Restore Your Truck’s Power and Reliability
Is your 2010-2012 Chevrolet Avalanche 1500 experiencing frustrating and unpredictable fuel issues? A sudden stall in traffic, a long crank time in the morning, or a check engine light that just won’t go away are classic signs of a failing Fuel System Control Module (FSCM). This isn’t just an annoyance; it’s a critical component failure that can leave you stranded. As the brain behind your fuel pump, the FSCM regulates the voltage and ensures your engine gets the precise amount of fuel it needs. When it fails, your truck’s performance and reliability suffer.
We offer a dependable and straightforward solution: a replacement FSCM, part number 20850927, that arrives at your door fully programmed to your vehicle’s specific VIN. We load the latest GM software updates, ensuring optimal performance and compatibility right out of the box. This eliminates the need for expensive dealership programming or specialized scan tools, putting the power of repair back in your hands.
A Technician’s Notebook: The Misleading Fuel Pump
I remember a 2011 Sierra 1500 that came into my shop on a tow truck. The owner was convinced his fuel pump was dead and had already spent a weekend trying to drop the tank. He had all the symptoms: crank-no-start and a P069E code. Before starting that massive job, I hooked up my scanner and checked the FSCM data. Sure enough, the module was commanding full voltage, but the pump wasn’t responding as expected. The key, however, was that the FSCM itself was unresponsive on the network intermittently (a classic U0109 code popped up during testing). We swapped this little module on the frame rail in under 15 minutes—no tank drop needed. The truck fired right up. It’s a textbook case of how this small part can mimic a much larger, more expensive failure. Always check the FSCM first!
Is Your Avalanche Showing These Symptoms?
- ✔ Engine cranks but refuses to start
- ✔ Stalling, especially under load or at idle
- ✔ Hesitation or stumbling during acceleration
- ✔ “Reduced Engine Power” message on the dash
- ✔ Check Engine Light with codes like P069E, P0230, or U0109 (Loss of Communication with FSCM)
- ✔ Inconsistent fuel pressure readings
A Straightforward Guide to Installation
Replacing the 2010-2012 Avalanche FSCM is a job most DIYers can handle with basic tools. It’s typically located on the driver-side frame rail, making it easily accessible.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the Module: Find the FSCM mounted to the inside of the driver-side frame rail, often near the spare tire.
- Disconnect Wiring: Carefully unplug the electrical connectors. Press the release tab firmly and pull the connector straight out to avoid damaging the pins or clips.
- Remove the Old Module: Unbolt the module from the frame. It’s usually held on by two small bolts.
- Install the New Module: Bolt your new, pre-programmed FSCM into place. Ensure it is securely fastened.
- Reconnect Everything: Plug the electrical connectors back into the new module until they click into place. Reconnect the negative battery terminal.
- Final Step: Cycle the key to the ‘On’ position (without starting) for 10 seconds to allow the system to initialize, then start your engine. Your repair is complete!
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 20850927, 20791901, 20827745, and 20877116, and fits a wide range of GM vehicles. Please verify your model and year below. Note that on some 2012 models, fitment depends on whether you have an integrated trailer brake controller.
Fits Select Models Including:
- Chevrolet Avalanche 1500: 2010, 2011, 2012
- Chevrolet Silverado 1500: 2010, 2011, 2012
- Chevrolet Suburban 1500: 2010, 2011, 2012
- Chevrolet Tahoe: 2010, 2011, 2012
- GMC Sierra 1500 / Denali 1500: 2010, 2011, 2012
- GMC Yukon / Yukon XL 1500: 2010, 2011, 2012
- Cadillac Escalade / ESV / EXT: 2010, 2011, 2012
- Chevrolet Colorado / GMC Canyon: 2010, 2011, 2012
- Chevrolet Express 1500 / GMC Savana 1500 Van: 2010, 2011, 2012
- Buick Enclave / LaCrosse / Regal: 2010-2012 (Varies by model)
- Cadillac CTS: 2010-2012
- GMC Acadia / Saturn Outlook / Chevy Traverse: 2010-2012
- And more. Please message us with your VIN if you are unsure about compatibility.
Frequently Asked Questions
Frequently Asked Questions
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) allows us to flash the module with the exact software calibration and updates specific to your truck’s engine, transmission, and options. This ensures perfect communication between modules and guarantees a true plug-and-play installation.
What is a Fuel System Control Module (FSCM)?
The FSCM, also known as a Fuel Pump Driver Module, is a small computer that controls the voltage sent to your electric fuel pump. Instead of the pump running at full speed all the time, the FSCM precisely adjusts its speed based on engine demand, improving efficiency and the lifespan of the pump.
Is this part difficult to replace myself?
Not at all. For most trucks like the 2010-2012 Avalanche, the FSCM is mounted on the frame rail and is very easy to access with basic hand tools. Our installation guide above walks you through the simple process, which typically takes less than 30 minutes.
Can I drive with a bad FSCM?
It is not recommended. A failing FSCM can cause your vehicle to stall unexpectedly in traffic, creating a serious safety hazard. It can also lead to a no-start condition, leaving you stranded without warning.
Will this fix my P069E check engine light code?
Yes, in the vast majority of cases. The diagnostic trouble code P069E (Fuel Pump Control Module Commanded OFF) is a direct indicator of a fault within the FSCM or its circuit. Replacing the module is the most common and effective repair for this code.
Is this a new or used part?
This is a high-quality, inspected, and tested used OEM part that has been programmed with the newest software from GM, ensuring it functions to the latest manufacturer specifications.