Restore Peak Performance to Your GM Vehicle
Is your Chevrolet Colorado, GMC Canyon, or other compatible GM vehicle suffering from perplexing issues like a persistent check engine light, poor fuel economy, stalling, or a complete no-start condition? These are common indicators of a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, managing everything from fuel injection and ignition timing to emissions controls. When it fails, the entire system is compromised. This replacement Engine Control Module, part number 12628911, is the definitive solution to get your truck or car running reliably again.
This isn’t just a part in a box. We provide a comprehensive service that makes your repair as simple as possible. Each module is meticulously programmed with the latest official GM software updates specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) at checkout. This critical step ensures that when you receive your part, it communicates flawlessly with your vehicle’s other systems, eliminating the need for an expensive trip to the dealership for programming.
Diagnosing a Faulty Engine Control Module
A failing ECM can manifest in numerous ways, often mimicking other sensor or component failures. If you’ve been chasing down issues with no success, it’s time to consider the ECM. Here are the most common symptoms associated with a faulty module:
Common Symptoms of ECM Failure
- ✔ Check Engine Light is illuminated with various, often inconsistent, trouble codes.
- ✔ Engine stalling or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Poor engine performance, hesitation, or rough idling.
- ✔ Transmission shifting problems or harsh shifts.
- ✔ Communication errors with diagnostic scan tools.
Expert Pro Tip
Before replacing your ECM, always perform a thorough check of the vehicle’s battery, charging system, and all main power and ground connections to the module. A weak battery, corroded terminals, or a poor ground can cause symptoms that mimic ECM failure. Verifying these basics can save you time and money in your diagnosis.
The Importance of a Programmed 2009-2012 Colorado ECM
Modern vehicles are complex networks of electronic modules. The ECM must be able to communicate with the Body Control Module (BCM), Transmission Control Module (TCM), and anti-theft system (Passlock/VATS). A generic, unprogrammed module simply will not work. Our VIN-programming service handles this critical step for you. By using your vehicle’s specific VIN, we load the correct software, calibrations, and security information, making this a true plug-and-play solution (a security relearn procedure may be required post-installation, which can often be done without special tools).
This module is a direct replacement for a wide range of GM vehicles and is interchangeable with multiple service numbers, including 12636659, 12639300, 1263605, 12628993, 12625453, 12622175, 12630464, and 12678512. While it is a perfect fit for the 2009-2012 Colorado ECM, it also serves as the correct control unit for models like the Hummer H3, Cadillac CTS, Chevrolet Corvette, and more, as detailed in our comprehensive fitment list. Please verify your part number or contact us with your VIN to confirm compatibility.
Installation and Setup
On the 2009-2012 Chevrolet Colorado and GMC Canyon, the ECM is typically located on the right-hand side (passenger side) of the firewall in the engine bay. Installation involves disconnecting the battery, carefully unplugging the electrical connectors, removing the mounting bolts, and swapping the module. After installation, you will likely need to perform a security relearn procedure to sync the new ECM with your vehicle’s anti-theft system. This procedure varies by model but is often a simple key-on/key-off sequence that can be found in your owner’s manual or online.
Frequently Asked Questions
Is this ECM ready to install right out of the box?
Yes, this ECM comes fully programmed to your vehicle’s VIN with the latest GM software. In most cases, you will only need to perform a simple security/anti-theft relearn procedure after installation, which typically does not require a scan tool.
How do I provide my VIN for programming?
You can enter your 17-digit VIN in the notes section during the checkout process. If you miss it, you can also reply to your order confirmation email with the VIN. We cannot ship your order until we receive this information.
My original ECM has a different part number. Will this still work?
Yes, this module is a direct replacement for several service numbers, including 12636659, 12639300, and others listed in the description. As long as your original part number is on our interchange list, this module will function correctly in your vehicle once programmed.
Do I need to return my old ECM?
No core charge or return is required for this part. You can keep, recycle, or dispose of your old module at your convenience.
What causes an ECM to fail?
ECM failure can be caused by several factors, including voltage overloads from jump-starts or bad alternators, internal circuit board corrosion from moisture intrusion, excessive heat, or simply age and vibration leading to solder joint failure.