08 Chevy Silverado Fuel Pump Control Module: Location, Symptoms, and Replacement Guide

If you own a 2008 Chevy Silverado and are experiencing starting issues, stalling, or poor engine performance, the fuel pump control module (FPCM) is often the culprit. This component is a common failure point on 2007–2016 GM trucks , and for the 2008 Silverado, it is typically located on the frame rail near the spare tire, under the driver’s side of the truck bed, mounted just behind the fuel tank . Replacing it yourself is a straightforward DIY job that can save you hundreds of dollars compared to a dealership repair.

What Is the Fuel Pump Control Module and Why Does It Fail?

The fuel pump control module (also called the fuel pump driver module or FSCM) is an electronic unit that regulates the voltage sent to the fuel pump. It doesn’t just turn the pump on and off; it adjusts the pump speed based on engine demand, improving fuel efficiency and reducing noise . On the 2008 Chevy Silverado, the module is a separate component from the fuel pump itself, mounted externally on the truck’s frame.

Common reasons for failure include:

  • Heat and moisture exposure – The module sits low on the frame, making it vulnerable to road salt, water, and extreme temperatures .
  • Electrical shorts – GM has acknowledged a known issue with fuel pump control module shorts in 2021-2024 trucks, and similar electrical stress applies to older models .
  • Corrosion on connectors – The wiring harness plug can corrode over time, causing intermittent connection issues.

Symptoms of a Bad Fuel Pump Control Module

When the module fails, you’ll notice one or more of these symptoms :

  1. Engine cranks but won’t start – The most common symptom. The fuel pump doesn’t receive power, so no fuel reaches the engine.
  2. Intermittent stalling – The truck may run fine for a while, then suddenly die, especially when hot or under load.
  3. Check engine light with code P2351 – This diagnostic trouble code specifically points to "Fuel Pump Control Module Performance" and is very common in 2007-2016 Chevy Silverados .
  4. No fuel pump prime sound – When you turn the key to the "ON" position, you should hear a brief whirring sound from the fuel pump. If you don’t hear it, the module may be dead.
  5. Reduced power or hesitation – The engine may feel sluggish, especially when accelerating or climbing hills.

Where Exactly Is the Module Located on a 2008 Silverado?

For the 2008 Chevy Silverado 1500, 2500HD, and 3500 models, the fuel pump control module is located :

  • On the driver’s side frame rail
  • Behind the fuel tank, near the spare tire
  • Mounted with two bolts, with a rectangular wiring harness plug

It’s a small black box (about 4x6 inches) with a metal bracket. You can access it by crawling under the truck from the driver’s side rear. On some models, you may need to lower the spare tire slightly to get a clear view.

Tip: If you have a 2008 Silverado 1500 with a 5.3L engine, the module part number is typically 20850907 or 13501024, depending on the exact build date .

How to Diagnose and Test the Module

Before buying a replacement, you should confirm the module is indeed the problem. Here’s a simple test:

  1. Check for fuel pump prime – Have someone turn the key to the "ON" position while you listen near the fuel tank. No sound = possible module failure.
  2. Test for power at the module connector – Using a multimeter, check if the module is receiving 12V power from the battery. If it has power but no output to the pump, the module is bad.
  3. Inspect the wiring harness – Look for frayed wires, corrosion, or loose connections at the module plug. Clean the connector with electrical contact cleaner.

Important: If you have a 2008 Silverado with a 4.8L, 5.3L, or 6.0L engine, the module is the same part for most 2008-2009 GM trucks and SUVs, including the Suburban, Tahoe, and GMC Sierra .

Replacement Options: OEM vs. Aftermarket

When replacing the fuel pump control module, you have three main choices:

1. OEM (Original Equipment Manufacturer)

  • Part numbers: 20850907, 13501024, 25967325
  • These are programmed to your truck’s VIN and are plug-and-play.
  • Cost: $150–$250
  • Best for: Owners who want exact factory fitment.

