Restore Peak Performance to Your GM Vehicle
Is your Chevrolet Cruze, Sonic, or other GM vehicle running rough, stalling unexpectedly, or displaying a persistent Check Engine Light? 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 lead to frustrating drivability issues, poor fuel economy, and even a no-start condition. This isn’t just an inconvenience; it’s a critical component failure that compromises your vehicle’s reliability and safety.
We offer a dependable and straightforward solution. This Engine Control Module is a direct-fit replacement for a wide range of GM vehicles. More importantly, it arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We load the latest, most stable software from General Motors, ensuring all factory performance parameters and drivability improvements are in place. This eliminates the need for an expensive trip to the dealership for programming, saving you both time and money.
A Technician’s Notebook: The Phantom Misfire Case
I once had a 2014 Chevy Cruze with the 1.4L turbo in my bay that was a real head-scratcher. The owner had already replaced the spark plugs and ignition coil cassette chasing a random P0300 misfire code, but the issue persisted. The engine would stumble intermittently, especially under light load. All sensor data looked normal on the scan tool. After hours of diagnostics, I decided to check the ECM’s internal processor status. That’s when I found a pending P0606 code (ECM/PCM Processor Fault) that wasn’t triggering the main CEL. The ECM’s internal logic was failing, causing it to misinterpret data and command incorrect spark timing. Swapping in a VIN-programmed ECM like this one solved the problem instantly. It’s a reminder that sometimes the issue isn’t the components, but the computer controlling them.
Common Signs of a Failing Engine Computer
- ✔ Check Engine Light is on with communication codes (e.g., U0100) or internal processor faults (e.g., P0601, P0606).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency.
- ✔ Stalling, stumbling, or hesitation during acceleration.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Apparent loss of spark or fuel injector pulse.
- ✔ Other modules on the vehicle cannot communicate with the ECM.
Your Straightforward Installation Guide
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- ✔ Locate the ECM: On most listed models, the ECM is found in the engine bay, often near the battery or firewall. It’s a metal box with several large electrical connectors.
- ✔ Disconnect and Remove: Carefully release the locking tabs on the electrical connectors and pull them straight out. Then, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Bolt the new, pre-programmed ECM into place. Securely plug in the electrical connectors, ensuring the locking tabs click into place.
- ✔ Reconnect Power: Reconnect the negative battery terminal and tighten it securely.
- ✔ Final Steps: Start the vehicle. It may run slightly rough for the first few minutes as it completes an idle relearn procedure. Allow it to idle for 5-10 minutes before driving.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. It is guaranteed to fit the following models, but always confirm your part number before ordering:
- Buick Encore: 2013-2016 (1.4L)
- Cadillac ELR: 2014-2016 (Gasoline)
- Chevrolet Cruze: 2012-2016 (Gasoline, including 1.4L & Limited models)
- Chevrolet Express 2500/3500 Van: 2016 (4.8L, 6.0L)
- Chevrolet Silverado 2500/3500 Pickup: 2012-2016 (6.0L)
- Chevrolet Sonic: 2012-2016 (including 1.4L)
- Chevrolet Spark: 2014-2015 (Gasoline)
- Chevrolet Suburban 3500: 2016
- Chevrolet Trax: 2013-2016
- Chevrolet Volt: 2011-2015 (Gasoline)
- GMC Savana 2500/3500 Van: 2016 (4.8L, 6.0L)
- GMC Sierra 2500/3500 Pickup (including Denali): 2012-2016 (6.0L)
How does the programming process work?
It’s simple. After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. Our technicians will then use certified equipment to flash the module with the latest official GM software specific to your exact vehicle. This ensures perfect compatibility when you install it.
Do I need to do any additional programming after installation?
No. Because we program the module to your VIN before shipping, it is a plug-and-play installation. You will not need to take it to a dealer or mechanic for further programming, saving you hundreds of dollars.
Where can I find my VIN?
Your Vehicle Identification Number (VIN) is typically located on a small plate on the driver’s side of the dashboard, visible through the windshield. It’s also printed on your vehicle’s registration and insurance documents.
What if my original part number isn’t on your list?
The listed part numbers (e.g., 12668866, 12643636, 12692200) are the most common ones this module replaces. If your number is different, please contact us with your VIN and original part number. We can verify compatibility for you.
Is this difficult for a DIYer to install?
For most people with basic hand tools, this is a very manageable job. The most important parts are safely disconnecting the battery and being careful with the electrical connectors. Our step-by-step guide is designed to help you through the process.