Restore Your Cadillac’s Performance and Reliability
Is your 2010-2012 Cadillac CTS experiencing frustrating issues like extended cranking times, sudden stalling, or a check engine light that just won’t go away? Before you condemn the fuel pump, the real culprit is often the Fuel System Control Module (FSCM). This critical component regulates the voltage sent to your fuel pump, and when it fails, it can cause a cascade of problems that can leave you stranded. This isn’t just an inconvenience; it’s a matter of reliability and safety.
We offer a dependable and straightforward solution: a genuine GM Fuel System Control Module, part number 20827745. The best part? It arrives at your door completely programmed to your vehicle’s specific VIN. This means you can skip the expensive trip to the dealership for programming. This is the smart, efficient fix for both professional mechanics and DIY enthusiasts looking to restore their vehicle’s proper function and peace of mind.
A Technician’s Notebook: The Intermittent Stall
A 2011 CTS came into my shop with a complaint that baffled the owner: it would run perfectly for days, then suddenly stall at a stoplight and refuse to restart for 10-15 minutes. There were no consistent codes, just a history U0109 (Lost Communication With Fuel Pump Control Module). Many would jump to replace the fuel pump, but experience pointed me elsewhere. I monitored the command and actual voltage to the pump with my scan tool. During a test drive, I saw the FSCM command 12 volts, but the pump was only receiving 5-6 volts just before it stalled. The module was overheating and failing internally. Replacing the 2010-2012 CTS FSCM with a pre-programmed unit solved the problem permanently. It’s a classic case where diagnosing the controller, not just the component it controls, saves time and money.
Is Your Cadillac Exhibiting These Telltale Signs?
A failing FSCM can manifest in several ways. If you’re noticing any of the following, this module is the likely solution.
- âś” Engine cranks but won’t start
- âś” Stalling, especially when coming to a stop or under load
- âś” Hesitation or sputtering during acceleration
- âś” Reduced Engine Power message on the dash
- âś” An active Check Engine Light with DTCs P069E, P0230, or U0109
A Straightforward Guide to Installation
Installing your new 2010-2012 CTS FSCM is a manageable job for a confident DIYer. On the Cadillac CTS, the module is located in the left-hand (driver’s side) rear compartment of the trunk.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Access the Module: Open the trunk and remove the floor covering and the left-side trim panel to expose the module.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old FSCM. Then, unbolt the module from its mounting bracket. Typically, there are two small bolts or nuts holding it in place.
- Install the New Module: Bolt the new, pre-programmed FSCM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Reassemble: Reinstall the trunk trim panels and floor covering.
- Final Step: Reconnect the negative battery terminal. Start the vehicle to confirm the repair. The engine should start promptly and run smoothly.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 20827745, 20791901, 20877116, and 20850927. While this listing is focused on the 2010-2012 Cadillac CTS, this FSCM fits a very wide range of GM vehicles. Please verify your part number or use the fitment chart to ensure it is correct for your specific model and year, as mounting locations vary. Key models include:
- âś” Cadillac CTS (2010-2012) – LH rear compartment
- âś” Chevrolet Silverado & GMC Sierra 1500 (Various Years) – LH frame rail
- âś” Chevrolet Tahoe/Suburban & GMC Yukon/Yukon XL (Various Years) – LH frame rail
- âś” Cadillac Escalade / ESV / EXT (Various Years) – LH frame rail
- âś” Chevrolet Colorado & GMC Canyon (2010-2012) – Rear center frame
- âś” Buick Enclave, GMC Acadia, Chevrolet Traverse (2010-2012) – Rear crossmember
- âś” …and many other GM cars, trucks, and SUVs.
Frequently Asked Questions
Frequently Asked Questions
What does a Fuel System Control Module (FSCM) do?
The FSCM, also known as a fuel pump driver module, acts as a smart relay. It receives commands from the Engine Control Module (ECM) and precisely controls the voltage and speed of the fuel pump to deliver the exact amount of fuel the engine needs.
Why do you need my VIN to program the module?
Every GM vehicle has specific software and calibrations. We use your Vehicle Identification Number (VIN) to load the exact, latest GM-approved software for your car’s engine, transmission, and options. This ensures perfect communication and performance, just like the factory intended.
Is this part truly plug-and-play?
Yes! Because we program it to your VIN before shipping, you can install it yourself without needing a trip to the dealer or a high-end scan tool for programming. It’s ready to go right out of the box.
What happens if I install an unprogrammed module?
An unprogrammed module will not have the correct software to communicate with your vehicle’s other computers. In most cases, the vehicle will not start at all, and you will still need to have it towed to a facility for programming.
Where is the FSCM located on a 2011 Cadillac CTS?
On the 2010-2012 Cadillac CTS, the module is conveniently located inside the trunk. You’ll find it behind the trim panel on the left-hand (driver’s) side.
Will this fix a P069E code?
Yes, Diagnostic Trouble Code P069E (Fuel Pump Control Module Requested MIL Illumination) is one of the most common codes indicating a faulty FSCM. Replacing the module is the standard, accepted repair for this code.