2020 Silverado Fuel Pump Control Module Location: A Complete Guide for Owners

If you own a 2020 Chevrolet Silverado and are experiencing starting issues, stalling, or a check engine light, the fuel pump control module (FPCM) is likely the culprit. Here is the bottom line: The FPCM on a 2020 Silverado is located underneath the vehicle, on the driver's side frame rail, typically above or near the spare tire area. The module is a small black electronic box mounted directly to the frame rail, and it controls the voltage going to your fuel pump. This guide will walk you through exactly where to find it, how to diagnose common problems, and what to do when it fails.

Where Exactly Is the FPCM on a 2020 Silverado?

The fuel pump control module on the 2020 Silverado is not inside the fuel tank—that is a common misconception. The fuel pump itself is inside the tank, but the control module is a separate component mounted externally. To locate it:

  1. Get under the truck. Raise the rear of the vehicle and support it securely on jack stands.
  2. Look at the driver's side frame rail. The module is mounted on the left side (driver's side) of the frame, in the area between the rear axle and the spare tire.
  3. Check above the spare tire. On many 2020 Silverado models, the FPCM sits directly above the spare tire, mounted to the frame rail with two bolts. You may need to lower or remove the spare tire to get a clear view.

On some GM trucks and large SUVs, the module is also sometimes found on the rear crossmember, but for the 2020 Silverado, the driver's side frame rail is the most common location. If you are still unsure, consult your owner's manual or a repair manual for your specific cab and bed configuration.

What Does the Fuel Pump Control Module Do?

The FPCM is not just a simple relay that turns the pump on and off. It is a sophisticated electronic control unit that regulates the voltage supplied to the electric fuel pump. Its job is to provide the correct fuel pressure based on engine demand. Unlike older systems, the FPCM allows for variable fuel pump speed, which improves fuel efficiency, reduces pump wear, and minimizes fuel heating. The module receives inputs from the engine control module (ECM), the fuel rail pressure sensor, and the accelerator pedal position sensor. Based on that data, it calculates the optimal fuel pump speed and sends the appropriate voltage to the pump.

Common Symptoms of a Failing FPCM in a 2020 Silverado

A failing FPCM can cause a range of frustrating problems. Here are the most common symptoms Silverado owners report:

1. Hard starting or no-start condition. If the module fails to deliver adequate voltage to the fuel pump, the engine may crank for a long time before starting, or it may not start at all.

2. Engine stalling while driving. Erratic fuel delivery caused by a faulty FPCM can lead to the engine stalling unexpectedly, especially during acceleration or when the truck is under load.

3. Reduced engine performance and poor acceleration. A lack of sufficient fuel pressure results in sluggish acceleration and a noticeable drop in overall power. Your truck may feel like it is "starving" for fuel.

4. Poor fuel economy. Inefficient fuel delivery can cause the engine to run rich or lean, leading to increased fuel consumption.

5. Check engine light. The ECM will often detect issues with the FPCM and illuminate the check engine light. Common diagnostic trouble codes (DTCs) associated with FPCM problems include P069E (Fuel Pump Control Module Commanded OFF), P0627 (Fuel Pump Control Circuit Open), P0628 (Fuel Pump Control Circuit Low), and U0109 (Lost Communication with FPCM).

6. Fuel pump running constantly. In some cases, a failing module can cause the fuel pump to run continuously, even when the engine is off, which can drain the battery.

How to Diagnose an FPCM Issue Before Replacing It

Before you buy a new module, do some basic diagnosis. Here is a step-by-step approach that will save you time and money.

Step 1: Check the fuel pump relay. The relay is a cheap and simple part that fails often. It is located in the under-hood fuse box on the driver's side. Swap it with an identical relay from the A/C compressor or horn slot. If the truck starts after the swap, the relay was bad.

Step 2: Listen for the fuel pump prime. Turn the key to the ON position (do not start the engine). Listen near the fuel tank for a 2-second humming sound. If you hear nothing, the pump is not getting power.

Step 3: Inspect the FPCM connector. The most common cause of a U0109 code is not a dead module, but a corroded or damaged wiring connector at the module itself. Unplug the connector and look for green corrosion, bent pins, or moisture. Clean the connector with electrical contact cleaner and reseat it. Many U0109 codes are resolved by simply cleaning a corroded connector.

Step 4: Check the fuses. There is a fuse for the fuel pump control module in the under-hood fuse box. Pull it out and inspect the element. If it is blown, replace it and see if the issue returns.

