Is Your GM Vehicle Running Rough? The ECM Might Be the Culprit.
If you’re experiencing frustrating issues like a persistent check engine light, poor fuel economy, engine stalling, or a complete no-start condition, the problem may lie with the brain of your engine: the Engine Control Module (ECM). This critical component manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the symptoms can be widespread and difficult to diagnose. This replacement ECM, part number 12633238, is the direct-fit, reliable solution to restore your vehicle’s performance and drivability.
Expert Pro Tip
Before replacing an ECM, always perform a thorough check of the vehicle’s battery, charging system, and all main power and ground connections to the module. A corroded ground wire or a weak battery can mimic the symptoms of a failed ECM, leading to an unnecessary and costly replacement. A simple voltage drop test on the power and ground circuits can save you hours of frustration.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is on with various trouble codes (DTCs).
- ✔ Engine misfires, stumbles, or runs rough.
- ✔ Vehicle stalls unexpectedly or refuses to start.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Automatic transmission shifts erratically or harshly.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Loss of power and poor acceleration.
The Plug-and-Play Solution for Your 2010-2014 Yukon ECM
Don’t waste time and money at the dealership with expensive diagnostics and programming fees. We take the guesswork out of the repair. This ECM is meticulously prepared for your specific vehicle. When you place your order, simply provide us with your vehicle’s VIN. Our technicians will then flash the module with the latest, most up-to-date OEM software directly from GM. This ensures that your new ECM communicates perfectly with all other modules in your vehicle, restoring factory performance and efficiency. It arrives at your door ready for installation, eliminating the need for specialized programming tools.
This module is a direct replacement for part numbers 12633238 and 12633055 and fits an extensive range of GM trucks, SUVs, and performance cars. While this listing focuses on the 2010-2014 Yukon ECM, it is crucial to verify that your original part number matches to ensure perfect compatibility. Installing this VIN-programmed module is a straightforward process for any competent DIYer or professional mechanic, getting you back on the road quickly and confidently.
Frequently Asked Questions
Is this ECM ready to install when I receive it?
Yes! This ECM comes pre-programmed to your vehicle’s specific VIN. In most cases, it is a direct plug-and-play installation. However, some GM vehicles may require a simple security relearn procedure, which can be done without any special tools. Instructions are readily available online for this process.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship the module without it. You can typically find your VIN on the driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
What is a security relearn procedure?
A security relearn, also known as a Passlock or anti-theft relearn, synchronizes the new ECM with your vehicle’s existing anti-theft system. It usually involves a sequence of turning the ignition key on and off for specific time intervals. It’s a simple procedure that ensures your vehicle will start and run with the new module.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty ECM, then yes, this part will resolve the issue. It’s important to have a proper diagnosis to confirm the ECM is the point of failure, as other sensors or wiring issues can cause similar symptoms.
Does this ECM fit vehicles other than the GMC Yukon?
Absolutely. This ECM fits a wide variety of GM models, including the Sierra, Silverado, Tahoe, Suburban, Escalade, Camaro, Corvette, and Express/Savana vans. Please check the detailed fitment list on this page and, most importantly, confirm that your original module’s part number is either 12633238 or 12633055.