Restore Your Vehicle’s Performance and Reliability
Is your Buick Encore, Chevy Cruze, Sonic, or other GM vehicle suffering from frustrating issues like a persistent Check Engine Light, poor fuel economy, stalling, or rough running? These are classic signs of a failing Engine Control Module (ECM), the computer that acts as the brain of your engine. A faulty ECM can disrupt everything from fuel injection to ignition timing, making your vehicle unreliable and stressful to drive. Don’t let a bad module keep you off the road. This Engine Control Module is the dependable, straightforward solution you need.
We take the guesswork and high cost out of the repair. Unlike a blank module from a dealer that requires expensive specialty tools and a trip to the service bay, this ECM arrives at your door pre-programmed with the latest official GM software. All we need is your vehicle’s VIN at checkout. We handle the complex programming, so you receive a component that is truly plug-and-play, ready to restore your engine’s proper function and efficiency right out of the box.
Is Your GM Vehicle Exhibiting These ECM Failure Signs?
- ✔ Persistent Check Engine Light (CEL) that won’t go away.
- ✔ Stalling, hesitation, or stumbling during acceleration.
- ✔ Noticeable decrease in fuel mileage.
- ✔ Engine misfires or runs rough at idle.
- ✔ The vehicle fails to start intermittently or cranks but won’t turn over.
- ✔ Transmission shifting problems or harsh shifts.
- ✔ Error codes stored in the system, such as P0601 (Internal Control Module Memory Check Sum Error), P0606 (ECM/PCM Processor Fault), or U0100 (Lost Communication With ECM/PCM).
A Technician’s Notebook: The Intermittent Stall
I once had a 2014 Chevy Sonic in my bay that was driving the owner crazy. It would stall randomly at red lights, but never consistently enough to diagnose easily. There were no hard fault codes, just a history of lost communication. After checking all the usual suspects—fuel pressure, wiring harnesses, sensors—we focused on the ECM. On the surface, it seemed fine. But intermittent internal faults, often caused by heat cycles and vibration over thousands of miles, can create these ghost-like problems. We installed a VIN-programmed 2013-2016 Encore Engine Control Module (the same family of ECMs) and the problem vanished instantly. The latest software corrected logic flaws the original module had, providing a permanent fix and a very relieved customer.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow capacitors to discharge.
- ✔ Locate the ECM: On most compatible vehicles like the Encore or Cruze, the ECM is found in the engine bay, often mounted to the firewall or an inner fender. Refer to your vehicle’s service manual for the exact location.
- ✔ Disconnect Connectors: Carefully release the locking tabs on the electrical harness connectors and pull them straight out from the module. Avoid pulling on the wires themselves.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket. There are typically a few 10mm bolts holding it in place.
- ✔ Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the bolts. Reconnect the electrical connectors, ensuring they click securely into place.
- ✔ Reconnect Battery: Reattach the negative battery terminal. Your vehicle is now ready to start. In some cases, a security or crank relearn procedure may be required, which can often be done without special tools.
Will This Fit My Vehicle?
This module is a direct replacement for a wide range of General Motors vehicles and is compatible with part numbers 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. It is guaranteed to fit the following models and options:
- Buick Encore: 2013-2016 (1.4L)
- Buick ELR: 2014-2016
- Chevrolet Cruze: 2012-2016 (Gasoline models, check specific IDs)
- Chevrolet Sonic: 2012-2016
- Chevrolet Spark: 2014-2015 (Gasoline)
- Chevrolet Trax: 2013-2016
- Chevrolet Volt: 2011-2015
- Chevy Express / GMC Savana Van (2500/3500): 2016 (4.8L, 6.0L)
- Chevy Silverado / GMC Sierra (2500/3500): 2012-2016 (6.0L)
- And more… Please verify your part number or contact us with your VIN to confirm compatibility.
Frequently Asked Questions
How does the VIN programming work?
After you complete your purchase, simply send us your 17-digit Vehicle Identification Number (VIN). Our technicians will use it to load the latest, most stable GM-approved software specific to your vehicle’s configuration. This ensures perfect compatibility and function, eliminating the need for a trip to the dealer.
Is this a simple plug-and-play installation?
Yes, for the vast majority of vehicles. Because the module arrives pre-programmed to your VIN, it is designed to be a direct-fit replacement. You simply disconnect the old module and connect this new one. Some vehicles may require a simple key relearn or crankshaft position sensor relearn procedure, which can typically be done without special tools.
Will this fix my ‘Check Engine’ light?
If the Check Engine Light is caused by a failing ECM (common codes include P0601, P0606), then yes, this part will resolve the issue. We always recommend having a professional mechanic properly diagnose the vehicle to ensure the ECM is the root cause before ordering.
What is the difference between an ECM and a PCM?
ECM stands for Engine Control Module, while PCM stands for Powertrain Control Module. In many modern vehicles, these terms are used interchangeably. A PCM controls both the engine and the transmission, while an ECM may only control the engine. This module functions as the primary engine computer for the vehicles listed.
Do I need to send my old module (core) back?
No core charge is required for this part. You can keep or responsibly dispose of your old module without needing to return it to us.