Is Your Yukon XL 2500 Running Rough?
If your 2009 or 2010 GMC Yukon XL 2500 is experiencing frustrating issues like a persistent check engine light, stalling, poor fuel mileage, or a complete no-start condition, a failing Engine Control Module (ECM) is often the culprit. The ECM is the brain of your vehicle’s engine, managing everything from fuel injection and spark timing to transmission shifting and emissions control. When it fails, it can cause a cascade of problems that leave your powerful truck feeling unreliable and weak.
Don’t let a faulty computer keep you off the road. This replacement Engine Control Module, part number 12625455, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency. We take the guesswork and hassle out of the repair by pre-programming the unit specifically for your vehicle before it ever leaves our facility.
Expert Pro Tip: Before disconnecting your old ECM, be sure to disconnect the vehicle’s battery. This prevents any potential for electrical shorts or voltage spikes that could damage the new module or other sensitive electronics during installation. Wait at least 15 minutes after disconnecting the battery for all systems to fully discharge.
Your Direct Solution for the 2009-2010 Yukon XL 2500 ECM
This isn’t just a generic part off a shelf. We provide a complete, ready-to-install solution. When you place your order, you will provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then use this VIN to flash the ECM with the latest, most up-to-date factory software directly from GM. This ensures perfect compatibility with your truck’s specific engine, transmission, and factory options. This process eliminates the need for an expensive trip to the dealership for programming, saving you time and money.
This module is a direct replacement for original part numbers 12625455 and 12629009, ensuring a perfect physical fit and seamless electronic integration. While the installation is straightforward for a DIY mechanic, some vehicles may require a simple security relearn procedure (often called a CASE relearn or anti-theft relearn) after installation. This procedure can typically be done in your driveway without special tools and syncs the new ECM with your vehicle’s anti-theft system.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Rough idling or engine misfires.
- ✔ A complete no-start condition where the engine cranks but won’t fire.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
Broad GM Compatibility
While this is the perfect solution for your 2009-2010 Yukon XL 2500, this versatile ECM was also used across a wide range of GM vehicles. It is compatible with models like the Chevrolet Silverado 2500/3500, Suburban, Tahoe, Express Van, and Cadillac Escalade, among many others listed in the fitment guide. This speaks to the reliability and proven design of the hardware. By purchasing from us, you get a quality part programmed precisely for YOUR vehicle’s needs.
Frequently Asked Questions
Do I need to program this ECM?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the correct GM factory software for your specific vehicle.
What is a VIN and where do I find it?
The VIN is your Vehicle Identification Number, a unique 17-digit code. You can easily find it on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this a simple plug-and-play installation?
For most vehicles, yes. The unit is programmed to your VIN for a direct fit. However, some GM vehicles may require a security relearn procedure to sync the new ECM with the anti-theft system. This can typically be performed by the owner without any special tools. Instructions are widely available online or in service manuals.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM, this replacement part will solve the problem. However, the light can be triggered by many other issues. It is always best to have the trouble codes read by a professional or with a code reader to ensure the ECM is the root cause of your problem before ordering.
What part numbers does this ECM replace?
This module is a direct replacement for GM part numbers 12625455 and 12629009. Please verify one of these numbers is on your original unit to ensure compatibility.