Restore Your Vehicle’s Brain and Drivability
Is your 2011 Buick Regal or other GM vehicle acting up? Intermittent stalling, a persistent Check Engine Light, or strange transmission behavior can be incredibly frustrating. Often, the root cause isn’t a mechanical failure but a problem with the Engine Control Module (ECM)—the computer that manages everything from fuel injection to spark timing. When the ECM fails, it can feel like your car has lost its mind. This is the reliable, straightforward solution you’ve been looking for.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine OEM ECM and program it with the latest GM-certified software specifically for your vehicle’s VIN. This means you get a component that’s not only guaranteed to be compatible but also has all the performance and efficiency improvements released by the manufacturer since your car was new. Forget about expensive trips to the dealership for programming—this module arrives at your door ready for a plug-and-play installation.
From the Diagnostic Bay: The Intermittent Stall Mystery
I had a 2011 Buick Regal in my shop that was a real head-scratcher. The owner complained of random stalling at stoplights and an occasional no-start condition, but with no consistent Check Engine Light codes. We checked the fuel pump, sensors, and wiring, but everything seemed fine. On a hunch, I monitored the live data stream from the ECM and noticed the 5-volt reference signal would occasionally drop out for a split second—just long enough to cause a stall but not always long enough to set a fault code. This internal ECM failure is a classic symptom I’ve seen on dozens of these platforms. Instead of a costly diagnostic rabbit hole, we ordered a VIN-programmed ECM like this one. The swap took less than 30 minutes, and the car ran perfectly immediately. It’s a prime example of how the right part, correctly prepared, can save hours of labor and frustration.
Common Signs of a Failing GM ECM
- ✔ Check Engine Light is illuminated with codes like P0601, P0606 (Internal Control Module Processor Error), or U0100 (Lost Communication with ECM).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel economy.
- ✔ Rough idling, engine misfires, or stalling.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Apparent loss of engine power and throttle response.
- ✔ Other warning lights (like traction control) may illuminate as other modules lose communication with the ECM.
Your Straightforward ECM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait about 10 minutes to ensure all systems are powered down.
- ✔ Locate the ECM: On a 2011 Buick Regal, the ECM is typically found in the left-hand (driver’s side) of the engine compartment. Its location can vary on other models, so consult your owner’s manual if needed.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Bolt your new, pre-programmed ECM into place. Securely plug in the electrical connectors, making sure they click to confirm they are fully seated.
- ✔ Reconnect and Start: Reconnect the negative battery terminal. The vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes before starting the engine. Your vehicle is now ready to drive!
Verified Fitment Across Multiple GM Models
This ECM is a direct-fit replacement for a wide range of General Motors vehicles. While this is a perfect 2011 Regal Engine Control Module, it also fits many others. Please match your original part number to one of the following: 12616889, 12630908, 12637106, 12642665, 12650256, or 12651993. Key compatible models include:
- Buick Allure (2010)
- Buick LaCrosse (2010-2011)
- Cadillac CTS (2010-2012)
- Cadillac SRX (2010-2011)
- Chevrolet Camaro (2012)
- Chevrolet Captiva Sport (2012)
- Chevrolet Equinox (2010-2011)
- Chevrolet Impala (2012)
- Chevrolet Orlando (2012-2013)
- GMC Terrain (2010-2011)
- Saab 9-5 (2010-2011)
Note: This is not an exhaustive list. Always verify fitment by part number or by contacting us with your VIN.
Frequently Asked Questions
What does ‘VIN-Programmed’ mean?
It means we load the module with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM-approved software. This ensures it communicates perfectly with your car’s other systems, like the transmission, anti-lock brakes, and security system, right out of the box.
Do I need to take my car to a dealer after installation?
No. Because we program the module before shipping, you do not need to visit a dealer or mechanic for additional programming. The only potential step is a simple security relearn, which you can do yourself in your driveway.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit VIN. We cannot ship your part until we receive this information, as it’s essential for the programming process.
Will this fix my car’s specific problem?
This part corrects issues directly caused by a faulty ECM. While the symptoms listed are very common for ECM failure, we always recommend a proper diagnosis by a qualified mechanic to confirm the ECM is the source of the problem before ordering.
Is this the correct part for my vehicle?
This module replaces several part numbers, including 12642665. The best way to ensure compatibility is to match the part number from your original ECM to one of the numbers listed in our description. If you’re unsure, we’re here to help!