Step 5: Scan for codes. Use an OBD-II scanner to read any stored trouble codes. If you see P069E or U0109, the FPCM is a strong suspect.

How to Replace the Fuel Pump Control Module on a 2020 Silverado

Replacing the FPCM is a straightforward job that most DIYers can handle with basic hand tools. Here is what you need to do.

Tools needed: Socket set (typically 10mm bolts), ratchet, jack and jack stands, and possibly a flat screwdriver for the connector.

Steps:

  1. Relieve the fuel system pressure. Open the gas cap, remove the fuel pump relay from the fuse box, and let the engine run until it stalls. Then disconnect the negative battery cable.
  2. Raise the rear of the vehicle and support it securely on jack stands.
  3. Remove the spare tire if it is blocking access to the module.
  4. Locate the FPCM on the driver's side frame rail.
  5. Disconnect the electrical connector by pressing the release tab and pulling it straight off.
  6. Remove the two mounting bolts that hold the module to the bracket.
  7. Install the new module in reverse order. Make sure the connector clicks into place securely.
  8. Reconnect the battery and test for leaks. Turn the key to the ON position for two seconds, then OFF for ten seconds, then ON again. Inspect the area for any fuel leaks.

Important note on programming: The FPCM is VIN-specific. If you buy a used module from a salvage yard, it will not work because it is programmed to the original vehicle's VIN. If you buy a new OEM module, it may also require programming with a scan tool to match your Silverado. Many aftermarket suppliers sell pre-programmed modules that are ready to plug in and play.

Why the FPCM Fails on the 2020 Silverado

The FPCM is located under the vehicle, which exposes it to harsh conditions. Here are the most common causes of failure.

Corrosion is the number one enemy. The module is constantly exposed to road salt, water, mud, and other contaminants. Over time, moisture seeps into the connector or the module housing itself, causing internal corrosion.

Electrical shorts and voltage spikes. A failing fuel pump can draw too much current and damage the FPCM. Conversely, voltage spikes in the truck's electrical system can also fry the module's electronics.

Heat exposure. The module sits near the exhaust system and can get very hot, especially during long drives or in hot climates. This heat degrades the internal electronic components over time.

How to Prevent Future FPCM Problems

You can extend the life of your new FPCM with a few simple habits.

Keep the connector clean and dry. Apply dielectric grease to the connector pins before plugging in the new module. This helps prevent moisture from entering.

Inspect the wiring harness. Look for any chafed, pinched, or damaged wires running from the module to the fuel pump. Trailer hitch wiring installations sometimes damage this harness by accident.

Do not run the tank low on fuel regularly. Running the tank below a quarter tank causes the fuel pump to run hotter and work harder, which can create an overload condition that damages the FPCM.

Address check engine lights promptly. If you see a code like P069E or U0109, do not ignore it. The longer you drive with a failing module, the more strain you put on the fuel pump and other components.

Why You Should Choose KEMSO for Your Fuel Pump Needs

When it comes to replacing your fuel pump or fuel system components, quality matters. A failing fuel pump can cause the same symptoms as a bad FPCM—hard starting, stalling, and poor performance. That is why we recommend KEMSO Fuel Pumps.

KEMSO specializes in high-performance, OEM replacement fuel pumps that are built to last. Every KEMSO fuel pump is designed to meet or exceed original equipment specifications, ensuring a perfect fit and reliable operation for your 2020 Silverado. Unlike cheap aftermarket pumps that may fail within months, KEMSO pumps are backed by a lifetime warranty—a testament to their quality and durability. Whether you need a direct replacement for your daily driver or a high-flow performance pump for your work truck, KEMSO has you covered.

KEMSO's commitment to quality means you get a plug-and-play solution that installs easily and delivers consistent fuel pressure, mile after mile. Their product line covers a wide range of vehicles, from trucks and SUVs to motorcycles and ATVs, all with the same promise of reliability.

To browse KEMSO's full selection of fuel pumps and find the right one for your Silverado, visit their website at https://www.kemsoracing.com/ . With KEMSO, you are not just buying a part—you are investing in confidence on the road.

Final thoughts: The 2020 Silverado fuel pump control module is a critical component that is easy to locate and replace. If you are experiencing fuel-related issues, start your diagnosis with the relay and connector before replacing the module. And when you need a reliable fuel pump, trust KEMSO to keep your truck running strong.

Visit KEMSO at https://www.kemsoracing.com/ for all your fuel pump needs.


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