Get Your Vehicle Running Right Again
Is your Chevrolet, Buick, or GMC suffering from frustrating and persistent engine problems? A faulty Engine Control Module (ECM) can cause a wide range of issues, from a simple check engine light to a vehicle that won’t start at all. This module is the core of your vehicle’s performance, and when it fails, it can be a source of major stress. We eliminate that stress by providing a direct-fit, professionally programmed ECM that is ready to install right out of the box, getting you back on the road with confidence.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing ECM is the likely culprit. This professionally programmed module is the definitive solution to restore your vehicle’s factory performance and reliability.
- Erratic engine performance, stalling, or misfires
- Poor fuel economy
- Failure to pass emissions tests
- Harsh or incorrect automatic transmission shifting
- Communication error codes (U-codes)
- Specific diagnostic trouble codes (DTCs) related to sensor circuits
- Complete no-start condition with power to all other systems
By ordering our Programmed 2012-2016 Sonic ECM, you’re not just buying a part; you’re buying a simple, effective, and reliable fix that bypasses the need for an expensive trip to the dealership for programming.
Features & Benefits
- âś” VIN-Specific Programming: We flash the module with the latest GM software updates using your vehicle’s specific VIN. This ensures perfect compatibility and optimal performance, just like the original.
- âś” Plug & Play Installation: Because the programming is done before we ship, this unit is ready for installation upon arrival. No special tools or dealer visits are required for programming.
- âś” Broad Compatibility: This single unit is a direct replacement for multiple GM part numbers, including 12668866, 12668994, 12643636, 12663405, and more, covering a wide range of vehicles from the Chevy Sonic and Cruze to the GMC Sierra and Savana vans.
- âś” Cost-Effective Repair: Avoid the high labor costs and programming fees charged by dealerships. This is a straightforward, budget-friendly solution for both DIY mechanics and professional shops.
- âś” Guaranteed Protection: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
As a technician, I’ve seen countless vehicle owners buy a used ECM online, hoping for a cheap fix, only to find their vehicle still won’t start. That’s because an ECM isn’t just a part—it’s a computer that is securely married to the vehicle’s specific systems, like the ignition and anti-theft immobilizer. Without correct VIN programming, the module cannot communicate with the rest of the car. Our process ensures this critical ‘handshake’ is established before the part ever leaves our facility, which is why our modules work correctly right out of the box.
Frequently Asked Questions
What is an ECM and what does it do?
The Engine Control Module (ECM), sometimes called the Powertrain Control Module (PCM), is your vehicle’s main computer. It controls critical functions like fuel mixture, ignition timing, and transmission shifting to ensure the engine runs efficiently and smoothly.
How does the VIN programming process work?
After you place your order, you simply provide us with your vehicle’s 17-digit VIN. Our technicians use this number to access the official GM database and flash the module with the exact software and calibrations your vehicle requires. This makes the unit ready for a simple plug-and-play installation.
Do I need to do anything after installing this ECM?
In most cases, no additional programming is required. You simply install the module, and your vehicle is ready to go. On some vehicles, a simple security or crankshaft position sensor relearn procedure may be needed, which can be done with many common scan tools or by following a specific vehicle procedure.
Is this a new or used part?
This is a high-quality, inspected, and tested original equipment (OE) component that has been professionally programmed to function to factory specifications. This ensures the best fit and performance for your vehicle.
How can I be sure this fits my vehicle?
This Programmed 2012-2016 Sonic ECM fits a wide variety of GM vehicles. Please check the detailed fitment list on this page or match one of the compatible part numbers (like 12670335, 12668866, etc.). Providing your VIN during checkout is the best way to guarantee a perfect match.
What does the warranty cover?
This unit is backed by our one-year replacement warranty. In the unlikely event of a part failure within one year of purchase, we will provide a replacement unit.