Restore Peak Performance to Your GM Truck or SUV
Is your 2014-2016 Sierra 1500, Silverado, or other compatible GM vehicle suffering from frustrating and persistent issues? An illuminated Check Engine Light, rough idling, poor fuel economy, or even a no-start condition can often be traced back to a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifts. When it fails, the entire system’s performance and reliability are compromised. This VIN-programmed Engine Control Module is the definitive solution to restore your vehicle’s factory performance and get you back on the road with confidence.
From the Diagnostic Bay
We had a 2015 Silverado 1500 come into the shop with a complaint of intermittent stalling and a check engine light that multiple other shops couldn’t solve. The owner had already spent a fortune replacing the throttle body, MAF sensor, and all eight spark plugs. After running a full diagnostic, we noticed erratic data coming from the ECM. The internal processors were failing under load, causing incorrect commands to be sent. We installed one of our VIN-programmed ECMs, performed the quick security relearn, and the truck ran perfectly. It’s a classic case of treating the symptoms instead of the cause – sometimes, you have to go straight to the brain.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns immediately.
- ✔ Unexplained drop in fuel mileage.
- ✔ Engine misfires, stumbling, or rough idling.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Hesitation or stalling during acceleration.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
The Superior Solution: A VIN-Programmed 2014-2016 Sierra 1500 Engine Control Module
Don’t settle for a generic, unprogrammed module that requires an expensive trip to the dealership for flashing and setup. Our process is designed for a seamless, hassle-free installation. When you purchase this module, you provide us with your vehicle’s 17-digit VIN. Our certified technicians then use official GM equipment to flash the unit with the latest, most stable software specific to your exact vehicle build. This ensures perfect compatibility with your engine, transmission, and all factory options. It’s a true plug-and-play solution that saves you time, money, and the headache of dealer programming appointments.
Wide-Ranging GM Compatibility
While this is a perfect fit for the 2014-2016 Sierra 1500, this module (part number 12663391) is also a direct replacement for a wide array of GM vehicles and supersedes multiple older part numbers. This module is compatible with part numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12672963, and 12669318. It fits models such as:
- 2014-2016 Chevrolet Silverado 1500
- 2015-2016 Chevrolet Tahoe, Suburban 1500
- 2015-2016 GMC Yukon, Yukon XL 1500
- 2015-2016 Cadillac Escalade, Escalade ESV
- 2014-2016 Cadillac CTS, ATS, XTS (specific engines)
- 2014-2016 Chevrolet Corvette
- 2016 Chevrolet Camaro (6.2L)
- 2015-2016 Chevrolet Colorado / GMC Canyon (3.6L)
Please verify your original part number or consult the detailed fitment list to ensure perfect compatibility with your specific model and options.
Frequently Asked Questions
Do I need to get this ECM programmed by a dealer?
No. The main benefit of our service is that we program the module for you before it ships. Simply provide your vehicle’s VIN during or after checkout, and our technicians will flash it with the correct GM factory software for your specific vehicle. This saves you hundreds in dealership programming fees.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your vehicle. It contains critical information about the make, model, year, engine, transmission, and other factory-installed options. We use the VIN to load the precise software and calibrations your vehicle requires for proper operation.
Is this a difficult part to install?
The physical installation is straightforward for a DIY-er with basic tools. The ECM is typically located in the engine bay. After installation, you may need to perform a simple security relearn procedure (often called a ‘key relearn’ or ‘anti-theft relearn’), which can usually be done without special tools. Instructions are widely available online for this process.
Will this fix my check engine light?
If the check engine light and other symptoms are caused by a faulty ECM, then yes, this part will resolve those issues. However, it is crucial to have your vehicle properly diagnosed to confirm the ECM is the point of failure. This module will not fix problems related to other faulty sensors or mechanical components.
Which part numbers does this module replace?
This ECM, part number 12663391, is a direct replacement and is compatible with the following GM part numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12672963, and 12669318.