Restore Peak Performance to Your GM Vehicle
Is your 2011 Buick Regal or other GM vehicle suffering from frustrating, hard-to-diagnose issues like a persistent Check Engine Light, rough idling, stalling, or a sudden drop in fuel economy? These are classic signs of a failing Engine Control Module (ECM), the critical computer that acts as your engine’s brain. A faulty ECM can disrupt everything from fuel injection and ignition timing to transmission shifting, making your vehicle unreliable and inefficient. Don’t let a bad module keep you off the road. This direct-fit 2011 Regal Engine Control Module is the definitive solution to restore your vehicle’s original performance and dependability.
With over two decades of hands-on diagnostic experience, I’ve seen firsthand how a failing ECM can cause chaos. Drivers often spend hundreds of dollars chasing phantom issues like bad sensors or fuel pumps, only to find the root cause was the computer all along. This module eliminates the guesswork. We take the hassle out of the repair by pre-programming this unit specifically for your vehicle using your VIN. This means it arrives at your door with the latest GM software updates already installed, ready for a straightforward installation without requiring a trip to the dealership for expensive programming.
From the Diagnostic Bay: The Intermittent Stall Case
I remember a 2011 LaCrosse that came into my shop with a maddening intermittent stalling problem. The owner had already replaced the fuel pump and a camshaft sensor at another garage, but the issue persisted. No specific codes were stored, just a generic U0100 ‘Lost Communication with ECM’ that would appear and disappear. After checking the wiring harness for integrity, we focused on the ECM itself. By monitoring live data, we noticed the module’s internal temperature readings would spike just before it would shut down communication and stall the engine. It was a classic case of internal circuit failure under heat. We replaced it with a VIN-programmed module just like this one, and the car has run flawlessly ever since. This story highlights why addressing the ECM directly is often the most effective and economical fix.
Common Signs of a Failing ECM
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ Your engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency (MPG).
- ✔ The engine hesitates, stumbles, or stalls unexpectedly.
- ✔ Rough or erratic automatic transmission shifting.
- ✔ Loss of power and poor acceleration.
- ✔ Communication errors with diagnostic scan tools.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the ECM: On most compatible models like the 2011 Regal, the ECM is found in the engine compartment, typically on the driver’s side (LH side) mounted to a bracket.
- ✔ Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Do not force them.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you may need to reuse it.
- ✔ Install the New Module: Bolt your new, pre-programmed ECM securely onto the mounting bracket.
- ✔ Reconnect Everything: Plug the wiring harnesses back into the new ECM until they click firmly into place. Reconnect the negative battery terminal.
- ✔ Final Step: In many cases, you are done! However, some GM vehicles may require a simple security relearn procedure (often called a ‘key cycle’) to sync the new ECM with your vehicle’s anti-theft system. This procedure can typically be done without special tools and instructions are widely available online or in your owner’s manual.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12616889, 12630908, 12637106, 12642665, 12650256, and 12651993, ensuring broad compatibility. It fits the following vehicles:
- Buick Allure: 2010 (2.4L, 3.0L)
- Buick LaCrosse: 2010-2011 (2.4L), 2010 (3.0L)
- Buick Regal: 2011
- Cadillac CTS: 2010-2012 (3.0L), 2012 (3.6L)
- Cadillac SRX: 2010-2011 (3.0L)
- Chevrolet Camaro: 2012 (3.6L)
- Chevrolet Captiva Sport: 2012
- Chevrolet Equinox: 2010-2011
- Chevrolet Impala: 2012
- Chevrolet Orlando: 2012-2013
- GMC Terrain: 2010-2011
- Saab 9-5: 2010-2011 (2.0L)
Important: After purchase, please send us your vehicle’s 17-digit VIN to ensure we program the module with the correct software for your specific configuration.
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming involves loading your vehicle’s specific software onto the ECM. This software controls engine and transmission parameters unique to your car’s options, like engine size and emissions equipment. Our service ensures the module is a true plug-and-play solution, saving you from a costly trip to the dealer.
How do I send you my VIN?
After you complete your purchase, simply reply to your order confirmation email with your 17-digit Vehicle Identification Number (VIN), or send it to us through the platform’s messaging system. We cannot ship your part until we receive this information.
Will I need any special tools for installation?
No special tools are required for the physical installation, which typically just involves basic hand tools like a socket set. While most vehicles are ready to go after installation, some may require a simple key-cycle security relearn procedure, which does not require any tools.
Is this part a guaranteed fix for my car’s problems?
This ECM is a direct solution for issues caused by a faulty module. If your vehicle exhibits the symptoms listed (no-start, poor MPG, specific codes), this is a very likely fix. However, always ensure a proper diagnosis has been performed, as other components can sometimes cause similar symptoms.
Does this module replace other part numbers?
Yes, this module is a fully compatible replacement for several GM part numbers, including 12616889, 12630908, 12637106, 12642665, and 12650256, in addition to 12651993.