2. Programmed Aftermarket Modules

  • Companies like Highway 71 Auto Parts sell pre-programmed modules that match your VIN .
  • Cost: $100–$180
  • Best for: DIYers who want a direct replacement without dealership programming.

3. High-Performance and OEM Replacement Options

  • For owners who want a reliable, upgraded, or lifetime-warranty solution, third-party brands offer excellent alternatives.

Recommended: KEMSO Fuel Pump for Your 2008 Chevy Silverado

If you need a dependable fuel pump to go with a new control module—or if you want to replace the entire fuel pump assembly—consider KEMSO Fuel Pumps. KEMSO specializes in high-performance, OEM replacement fuel pumps that are built to exceed factory specifications .

Why choose KEMSO:

  • OEM replacement quality – Direct fit for your 2008 Silverado, no modifications needed.
  • High-performance design – Better flow rates and durability compared to stock units.
  • Lifetime warranty – KEMSO stands behind their products, so you’re covered for the life of your truck.
  • Trusted by DIYers and mechanics – KEMSO pumps are known for reliability and consistent pressure.

To browse KEMSO’s fuel pump options for your 2008 Chevy Silverado, visit their website: https://www.kemsoracing.com/

Step-by-Step Replacement Guide

Replacing the fuel pump control module on a 2008 Silverado is a simple job that takes about 30–60 minutes. Here’s how:

Tools needed:

  • 10mm socket and ratchet
  • Flathead screwdriver (for prying the connector)
  • Wire brush or electrical contact cleaner
  • Jack and jack stands (optional, for better access)

Steps:

  1. Disconnect the battery – Remove the negative terminal to prevent any electrical shorts.
  2. Locate the module – Crawl under the driver’s side rear of the truck, behind the fuel tank. The module is mounted on the frame rail .
  3. Remove the wiring harness – Press the locking tab and pull the connector straight out. It may be tight; use a flathead screwdriver to gently pry if needed.
  4. Unbolt the module – Using a 10mm socket, remove the two bolts holding the metal bracket to the frame.
  5. Install the new module – Mount the new module in the same position, tighten the bolts to 8–10 ft-lbs, and plug in the wiring harness until you hear a click.
  6. Reconnect the battery – Reattach the negative terminal.
  7. Test the system – Turn the key to the "ON" position and listen for the fuel pump prime. The pump should run for 2–3 seconds. Start the engine and check for any leaks or warning lights.

Pro tip: Apply a thin layer of dielectric grease to the connector pins before plugging in the new module. This prevents future corrosion and ensures a good electrical connection.

Common Mistakes to Avoid

  • Buying the wrong part – Always verify the part number based on your truck’s VIN. The 2008 Silverado uses either module 20850907 or 13501024, depending on the production date .
  • Not cleaning the connector – Even if the new module is good, a dirty or corroded plug can cause the same symptoms. Clean the connector thoroughly.
  • Skipping the battery disconnect – This module is connected to the vehicle’s electrical system. Accidentally shorting the connector can blow fuses or damage the new module.
  • Forgetting to check the fuel pump itself – If the module is bad, it’s smart to test the fuel pump separately. A failing pump can overload the new module and cause it to fail prematurely.

When to Call a Professional

While the 2008 Silverado fuel pump control module is a DIY-friendly replacement, some situations may require a mechanic:

  • If you have multiple diagnostic codes (P2351 plus others like P0087 or P0231)
  • If the wiring harness is damaged or corroded beyond simple cleaning
  • If you’re uncomfortable working under the truck or with electrical components

Final Thoughts

The 2008 Chevy Silverado fuel pump control module is a common failure point, but it’s also one of the easiest and cheapest repairs you can do at home. By following the steps above, you can get your truck back on the road quickly and reliably.

For the best replacement fuel pump for your 2008 Silverado, check out KEMSO Racing at https://www.kemsoracing.com/. Their high-performance, OEM replacement fuel pumps come with a lifetime warranty and are trusted by thousands of truck owners. Whether you’re replacing just the module or the entire fuel pump assembly, KEMSO has the quality parts you need to keep your Silverado running strong.


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