Is your 2010-2012 Cadillac CTS experiencing frustrating issues like stalling, long crank times, or a sudden no-start condition? Before you condemn the fuel pump, the real culprit is often the Fuel System Control Module (FSCM). As a technician with over 20 years of diagnostic experience, I’ve seen countless drivers replace expensive fuel pumps only to find the problem persists. The FSCM is the electronic brain that tells the fuel pump how much pressure to deliver. When it fails, your engine is starved of fuel, leading to poor performance and unreliability.
This isn’t just a replacement part; it’s a complete solution. We take a genuine GM FSCM (compatible with part numbers 20791901, 20827745, 20877116, and 20850927) and professionally program it to your vehicle’s specific VIN before it ships. This means you can skip the expensive trip to the dealership for programming. You get a part that’s truly plug-and-play, ready to install right out of the box. Restore your vehicle’s performance and peace of mind with a reliable, correctly calibrated module.
A Technician’s Notebook: The Ghost in the Cadillac
A few months back, a 2011 CTS was towed into my bay. The owner was frustrated; he had just paid another shop to replace the fuel pump, but the car still died intermittently and threw a P069E code (Fuel Pump Control Module Commanded On). The car would start fine, run for a bit, then sputter and stall. I connected my scan tool and monitored the fuel pressure command from the FSCM versus the actual pressure. The command was there, but the pressure would erratically drop to zero. Instead of guessing, I checked the FSCM, which on the CTS is tucked away in the left rear of the trunk. I noticed slight discoloration on the case from heat. We installed one of our pre-programmed modules, and the problem was solved instantly. The original FSCM was overheating and failing, a common issue these units face. It’s a classic case of treating the symptom (the pump) instead of the cause (the module).
Is Your Vehicle Showing These Symptoms?
A failing FSCM can mimic a bad fuel pump. If you’re experiencing any of the following, this module is likely the solution you need. Pay close attention to these common warning signs:
- âś” Engine cranks but won’t start
- âś” Stalling, especially when the engine is warm or under load
- âś” Hesitation or sputtering on acceleration
- âś” Reduced engine power and poor fuel economy
- âś” Check Engine Light with codes like P069E, P0230, P0627, or U0109 (Lost Communication with FPCM)
A Straightforward Guide to Installation
Replacing the 2010-2012 CTS Fuel Module is a job most DIYers can handle in their own garage. Because we program it for you, no special tools are required for software setup. For the Cadillac CTS, the module is located in the trunk.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Access the Module: Open the trunk. On the left-hand side (driver’s side), pull back the trunk liner or remove the access panel to expose the module. It’s a small silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old FSCM. Then, unbolt the module from its mounting bracket. Typically, there are just a couple of small bolts or nuts holding it in place.
- Install the New Module: Bolt your new, pre-programmed FSCM onto the mounting bracket. Reconnect the electrical connectors, ensuring they click securely into place.
- Final Steps: Re-install the trunk liner or access panel. Reconnect your battery terminal. Start the vehicle and let it run for a few minutes to confirm the repair is successful.
Verified Vehicle Compatibility
This module is programmed specifically for your vehicle upon purchase. It is a direct-fit replacement for a wide range of General Motors cars, trucks, and SUVs. Please verify your model and year from the list below. The location of the module will vary by vehicle.
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 / XL 1500 (10-12)
Buick: Enclave (10-12), LaCrosse (10-12), Regal (11-12)
Hummer: H3 (10)
Saturn: Outlook (10), Vue (10)
Note: This part is compatible with original part numbers 20791901, 20827745, 20877116, and 20850927. Please provide your VIN upon checkout for programming.
Frequently Asked Questions
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN (Vehicle Identification Number) allows us to program the module with the exact software and calibrations for your specific vehicle. This ensures perfect compatibility and function, eliminating the need for a dealer visit.
Is this a difficult part to install?
For most DIY enthusiasts, this is a straightforward installation. On the 2010-2012 CTS, it’s located in the trunk and is easily accessible. Since it comes pre-programmed, it’s a simple plug-and-play swap with basic hand tools.
Will this fix a P069E code?
Yes, in my experience, a faulty FSCM is the most common cause of a P069E trouble code. This module is the correct fix for that specific issue, as well as other related fuel system codes.
What if I have a different part number on my old module?
This module is a direct replacement for several part numbers, including 20791901, 20827745, 20877116, and 20850927. As long as your original part is one of these, this module will work perfectly once programmed to your VIN.
Is any other work needed after installation?
No. Because the module is pre-programmed, no further relearn procedures or software flashing are required. Simply install it, reconnect the battery, and you are ready to go.