Restore Your Truck’s Power and Reliability
There’s nothing more frustrating than a truck that won’t start, hesitates, or stalls unexpectedly. If your 2008-2009 Sierra Denali is leaving you stranded, the culprit is often not the in-tank fuel pump, but its electronic brain: the Fuel Pump Control Module (FPCM). Over my 20+ years in automotive diagnostics, I’ve seen countless owners and even other shops replace expensive fuel pumps, only to find the real issue was this critical module. This FPCM, also known as a Fuel System Control Module (FSCM), is the definitive solution to restore your vehicle’s fuel delivery system to perfect working order.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and dealer-only hassle out of the repair. Before this module ships, we program it with the latest GM software updates specifically for your truck using the VIN you provide. This ensures flawless communication with your vehicle’s computer, optimal fuel pressure management, and the elimination of persistent diagnostic trouble codes. You get a part that works correctly right out of the box, saving you from a costly trip to the dealership for programming.
Is Your Truck Showing These Telltale Signs?
A failing FPCM can mimic a bad fuel pump. Before you spend hundreds on a pump replacement, check if you’re experiencing these common symptoms of a faulty module:
- âś” Vehicle cranks but refuses to start.
- âś” Engine stalls intermittently, especially under load or when warm.
- âś” Rough idling or engine hesitation during acceleration.
- âś” Check Engine Light with codes like P069E, P0230, or U0109 (Lost Communication with Fuel Pump Control Module).
- âś” A noticeable loss of engine power and poor fuel economy.
- âś” Inconsistent fuel pressure readings on a diagnostic scanner.
Case Study: A Tricky Diagnosis
A customer brought in his ’08 Silverado with a classic no-start condition. Another shop had already replaced the in-tank fuel pump, but the problem persisted. He was frustrated and out nearly a thousand dollars. When we hooked up our scanner, we saw no communication with the FPCM (a U0109 code). Instead of just throwing another part at it, we checked the module itself, located on the driver-side frame rail. It was heavily corroded from years of exposure to road salt and moisture—a very common failure point. We installed a pre-programmed module, and the truck fired up instantly. This simple, often-overlooked part was the key, saving the customer from further misdiagnosis and expense.
A Straightforward Guide to Installation
Replacing the FPCM is a job most DIYers can handle with basic tools. It’s typically located on the driver-side frame rail, near the spare tire.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the Module: Find the FPCM mounted to the frame crossmember. It’s a small, black box with electrical connectors.
- Disconnect Electricals: Carefully unplug the electrical connectors. Use a small flathead screwdriver to release the locking tabs if necessary, but be gentle to avoid breaking them.
- Unbolt the Old Module: Remove the bolts or nuts holding the old module to the frame. These can be rusty, so applying a penetrating oil beforehand can help.
- Mount the New Module: Secure your new, pre-programmed FPCM in place using the original hardware.
- Reconnect and Finalize: Plug the electrical connectors firmly into the new module until they click. Reconnect the battery terminal. The vehicle is now ready to start with no further programming needed.
Will This Fit My Vehicle?
This module is a direct-fit replacement for a wide range of GM trucks, vans, and SUVs. It is compatible with part numbers 13501024, 15213110, 20759945, 20850907, 25785013, 25854536, 25866052, and 25967325. Please verify your vehicle is on the list below for guaranteed compatibility:
- Acadia: 2009
- Avalanche 1500: 2008-2009
- Canyon / Colorado: 2009
- Enclave: 2009
- Escalade / ESV / EXT: 2008-2009
- Express / Savana 1500 Van: 2008-2009
- Hummer H2: 2008-2009
- Hummer H3: 2009
- Outlook: 2009
- Sierra 1500 / Silverado 1500: 2007 (New Body Style), 2008-2009
- Sierra Denali: 2008-2009
- Suburban 1500: 2008-2009
- Tahoe: 2008-2009
- Traverse: 2009
- Vue: 2008-2009
- Yukon / Yukon XL 1500: 2008-2009
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, providing your VIN is essential. We use it to load the exact, most current GM software for your specific vehicle configuration. This ensures perfect compatibility and prevents performance issues.
Is any additional programming required after installation?
No. This module is a true plug-and-play solution. Because we program it to your VIN before shipping, you can simply install it and start your vehicle. No trip to the dealer is necessary.
What is the difference between an FPCM and a fuel pump?
The fuel pump is a mechanical device inside your gas tank that moves fuel. The FPCM is the electronic controller (or ‘brain’) that tells the fuel pump how fast to run based on engine demand. A bad FPCM can make a good fuel pump seem faulty.
Where is this module located on my 2008 Sierra Denali?
On most GM trucks and SUVs from this era, including the Sierra Denali, the FPCM is mounted on a frame crossmember on the driver’s side, typically above or near the spare tire.
Will this fix a P069E trouble code?
Yes, a P069E code (Fuel Pump Control Module Requested MIL Illumination) is one of the most common indicators of a failing FPCM. Replacing the module with this pre-programmed unit is the correct repair for this code.