Restore Your Truck’s Performance and Reliability
Is your 2011-2012 Sierra Denali 1500 experiencing frustrating and potentially dangerous issues like sudden stalling, a crank-no-start condition, or a persistent ‘Service Fuel System’ message on the dash? These are classic signs of a failing Fuel System Control Module (FSCM). As the electronic brain for your fuel pump, the FSCM is critical for delivering the precise amount of fuel your engine needs. When it falters, it can leave you stranded. This isn’t just an inconvenience; it’s a critical component for your truck’s operation.
Forget the expensive trip to the dealership and their hefty programming fees. We offer a direct, reliable solution. This Fuel System Control Module, compatible with part number 20850927, arrives at your door pre-programmed with the latest official GM software, tailored specifically to your truck’s Vehicle Identification Number (VIN). This ensures seamless communication with your vehicle’s other computers and restores factory performance right out of the box. It’s the smart, efficient fix for both professional mechanics and dedicated DIYers.
A Technician’s Notebook: The Intermittent Stall Case
I had a 2011 Silverado in the bay last month with a problem that was driving the owner crazy. It would run perfectly for days, then suddenly stall at a stoplight. No warning, no sputtering, just dead. He’d already replaced the fuel pump, but the problem persisted. The only code stored was a U0109 – ‘Lost Communication with Fuel Pump Control Module.’ On my scan tool, I watched the commanded fuel pressure vs. the actual pressure. Most of the time, they matched. But then, I saw the FSCM command drop to zero for a split second, and the engine would die. The module was simply giving up. We installed one of these VIN-programmed modules, and the truck has been running flawlessly since. It’s a common failure point, and this is the definitive fix.
Common Signs of a Failing FSCM
- ✔ Engine cranks but will not start
- ✔ Vehicle stalls unexpectedly while driving or at idle
- ✔ Reduced engine power and poor acceleration
- ✔ ‘Service Fuel System’ warning light is illuminated
- ✔ Check Engine Light with Diagnostic Trouble Codes (DTCs) like P069E, P0230, or U0109
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery.
- ✔ Locate the Module: On most GM trucks like the Sierra and Silverado, the FSCM is mounted on the driver’s side frame rail, near the spare tire.
- ✔ Disconnect: Carefully unplug the electrical connectors from the old module. Press the release tabs firmly to avoid breaking them.
- ✔ Remove Old Module: Use a socket wrench to remove the bolts or nuts securing the old FSCM to its bracket or the frame.
- ✔ Install New Module: Mount the new, pre-programmed FSCM in the same location and secure it with the original hardware.
- ✔ Reconnect and Finalize: Plug the electrical connectors into the new module until they click securely into place. Reconnect the battery terminal. The vehicle is now ready to start with no further programming required.
Will This Fit My Vehicle?
This module is a direct-fit replacement for a wide range of General Motors vehicles. Please verify your part number or match your vehicle, year, and model from the list below. This part is a direct replacement for part numbers 20791901, 20827745, 20877116, and 20850927.
Fits Select Models Including:
- GMC Sierra / Chevrolet Silverado 1500 (2010-2012)
- GMC Yukon / Chevrolet Tahoe / Chevrolet Suburban (2010-2012)
- Cadillac Escalade / ESV / EXT (2010-2012)
- Chevrolet Avalanche 1500 (2010-2012)
- GMC Canyon / Chevrolet Colorado (2010-2012)
- Buick Enclave / LaCrosse / Regal (2010-2012)
- Cadillac CTS (2010-2012)
- And many more. Please refer to the full fitment data to confirm compatibility.
Frequently Asked Questions
Why do you need my VIN?
Your vehicle’s VIN is required to load the correct, vehicle-specific software from GM. This ensures the module works perfectly with your truck’s engine, fuel system, and other electronics, eliminating the need for any additional programming.
Is this a plug-and-play part?
Yes! Because we program it to your VIN before shipping, it is a true plug-and-play installation. Simply bolt it on, plug in the connectors, and you’re ready to go.
Will this fix a check engine light with code P069E?
In many cases, yes. DTC P069E is specifically related to a fault detected by the Fuel System Control Module. If the module itself is the source of the fault, replacing it with this pre-programmed unit is the correct repair.
My old module has a different part number. Will this still work?
This module replaces several part numbers, including 20791901, 20827745, and 20877116. As long as your original part is one of these compatible numbers, this module will work as a direct replacement.
Where is the FSCM located on my 2011 Sierra?
On most 2010-2012 GM trucks, including the Sierra, the Fuel System Control Module is located on the outside of the driver-side frame rail, typically above the spare tire area.