Restore Peak Performance to Your GM Vehicle
Is your 2009-2010 Cadillac Escalade EXT, or another compatible GM truck or SUV, suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or a sudden drop in fuel economy? These are classic signs of a failing Engine Control Module (ECM), the central computer of your vehicle. A malfunctioning ECM can disrupt everything from fuel injection and ignition timing to transmission shifting, leaving you with an unreliable and inefficient vehicle. This replacement ECM, part number 12625455, is the definitive solution to restore your vehicle’s factory performance and reliability.
From the Diagnostic Bay
We had a 2009 Sierra 2500 in the shop that was driving the owner crazy. It had a random misfire code that would come and go, and he had already replaced all the spark plugs, coils, and even an injector. The truck ran fine for a day, then the issue would return. After hours of chasing wires and testing sensors, we finally scoped the injector driver circuits directly at the ECM. We found that the driver for cylinder 3 was intermittently dropping out. A new, properly programmed ECM fixed the issue instantly. It’s a powerful reminder that when multiple, seemingly unrelated electronic issues appear, the root cause is often the central computer itself.
Symptoms of a Failing Engine Computer
- ✔ Check Engine Light is on or flashing
- ✔ Engine stalling or misfiring unexpectedly
- ✔ Noticeable decrease in fuel efficiency
- ✔ Vehicle won’t start, or is very difficult to start
- ✔ Rough or inconsistent idling
- ✔ Automatic transmission shifting problems
- ✔ Communication errors with diagnostic scan tools
The Plug-and-Play Solution for Your 2009-2010 Escalade EXT ECM
Don’t settle for a generic, unprogrammed module that requires an expensive trip to the dealership. We provide a comprehensive, ready-to-install solution. When you purchase this ECM, we will flash it with the latest, most stable General Motors software updates specifically for your vehicle. All you need to do is provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN) during checkout. This ensures that the module you receive is perfectly matched to your vehicle’s specific configuration, including engine, transmission, and emissions equipment. This VIN-specific programming makes installation straightforward, eliminating the need for additional programming or calibration. It’s designed to be a direct-fit replacement, allowing you to get your vehicle back on the road quickly and confidently.
This module is a direct replacement for part numbers 12625455 and 12629009 and fits a wide array of GM vehicles from 2009-2010, including the Chevrolet Silverado, GMC Sierra, Tahoe, Suburban, Yukon, and many more. By restoring proper communication and control over your engine’s vital functions, you’ll regain the smooth power, crisp response, and fuel efficiency you expect from your vehicle.
Frequently Asked Questions
What does the ECM do in my truck?
The Engine Control Module (ECM) is your vehicle’s main computer. It controls critical engine functions like fuel mixture, ignition timing, and emissions systems by reading data from various sensors throughout the vehicle. A properly functioning ECM is essential for performance, fuel economy, and reliability.
Is this ECM difficult to install?
Installation is typically straightforward. On most GM trucks and SUVs like the Escalade, the ECM is located in the engine bay on the driver’s side. It involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module to swap in the new one. Since we program it to your VIN, no further dealer programming is required.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the ECM with the exact software and calibrations for your specific vehicle’s engine, transmission, and options. This ensures 100% compatibility and a true plug-and-play installation without any error codes.
Will this fix my check engine light?
If the check engine light and associated diagnostic trouble codes (DTCs) are caused by a faulty ECM, then yes, this part will resolve the issue. We recommend having your vehicle scanned to confirm the codes point towards an internal module failure before ordering.
Does this part fit vehicles other than the Escalade EXT?
Yes, this ECM is compatible with a wide range of 2009-2010 GM vehicles, including the Silverado, Sierra, Suburban, Tahoe, Yukon, Express/Savana vans, and more. Please check the detailed fitment list on this page to confirm compatibility with your specific model and engine.