End Frustrating Stalls and No-Start Issues in Your GM Vehicle
If your 2010-2012 GMC Yukon, Silverado, or other compatible GM vehicle is suddenly stalling, struggling to start, or showing a check engine light, a failing Fuel System Control Module (FSCM) is a very common cause. As an experienced technician, I’ve seen this part cause more headaches than almost any other electronic component on these trucks. Located on the frame rail, it’s constantly exposed to water, salt, and vibrations, leading to internal corrosion and failure. This isn’t just an inconvenience; it’s a safety issue when your engine cuts out in traffic.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine GM module and flash it with the very latest official software updates from General Motors. Before we ship it, we program it specifically to your vehicle using the VIN you provide. This means you get a part that communicates perfectly with your vehicle’s computer, restoring original performance and reliability without a trip to the dealership for expensive programming. This is the definitive fix for a faulty 2010-2012 Yukon FSCM.
A Technician’s Notebook: The Intermittent Stall Case
I remember a 2011 Sierra 1500 that came into the bay with a frustrating problem: it would randomly stall at low speeds and then refuse to restart for 10-15 minutes. The owner had already replaced the fuel pump, but the issue persisted. A scan showed a U0109 (Lost Communication with Fuel Pump Control Module) code that would come and go. Instead of throwing more parts at it, we put it on the lift and inspected the FSCM on the driver-side frame rail. A few taps on the module housing caused the engine to die immediately. The culprit wasn’t the pump, but a failing FSCM with an internal connection that was breaking under vibration. A pre-programmed module had the truck running reliably in 20 minutes, solving a problem that had plagued the owner for months.
Is Your GM Vehicle Showing These Telltale Signs?
A failing FSCM doesn’t always cause a complete breakdown. Watch for these early warning signs. Addressing them with a reliable replacement can prevent you from getting stranded.
- ✔ Engine cranks but will not start
- ✔ Sudden stalling, especially at low speeds or when coming to a stop
- ✔ Rough idling or hesitation during acceleration
- ✔ Reduced engine power and poor fuel economy
- ✔ Check Engine Light with codes like P069E, P0230, or U0109
- ✔ A buzzing or whining noise from the fuel pump area that is inconsistent
DIY Installation: Get Your Yukon Running in Under an Hour
Replacing the 2010-2012 Yukon FSCM is a straightforward job for any DIY enthusiast. Since our module arrives pre-programmed, you won’t need any special scan tools. Just basic hand tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the Module: On most trucks and SUVs like the Yukon and Silverado, you’ll find the FSCM mounted to the inside of the driver-side frame rail, typically above the spare tire.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, remove the bolts or nuts (usually 2 or 3) holding the old module to the frame.
- Install the New Module: Mount your new, pre-programmed FSCM in the same location and secure it with the original hardware.
- Reconnect: Plug the electrical connectors into the new module. You should hear a solid click.
- Final Steps: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting) for 10 seconds to allow the system to initialize, then start your engine. Your problem should be solved.
Verified Vehicle Compatibility List
This module is a direct replacement for part numbers 20791901, 20827745, 20877116, and 20850927. It fits a wide range of GM vehicles. Please verify your model and year below. Note that location may vary.
- ✔ GMC Yukon / Yukon XL 1500 (2010-2012)
- ✔ Chevrolet Tahoe / Suburban 1500 (2010-2012)
- ✔ Chevrolet Silverado 1500 / GMC Sierra 1500 (2010-2012)
- ✔ Cadillac Escalade / ESV / EXT (2010-2012)
- ✔ Chevrolet Avalanche 1500 (2010-2012)
- ✔ GMC Canyon / Chevrolet Colorado (2010-2012)
- ✔ Cadillac CTS (2010-2012)
- ✔ Buick Enclave / LaCrosse / Regal (2010-2012)
- ✔ Chevrolet Express 1500 / GMC Savana 1500 (2010-2012)
- ✔ And many other models listed in the fitment data.
Frequently Asked Questions
What exactly does a Fuel System Control Module do?
The FSCM acts as a smart controller for your fuel pump. Instead of the pump running at full speed all the time, the FSCM precisely regulates the voltage it receives based on engine demand. This improves efficiency, reduces noise, and extends the life of the fuel pump.
Is this part really plug-and-play?
Yes. Because we program the module to your specific VIN before shipping, it is 100% plug-and-play. You will not need to visit a dealer or mechanic for additional programming, saving you time and money.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it.
Will this fix a P069E or U0109 diagnostic trouble code?
In the vast majority of cases, yes. These codes directly point to a performance issue or communication failure with the FSCM. Replacing a faulty module with our pre-programmed unit is the standard, correct repair for these codes.
Where is the FSCM located on my 2011 Yukon?
On a 2011 GMC Yukon, the FSCM is mounted on the inside of the driver’s side frame rail, near the rear axle and spare tire. It’s a common location for most GM trucks and large SUVs from this era.