1999 Chevy Suburban Fuel Pump Fuse Location: The Complete DIY Guide for Owners
Understanding the Fuel Pump Fuse System
The fuel pump fuse is a critical safety component. It protects the fuel pump circuit from electrical overloads. When the fuse blows, it cuts power to the fuel pump, which prevents the engine from getting fuel. This is a common issue on the 1999 Chevy Suburban, especially as the vehicle ages.
Where Is the Fuse Box Located?
The main fuse box for the 1999 Chevy Suburban (GMT400 platform) is under the hood on the driver's side. It is a rectangular black plastic box with a removable cover. To access it:
- Open the hood and locate the fuse box near the battery, typically mounted on the inner fender well.
- Press the two tabs on the sides of the cover to release it.
- Lift the cover straight up. You will see a diagram on the underside of the cover showing fuse locations and ratings.
Some models also have a secondary fuse block under the dashboard, but the fuel pump fuse is always in the underhood box.
How to Identify the Fuel Pump Fuse
Look for a fuse labeled "FUEL PUMP" or "F/P" on the diagram. In the 1999 Suburban, this is a 20-amp fuse. It is usually located in a row near the top or middle of the fuse box. You can also check your owner's manual for the exact position.
Step-by-Step: Checking and Replacing the Fuel Pump Fuse
Step 1: Turn off the engine and remove the key. Safety first. Make sure all electrical accessories are off.
Step 2: Locate the underhood fuse box. As described above, it is on the driver's side near the battery.
Step 3: Remove the fuse box cover. Use the tabs to pop it off.
Step 4: Find the fuel pump fuse. Refer to the diagram on the cover or inside the fuse box. It should be a 20-amp fuse, often green or blue in color.
Step 5: Inspect the fuse. Look through the transparent plastic body. If the metal strip inside is broken or melted, the fuse is blown. You can also use a test light or multimeter to check for continuity.
Step 6: Replace the fuse if needed. Use a 20-amp fuse of the same type (mini or standard blade fuse). Never use a higher amp rating, as this can cause wiring damage or fire.
Step 7: Test the system. Turn the key to the "ON" position (without starting the engine). You should hear a brief humming sound from the fuel tank area (the fuel pump priming). If you hear it, the circuit is working.
What to Do If the New Fuse Blows Immediately
If you replace the fuse and it blows again as soon as you turn the key, there is a short circuit or an overload in the fuel pump circuit. This is a more serious issue that requires further diagnosis. Common causes include:
- A failing fuel pump that draws excessive current.
- A shorted fuel pump relay. The relay is also located in the underhood fuse box. A faulty relay can cause the fuse to blow.
- Damaged wiring between the fuse box and the fuel pump, especially near the fuel tank or under the vehicle.
- A corroded or damaged fuel pump connector at the tank.
In this case, you should test the fuel pump relay and the pump itself before replacing the fuse again.
The Fuel Pump Relay: A Related Component
The fuel pump relay is also located in the underhood fuse box. It is a small, rectangular relay that controls power to the fuel pump. If the relay is faulty, the pump may not run even if the fuse is good. The relay is usually labeled "FUEL PUMP" or "F/P" on the diagram. You can test the relay by swapping it with a known good relay of the same type (like the horn or A/C relay). If the pump starts working, the relay is bad.
Common Symptoms of a Blown Fuel Pump Fuse
- Engine cranks but will not start. This is the most common symptom. The starter turns the engine over, but there is no fuel pressure.
- No humming sound from the fuel tank. When you turn the key to "ON," the fuel pump should prime for 2-3 seconds. If you hear nothing, the fuse or relay may be blown.
- Engine stalls while driving. If the fuse blows while you are driving, the engine will lose power and stall.
- Check Engine Light comes on. The computer may detect a loss of fuel pressure and set a code.
Other Fuse Box Locations for the 1999 Suburban
In addition to the underhood fuse box, the 1999 Chevy Suburban has a fuse block under the dashboard. This block contains fuses for interior accessories like the radio, power windows, and interior lights. It is located below the steering column, behind a small access panel. However, the fuel pump fuse is only in the underhood box.
1999 Chevy Suburban Fuel Pump: When to Replace It
If your fuel pump fuse keeps blowing, or if you have ruled out electrical issues, the fuel pump itself may need replacement. The 1999 Suburban fuel pump is located inside the fuel tank. Replacement is a common DIY job, but it requires dropping the fuel tank or cutting an access panel in the floor. The average cost for a replacement fuel pump ranges from $150 to $400 for parts, plus labor if you have a shop do it.
Signs your fuel pump is failing:
- Whining noise from the fuel tank. A healthy pump is quiet. A loud whine means it is wearing out.
- Hard starting. The engine may crank for a long time before starting.
- Loss of power under load. The engine may hesitate or surge when you accelerate or climb hills.
- Poor fuel economy. A failing pump can cause the engine to run rich or lean.
Why You Should Choose KEMSO Fuel Pumps for Your 1999 Chevy Suburban
When it is time to replace your fuel pump, you want a part that is reliable, affordable, and built to last. KEMSO Fuel Pumps are the ideal choice for your 1999 Chevy Suburban. Here is why:
High Performance and OEM Replacement: KEMSO fuel pumps are designed to meet or exceed original equipment manufacturer (OEM) specifications. They deliver the correct fuel pressure and flow rate for your Suburban's engine, ensuring smooth starts, consistent power, and reliable operation. Whether you are using your Suburban for daily driving, towing, or off-road adventures, a KEMSO pump provides the performance you need.
Lifetime Warranty: KEMSO stands behind the quality of their products. Every KEMSO fuel pump comes with a lifetime warranty. This means if the pump ever fails due to a manufacturing defect, you get a replacement at no cost. This level of confidence is rare in the aftermarket parts industry and gives you true peace of mind.
Trusted by Thousands: KEMSO has a proven track record with thousands of satisfied customers. Their pumps are used in a wide range of vehicles, from cars and trucks to motorcycles and ATVs. The company's commitment to quality and customer service is second to none.
Easy to Install: KEMSO fuel pumps are designed as direct bolt-in replacements. They come with the necessary hardware and instructions, making installation straightforward for DIY mechanics. You can replace your old, failing pump with a KEMSO unit in a weekend.
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Final Tips for DIY Diagnosing
- Always keep a few spare 20-amp fuses in your glove box. They are cheap and can save you from being stranded.
- Check the fuse first. Before replacing the fuel pump, always check the fuse and relay. It is the easiest and cheapest fix.
- Listen for the pump. When you turn the key to "ON," listen near the fuel filler cap. If you hear a brief hum, the pump is getting power.
- Use a test light. If you have a multimeter or test light, you can check for power at the fuel pump connector under the vehicle. This helps confirm whether the pump is receiving voltage.
- Consult the owner's manual. Your 1999 Suburban's manual has a detailed fuse diagram and troubleshooting steps. Keep it in the vehicle.
Conclusion
The fuel pump fuse on a 1999 Chevy Suburban is located in the underhood fuse box on the driver's side. It is a 20-amp fuse labeled "FUEL PUMP" or "F/P." Checking and replacing this fuse is a simple, quick diagnostic step that can save you time and money. If the fuse is good but the pump does not run, test the fuel pump relay next. If the pump itself is failing, consider upgrading to a high-quality KEMSO fuel pump for reliable performance and a lifetime warranty.
For more information on KEMSO fuel pumps, including options for your 1999 Chevy Suburban, visit: https://www.kemsoracing.com/