If your 2011-2012 Buick Regal or other GM vehicle is suddenly stalling, struggling to start, or showing a check engine light, a failing Fuel System Control Module (FSCM) is a very likely culprit. This critical component acts as the brain for your fuel pump, regulating fuel pressure and delivery. When it fails, it can mimic a bad fuel pump, leading to frustrating and expensive misdiagnoses. This module, part number 20877116, is the reliable, cost-effective solution to restore your vehicle’s performance and peace of mind.
The biggest challenge with replacing an FSCM has always been the mandatory, and often costly, trip to the dealership for programming. We eliminate that step entirely. Before this module ships, we will flash it with the latest official GM software, specifically matched to your vehicle’s VIN. This means it arrives at your door ready for a true plug-and-play installation, saving you time, towing fees, and hundreds of dollars in dealer programming charges. It’s the smart fix for both savvy DIYers and professional technicians who value efficiency.
A Technician’s Notebook: The Misleading Fuel Pump
I had a 2011 GMC Sierra in the bay last month with classic ‘bad fuel pump’ symptoms: extended crank, intermittent stalling, and a P069E code stored in the computer. The customer had already replaced the in-tank fuel pump himself, but the problem persisted. Instead of just throwing another pump at it, we hooked up a scope to the FSCM output. The signal was erratic and dropping out completely under load. The original FSCM was failing internally, unable to command the new pump correctly. We installed one of our pre-programmed modules, and the truck fired right up and ran perfectly. The customer could have saved himself a full weekend of work and the cost of a fuel pump by diagnosing the FSCM first. It’s a lesson I’ve seen play out dozens of times.
Signs Your Fuel System Control Module is Failing
- ✔ Engine cranks but refuses to start.
- ✔ Vehicle stalls unexpectedly, especially under load.
- ✔ Rough idling or hesitation during acceleration.
- ✔ Reduced engine power and poor fuel economy.
- ✔ Check Engine Light illuminated with fuel-related Diagnostic Trouble Codes (DTCs) such as P069E, P0230, or U0109.
- ✔ A “Service Fuel System” message on the driver information center.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate the Module: On the 2011-2012 Regal, the FSCM is typically found in the trunk, behind the trim panel on the left-hand (driver’s side) rear quarter interior. On trucks and SUVs, it’s usually mounted on the driver’s side frame rail. Always confirm the location for your specific model.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket. Corrosion on frame-mounted units is common, so have some penetrating oil handy.
- ✔ Install the New Module: Bolt the new, pre-programmed FSCM into place. Reconnect the electrical connectors, ensuring they click securely into place.
- ✔ Final Steps: Reconnect the negative battery terminal. The vehicle is now ready to start. The module is already programmed, so no further action is required.
Will This Fit My Vehicle?
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 from the list below. After purchase, we must have your VIN to program the module correctly.
Cadillac: CTS (10-12), Escalade / ESV / EXT (10-12)
Chevrolet: Avalanche 1500 (10-12), Captiva Sport (12), Colorado (10-12), Express 1500 Van (10-12), Impala (12), Silverado 1500 (10-12), Suburban 1500 (10-12), Tahoe (10-12), Traverse (10-12)
GMC: Acadia (10-12), Canyon (10-12), Savana 1500 Van (10-12), Sierra 1500 / Denali 1500 (10-12), Yukon / Yukon XL 1500 (10-12)
Hummer: H3 (10)
Saturn: Outlook (10), Vue (10)
Note: Some models have specific options (e.g., ‘w/o integrated trailer brake control’). Please ensure your vehicle matches the description.
Frequently Asked Questions
Do I need to do any programming after I receive this module?
No. This Fuel System Control Module arrives 100% ready to install. We program it using your VIN before we ship it, so it’s a true plug-and-play solution.
What information do you need from me?
After you complete your purchase, please send us your vehicle’s 17-digit VIN (Vehicle Identification Number). We cannot ship the module until we have this information to program it correctly.
Is this part the same as a Fuel Pump Driver Module (FPDM)?
Yes, the terms Fuel System Control Module (FSCM) and Fuel Pump Driver Module (FPDM) are often used interchangeably for this component on GM vehicles. It performs the same function.
Will this fix a P069E code?
A faulty FSCM is the most common cause of a P069E trouble code. While you should always perform a complete diagnosis, replacing the FSCM is the correct repair in the vast majority of cases for this code.
Where is this module located on a 2011 Buick Regal?
On the 2011-2012 Buick Regal, the FSCM is located inside the trunk, behind the interior trim panel on the driver’s side (LH) rear quarter area.