Is Your GM Truck or SUV Running Rough?
If you’re dealing with a persistent check engine light, unexplained stalling, harsh shifting, or even a no-start condition in your 2009-2010 GM vehicle, the Engine Control Module (ECM) is a likely culprit. As a mechanic with over 20 years of experience under the hood, I’ve seen firsthand how a failing ECM can create a cascade of frustrating and hard-to-diagnose problems. Itโs the brain of your engine, and when it falters, everything from fuel delivery to spark timing is thrown off.
The Simple, Reliable Solution: A VIN-Programmed ECM
Forget expensive dealership visits and the hassle of finding a shop that can program a new module. We offer a direct, effective solution. This Engine Control Module, part number 12629009 (also compatible with 12625455), arrives at your door completely programmed to your vehicle’s specific Vehicle Identification Number (VIN). We flash it with the latest, most stable software updates directly from GM. This isn’t just a replacement part; it’s a restoration of your vehicle’s original performance and reliability.
Expert Pro Tip: Check Your Grounds First!
Before you condemn your ECM, take 10 minutes to check the main engine and body ground connections. In my shop, I’ve seen countless GM trucks and SUVs where a loose or corroded ground strap caused erratic voltage, mimicking classic ECM failure symptoms like random warning lights and stalling. A simple cleaning with a wire brush at the connection points can sometimes save you the cost of a new module. If the grounds are clean and tight and the problem persists, the ECM is your next logical step.
Common Symptoms of a Failing 2009-2010 Escalade EXT ECM
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, this module is the solution you need:
- โ Persistent Check Engine Light (CEL) with communication error codes.
- โ Engine stalling or cutting out for no apparent reason.
- โ Complete no-start condition where the engine cranks but won’t fire.
- โ Noticeable decrease in fuel economy.
- โ Poor engine performance, hesitation, or misfires.
- โ Erratic or harsh automatic transmission shifting.
Plug-and-Play Installation: No Dealer Visit Required
We make this repair as straightforward as possible. Because we program the module to your VIN before shipping, it’s ready to install right out of the box. In most cases, you will not need to perform any additional security relearn procedures, saving you time and money.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the ECM: On most compatible trucks and SUVs like the Escalade, Silverado, and Sierra, the ECM is located in the engine compartment on the driver’s side, near the firewall or inner fender. For vans like the Express/Savana, it’s often at the LH rear of the engine compartment.
- Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harnesses from the old module.
- Swap the Modules: Unbolt the old ECM and mount the new, pre-programmed module in its place.
- Reconnect Everything: Securely plug the wiring harnesses into the new ECM until they click into place. Reconnect the negative battery terminal.
- Start the Vehicle: Your vehicle should now start and run correctly with the new module.
By providing us with your VIN at checkout, you ensure a perfect match and a hassle-free repair. Restore the power, efficiency, and reliability of your vehicle with an ECM that’s built to last and programmed for precision. This part is a direct fit for a wide range of 2009-2010 GM models, including the Escalade, Silverado, Sierra, Tahoe, Suburban, Yukon, and many more. Please verify your part number (12629009 or 12625455) and check the detailed fitment list to confirm compatibility.