Is Your Cadillac CTS Stalling or Refusing to Start?
As a technician with over two decades of experience, one of the most common issues I see with 2010-2012 GM vehicles, including the Cadillac CTS, is a sudden no-start or stalling while driving. The check engine light comes on, and you’re left stranded. Often, the blame immediately goes to the fuel pump, but after a costly replacement, the problem persists. The real culprit is frequently the Fuel System Control Module (FSCM), the electronic brain that commands the fuel pump.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine GM module and program it with the latest GM software specifically to your vehicle’s VIN. This means you get a part that communicates perfectly with your car’s computer systems, restoring factory performance and reliability without a trip to the dealership for expensive programming.
The Technician’s Perspective: Why VIN Programming is Crucial
A customer’s 2011 CTS came into my shop last week with these exact symptoms: intermittent stalling and a P069E trouble code stored in the computer. They had already replaced the in-tank fuel pump, but the issue didn’t go away. The problem was a faulty FSCM. On these vehicles, the module is the weak link, often failing due to heat cycles and electronic fatigue. Simply installing a used module from another car won’t work because it’s not calibrated for your specific vehicle’s operating parameters. Our VIN programming service eliminates that guesswork and ensures a permanent fix.
Symptoms of a Failing 2010-2012 CTS Fuel Module
If you’re experiencing any of the following, a failing FSCM is the likely cause. Replacing it can restore your vehicle’s performance and prevent you from being stranded.
- โ Engine cranks but will not start
- โ Vehicle stalls unexpectedly while driving
- โ Reduced engine power or hesitation during acceleration
- โ Check Engine Light with codes like P069E, P0230, or U0109
- โ Inconsistent fuel gauge readings
Expert Pro Tip: Check Your Connections
Before installing your new module, take a moment to inspect the electrical connector harness. On the CTS, the module is located in the left-hand rear compartment, where moisture can sometimes accumulate. Look for any signs of green or white corrosion on the pins. Cleaning the connector with a dedicated contact cleaner and a small brush ensures a perfect connection and prevents premature failure of your new part. I’ve seen brand new modules damaged by a corroded harness.
Plug-and-Play Installation: No Dealer Visit Required
This module is designed for a straightforward DIY installation. Because we program it to your VIN before shipping, you can skip the dealer and get your car back on the road in under an hour.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the Module: On the 2010-2012 Cadillac CTS, the FSCM is located in the trunk, behind the trim panel on the driver’s side (LH rear compartment).
- Disconnect and Remove: Carefully unplug the electrical connector(s) from the old module. Then, remove the bolts or nuts securing it to the vehicle body.
- Install the New Module: Mount your new, pre-programmed FSCM in the same location and tighten the fasteners.
- Reconnect: Plug the electrical connector(s) firmly into the new module. You should hear a click.
- Final Step: Reconnect the negative battery terminal. Start the vehicle to confirm the repair is complete.
Guaranteed Compatibility
This module is a direct replacement for part numbers 20827745, 20791901, 20877116, and 20850927. It fits a wide range of GM vehicles beyond the CTS, including the Escalade, Silverado, Tahoe, Acadia, and more. Simply provide your VIN at checkout, and we’ll handle the rest, ensuring you receive a part that works perfectly right out of the box.