Where is the fuse on a 1990 Chevy Silverado fuel pump?

The fuse for the fuel pump on a 1990 Chevy Silverado is located in the engine bay's under-hood fuse/relay center. Look for a fuse labeled FUEL PUMP (or FP) and expect a 15-amp rating. The fuel pump itself sits inside the fuel tank and is powered through this circuit.

How the fuel pump circuit works

The fuel pump lives in the fuel tank. It is powered through a fuse and, in many configurations, a dedicated fuel pump relay in the under-hood fuse center. The engine control module (PCM) or ignition switch controls the relay, so if the fuse or relay fails, the pump won’t run and the vehicle may not start or could stall. The fuse protects the circuit from overcurrents and shorts.

Locating the fuse block in the engine bay

In most 1990 Silverado models, the under-hood fuse/relay center is mounted in the engine compartment on the driver’s side, near the firewall or inner fender. The cover features a diagram showing each fuse and relay label. If you see labels such as FUEL PUMP, FUEL PUMP RELAY, or FP, you’ve located the right circuit.

Now the step-by-step to locate and inspect the fuse.

1. Park on a level surface, engage the parking brake, and turn off the ignition. Open the hood and locate the under-hood fuse/relay center.


2. Remove the fuse block cover to reveal the fuse map or diagram.


3. Identify the fuse labeled FUEL PUMP, FUEL PUMP RELAY, or FP (the exact label can vary by production date).


4. Inspect the fuse: a blown fuse will have a broken metal strip inside. If blown, replace it with a fuse of the same amperage (typically 15A).


5. If the fuse looks intact but the pump won’t run, test or swap the fuel pump relay with a similar, known-good relay to determine if the relay is faulty.


6. With the replacement fuse/relay in place, turn the key to the RUN position (do not start) and listen for a brief pump prime, or verify fuel pressure with a gauge to confirm operation.

If the fuse continues to blow or the pump still doesn’t operate after these checks, there may be a short, wiring issue, or the pump itself could be near the end of its life. Consider professional diagnostic help.

Alternative labels you might see

Some fuse blocks use different labels or group the fuel circuit under variations. Review the diagram on the fuse block cover to confirm the exact designation for your truck.

• FUEL PUMP


• FUEL PUMP RELAY


• FP


• FP PWR

When in doubt, the fuse block diagram or the owner's manual is the best reference for your specific vehicle configuration.

Why this matters

Understanding the exact location and labeling helps you troubleshoot starting or running issues quickly. Since the fuel pump is installed inside the tank, the accessible points for diagnosis are the fuse and the relay in the under-hood fuse block rather than the pump itself.

Summary

For a 1990 Chevy Silverado, the fuel pump fuse is found in the engine bay’s under-hood fuse/relay center and is usually labeled FUEL PUMP (or FP), with a typical 15-amp rating. The fuel pump resides in the tank and is controlled by this circuit through a relay. Always refer to the fuse block cover diagram for your exact labeling and rating, and replace blown fuses with the same amperage to avoid damage.

Where is the fuel pump fuse located?

The fuel pump fuse is typically located in one of the vehicle's fuse boxes, which are often found under the hood or inside the passenger compartment near the steering column or in the trunk. You must consult your vehicle's owner's manual to find the specific location and diagram for your car. 
This video shows the general location of the fuel pump fuse and relay: 58sLehewYouTube · Nov 3, 2019
Steps to find the fuel pump fuse

1. Locate the fuse boxes: Most vehicles have more than one fuse box. Common locations include under the hood, beneath the dashboard near the steering wheel, or in the trunk. 
2. Consult the owner's manual: The owner's manual will have a diagram or list that shows the exact location of the fuel pump fuse within a specific fuse box. 
3. Open the fuse box: Open the lid of the correct fuse box. A diagram on the inside of the lid will also help you find the fuse. 
4. Identify the fuel pump fuse: Look for the fuse labeled as the "fuel pump" or an equivalent symbol in the diagram. 
5. Inspect the fuse: Use a fuse puller (often found in the fuse box) to remove the fuse and visually inspect it. If the metal strip inside is broken, the fuse is blown and needs to be replaced. 

You can watch this video to see how to inspect the fuel pump fuse: 56sCarsNToysYouTube · Mar 29, 2023

Where is the fuel gauge fuse on a 1990 Chevy Silverado?

The fuse is in the fuse block ,under the drivers side dash.It will be marked "fuel pump" or "ECM- B". If your problem is a no start, it is most likely a failed fuel pump.

How to tell if a fuel pump fuse is blown?

A blown fuel pump fuse typically causes the engine to fail completely, resulting in symptoms like the engine not starting at all (cranking but not starting) or the engine stalling unexpectedly while driving. You may also notice a lack of the normal buzzing sound from the fuel pump when you turn the key, or hear other sounds like sputtering, hesitation, or poor performance. 
Symptoms of a blown fuel pump fuse

• Engine won't start: This is the most common symptom. The engine will crank but not fire up because the fuel pump isn't getting power. 
• Engine stalls: The engine may suddenly cut out while driving, or it could stall while idling. 
• No fuel pump sound: You won't hear the usual faint humming or buzzing sound from the fuel tank area when you turn the key to the "on" position. 
• Hesitation or sputtering: While a blown fuse often causes a complete failure to start, an intermittent or partially failing circuit can cause the engine to hesitate, sputter, or run poorly before failing entirely. 
• Check engine light: A blown fuse can cause the check engine light to illuminate, sometimes with specific codes related to the fuel pump circuit. 
• Sudden loss of power: If the fuse failure is intermittent, you might experience a sudden drop in power before the engine stalls or the fuse blows completely. 

What to do

• Inspect the fuse: The first step is to locate the fuse box and inspect the fuel pump fuse for a broken wire or a blown connection. 
• Check other components: Since a blown fuse can indicate an underlying problem, a mechanic will also check the fuel pump itself, the fuel pump relay, and the wiring for any shorts or other failures. 
• Do not keep replacing the fuse: Simply replacing a blown fuse without addressing the root cause will likely result in the new fuse blowing again immediately, as it indicates an electrical short or an over-taxed component. 

Where is the fuel pump fuse on a Chevy 1500?

Silverado. This is the windshield. Side passenger side driver's. Side. If we zoom in guys here. Okay the first fuse that you need to check is known as fuse number 21.