Restore Your Truck’s Fuel Delivery and Reliability
If your 2010-2012 Chevrolet Avalanche 1500 is experiencing frustrating issues like stalling, hesitation during acceleration, a no-start condition, or an illuminated check engine light, a failing Fuel System Control Module (FSCM) is a very likely culprit. As a technician with over two decades of experience, I’ve seen these exact symptoms countless times on GM trucks. The FSCM is the brain that precisely controls the fuel pump’s voltage, ensuring your engine gets the exact amount of fuel it needs. When it fails, it can leave you stranded and scratching your head.
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 latest, most stable factory software specifically for your vehicle. All we need is your VIN. This critical step means you can skip the expensive trip to the dealership for programming. You get a part that communicates perfectly with your truck’s computer systems right out of the box, restoring performance and peace of mind. This is the same process we use in our shop to guarantee a successful repair every time.
A Technician’s Notebook: The Intermittent Stall Case
A customer brought in his ’11 Silverado with a problem that was driving him crazy: it would randomly stall at stoplights, but then start right back up. No consistent check engine light. We checked fuel pressure, which was erratic. We could have chased our tails for hours, but experience pointed to the FSCM. These modules, often mounted on the frame rail, are exposed to harsh conditions—water, salt, and vibrations—which cause internal corrosion and failure. We swapped in a pre-programmed FSCM, and the truck ran perfectly. It’s a 30-minute fix that solves a major headache.
Is Your Avalanche Showing These FSCM Failure Signs?
A faulty FSCM can mimic other fuel system problems. Here are the most common indicators I see in my diagnostic work. If you’re experiencing any of these, this module is your likely solution.
- âś” Engine cranks but will not start
- âś” Stalling, especially when coming to a stop or under load
- âś” Rough idle or engine hesitation
- âś” Reduced engine power and poor acceleration
- âś” Inconsistent fuel gauge readings
- âś” Check Engine Light with codes like P069E, P0230, or U0109 (Lost Communication with Fuel Pump Control Module)
A Straightforward Guide to Your FSCM Installation
Replacing the 2010-2012 Avalanche 1500 FSCM is a job most DIYers can handle with basic tools. Since we’ve pre-programmed it for you, there are no special computers needed.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the Module: On most Avalanche models, you’ll find the FSCM mounted to the inside of the driver’s side frame rail, near the spare tire.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, remove the bolts or nuts holding the module to the frame. It may be tight due to road grime, so a little penetrating oil can help.
- Install the New Module: Mount your new, pre-programmed FSCM in the same location and secure it with the original hardware.
- Reconnect and Finalize: Plug the electrical connectors back in until they click securely. Reconnect your battery terminal.
- Cycle the Key: Turn the key to the ‘On’ position (without starting the engine) for 10 seconds to allow the fuel system to prime. Start the engine and verify the fix.
Verified Vehicle Compatibility
This Fuel System Control Module is a direct-fit replacement for a wide range of General Motors vehicles. It is compatible with part numbers 20791901, 20827745, 20877116, and 20850927. While this listing is for the 2010-2012 Chevrolet Avalanche 1500, it also fits many other models. Please verify your part number or consult the fitment list below to ensure proper application.
Frequently Asked Questions
Why is this module pre-programmed?
Modern vehicle modules are coded to your specific vehicle’s VIN. Without programming, the part won’t communicate with the engine computer (ECM), and your truck won’t run correctly. Our service saves you a separate, costly trip to a dealership for programming.
What is an FSCM and what does it do?
The Fuel System Control Module, or FSCM, is a small computer that regulates the voltage sent to your vehicle’s electric fuel pump. This allows for precise fuel pressure control, which improves efficiency and performance compared to older, constant-pressure systems.
Is this a difficult part to replace myself?
For most individuals with basic mechanical skills, this is a very manageable job. It typically involves unplugging connectors and removing a few bolts. The most common location on GM trucks is the driver’s side frame rail, which is accessible without major disassembly.
What happens if I install a module that isn’t programmed?
If you install a non-programmed FSCM, your vehicle will likely not start. You will see a check engine light and set communication error codes. It must be programmed to your VIN to function.
Will this fix a P069E code?
Yes, the diagnostic trouble code P069E (Fuel Pump Control Module Commanded On) is one of the most common codes indicating a failed FSCM. While you should always confirm the diagnosis, a faulty module is the leading cause for this code.
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your vehicle’s 17-digit VIN. We will program the module with the latest GM software before shipping it to you.