Restore Peak Performance to Your GM Vehicle
Is your 2010-2014 GMC Yukon, Sierra, Silverado, or other compatible GM vehicle plagued by frustrating issues like a persistent check engine light, random stalling, poor acceleration, or a no-start condition? These are classic signs of a failing Engine Control Module (ECM), the electronic brain that governs your engine’s every move. A faulty ECM can cripple your vehicle’s performance, hurt fuel economy, and lead to more significant problems if left unaddressed.
This is your direct, reliable solution. We offer a high-quality replacement Engine Control Module (part number 12633055, also replaces 12633238) that arrives at your doorstep fully programmed for your specific vehicle. Simply provide us with your Vehicle Identification Number (VIN) after your purchase, and our experts will flash the module with the latest, most up-to-date factory software from GM. This critical step ensures seamless integration, optimal engine performance, and correct transmission function, eliminating the need for an expensive trip to the dealership.
From the Diagnostic Bay
We had a 2012 Sierra 1500 in the shop with a ghost problem. It would randomly stall at stoplights, but never threw a consistent code. The owner had already replaced the fuel pump and several sensors. After chasing wiring diagrams for hours, we finally traced the issue to an intermittent internal failure in the ECM. The module would heat up during operation, causing a micro-fracture in a circuit board to open, killing the engine. Once it cooled, it would start right back up. A new, properly programmed ECM like this one solved the problem instantly. Don’t let a faulty computer run you in circles!
Symptoms of a Failing Engine Control Module
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Engine misfires, stumbles, or runs rough
- ✔ Unexplained loss of engine power and poor acceleration
- ✔ A sudden and significant drop in fuel mileage
- ✔ Vehicle refuses to start or is very difficult to start
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Communication errors when using a diagnostic scan tool
Why a VIN-Programmed Yukon ECM is Essential
In modern vehicles, the ECM is far more than a simple component; it’s a sophisticated computer tailored to your vehicle’s exact configuration. It manages critical systems like fuel injection timing, spark advance, variable valve timing, emissions controls, and transmission shift points based on data from dozens of sensors. When you install a replacement ECM, it must contain the correct software file that matches your vehicle’s VIN. This file accounts for engine size, transmission type, drivetrain (2WD/4WD), emissions standards, and other factory options. Our professional VIN programming service ensures your new Programmed Yukon ECM is a true plug-and-play solution. We take care of the complex software flashing so you can focus on the straightforward physical installation.
Simple Installation and Security Relearn
Physically replacing the ECM is a manageable task for a DIY mechanic. It typically involves disconnecting the battery, locating the module in the engine bay, unplugging the wiring harnesses, and swapping the old unit for the new one. After installation, most GM vehicles of this era require a simple security relearn procedure to sync the new ECM with the vehicle’s anti-theft system. This procedure usually does not require special tools and can be completed in about 30 minutes by following a sequence of key turns. This final step is crucial, as the vehicle will not start until the security system recognizes the new module.
Broad Compatibility Across the GM Lineup
While this is a perfect solution for the 2010-2014 GMC Yukon, part number 12633055 was used across a vast range of popular GM models. From the powerful Corvette and Camaro to workhorse trucks like the Silverado and Sierra and versatile vans like the Express and Savana, this module is a common component. Please review the comprehensive fitment list on this page and verify that your vehicle and original part number are listed to ensure compatibility. Restoring your vehicle’s brain is the first step to getting it back to factory-spec performance.
Frequently Asked Questions
Do I need to send my old ECM back?
No. There is no core charge for this part. You can keep or dispose of your old module at your convenience.
How do I provide my vehicle’s VIN?
After you complete your purchase, please send us a message containing your 17-digit Vehicle Identification Number (VIN). We must have your VIN to program the module before we can ship it.
Will this ECM fix my check engine light?
If your vehicle’s issues and diagnostic trouble codes point to a faulty ECM, then this part is the correct fix. However, it’s essential to have the vehicle properly diagnosed, as other components like sensors or wiring can also cause a check engine light.
Is the installation difficult?
The physical replacement is generally straightforward for those with basic mechanical skills. The most critical part of the process is completing the security relearn procedure after the new module is installed. Without this step, the vehicle’s anti-theft system will prevent the engine from starting.
What if I install it and the vehicle doesn’t start?
The most common reason for a no-start condition after installation is an incomplete or improperly performed security relearn procedure. Please double-check the steps for your specific vehicle model. This procedure is mandatory for the engine to run.