Is Your GMC Canyon Running Rough? The ECM Might Be the Culprit.
If your 2009, 2010, 2011, or 2012 GMC Canyon is experiencing frustrating issues like a persistent Check Engine Light, erratic idling, stalling, or a sudden drop in fuel economy, the problem may lie with its most critical component: the Engine Control Module (ECM). The ECM is the central computer of your truck, responsible for managing everything from fuel injection and ignition timing to emissions controls and transmission shifting. When it begins to fail, it can cause a cascade of problems that are often difficult to diagnose.
Don’t let a faulty computer keep your reliable truck off the road. This genuine GM Engine Control Module, part number 12628911, is the definitive solution to restore your vehicle’s performance, efficiency, and dependability. We take the guesswork and hassle out of the replacement process by programming the module specifically to your vehicle’s VIN before it ever leaves our facility. This ensures a seamless installation and proper communication with all other vehicle systems, a critical step that often requires an expensive trip to the dealership.
From the Diagnostic Bay
We recently had a 2011 Canyon in the shop with a list of confusing symptoms. The owner reported intermittent stalling at stoplights, a check engine light with codes for multiple sensor failures (O2, MAF), and a noticeable hesitation during acceleration. He had already replaced two of the sensors with no improvement. After running a full diagnostic, we found that the 5-volt reference signal from the ECM was fluctuating wildly, causing the sensors to send faulty data. Instead of continuing to chase phantom sensor issues, we identified the root cause: a failing ECM. By installing a VIN-programmed module like this one, we were able to solve all the issues in one go, saving the customer hundreds of dollars in unnecessary parts and labor.
Common Symptoms of a Failing 2009-2012 Canyon ECM
- ✔ Persistent and illuminated Check Engine Light (CEL)
- ✔ Engine stalling or stumbling for no apparent reason
- ✔ Noticeable decrease in fuel mileage (MPG)
- ✔ Difficulty starting the engine or a complete no-start condition
- ✔ Rough or erratic engine idling
- ✔ Poor acceleration or a feeling of power loss
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Communication errors with diagnostic scan tools
The Right Part, Programmed and Ready for Installation
Replacing an ECM isn’t just about swapping a box. Modern vehicles require the module to be programmed with the correct software and vehicle-specific information to function. Our process simplifies this for you. When you order, you provide us with your truck’s VIN. Our technicians then use official GM equipment to load the latest, most up-to-date factory software for your exact vehicle configuration. This means the 2009-2012 Canyon ECM arrives at your door ready for a straightforward installation. While a simple security relearn procedure may be required after installation (a process that can often be done without special tools), you get to skip the expensive programming fees and scheduling headaches at a repair shop or dealership.
Guaranteed Compatibility and Fitment
This module is a direct replacement for a wide range of GM vehicles. It is interchangeable with the following service numbers, ensuring you receive the correct hardware for your application:
Interchangeable Part Numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, 12678512
While this listing is focused on the GMC Canyon, this ECM also fits a variety of other makes and models. Please verify your part number or consult the list below:
- CANYON/COLORADO (2009-2012): Electronic Control Module; (RH firewall), 2.9L & 3.7L
- HUMMER H3 (2009-2010): Electronic Control Module; (RH firewall), 3.7L
- ENVOY / TRAILBLAZER / SAAB 9-7X (2009): Electronic Control Module; (LH engine), 5.3L & 6.0L
- CADILLAC CTS / STS / SRX / XLR / DTS & BUICK LUCERNE (2009-2011): Various engine applications, please match part number.
- CORVETTE (2009): Electronic Control Module; (RH engine compartment), ZR1
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) allows us to program the ECM with the exact software and calibrations for your truck’s specific engine, transmission, and options. This is crucial for proper engine performance, fuel economy, and emissions compliance, and it eliminates the need for you to have it programmed at a dealership.
Is this part difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. After installing the new one, you may need to perform a security relearn procedure, which pairs the new ECM to your vehicle’s anti-theft system. Instructions for this are widely available and often do not require special tools.
Will this fix my Check Engine Light?
If the Check Engine Light is on due to an internal failure of the ECM, then yes, this part will resolve the issue. However, it’s always recommended to have the codes read by a scanner first to ensure the problem isn’t a faulty sensor or other component that the ECM is correctly identifying.
Is this a brand new part?
This is a high-quality, tested, and verified original equipment part that has been prepared for service. It is loaded with fresh, vehicle-specific software from GM, ensuring it performs to factory specifications.
How do I find the part number on my current ECM?
The part number is typically printed on a sticker on the case of the module itself. On the 2009-2012 Canyon, the ECM is located on the right-hand (passenger side) of the firewall in the engine bay. You will see a service number (e.g., 12628911) on the label.