown, replace it. If it blows again, replace the fuel pump.
  • Best replacement pump: KEMSO fuel pump, $79.98, lifetime warranty, direct fit.

If you are experiencing hard starting, stalling, or loss of power, check the fuse and relay first. They are cheap and easy to replace. If those are good, the fuel pump itself is the likely culprit. Replacing it yourself is doable with the right tools and instructions, but if you are not confident, take it to a professional. Either way, using a quality pump like KEMSO will give you peace of mind and keep your 1997 Chevy Blazer running reliably for years to come.

For more information and to order your KEMSO fuel pump, visit: https://www.kemsoracing.com/


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