Restore Peak Performance to Your GMC Canyon
If you’re dealing with frustrating engine problems in your 2009-2012 GMC Canyon, a failing Engine Control Module (ECM) is often the hidden culprit. As a technician with over two decades of experience, I’ve seen firsthand how a faulty engine computer can cause a cascade of issues that seem impossible to pin down. From a persistent Check Engine Light to a truck that refuses to start, the ECM is the brain of your vehicle’s operation, and when it falters, everything else follows. This isn’t just a replacement part; it’s a direct solution to restore your truck’s reliability and drivability.
This genuine GM engine computer, service number 12630464, arrives at your door fully programmed with the latest factory software. We handle the complex part for you. Simply provide your vehicle’s VIN during checkout, and our experts will flash the module specifically for your truck’s configuration. This means no expensive trips to the dealership for programming and no need for specialized scan tools. You get a component that’s ready for installation, getting you back on the road quickly and confidently. This is the most efficient way to replace a faulty 2009-2012 Canyon Engine Module.
From the Diagnostic Bay: The Case of the Intermittent Stall
A few months back, a 2011 Canyon was towed into my shop. The owner was at his wit’s end. The truck would run fine for days, then suddenly stall at a stoplight and refuse to restart for an hour. He had already replaced the fuel pump and crankshaft position sensor, but the problem persisted. No consistent trouble codes were stored, just a few random communication errors (U-codes) that would clear. After running a full diagnostic, I noticed the 5-volt reference signal to the sensors would occasionally drop out. This pointed directly to an internal failure in the ECM. We installed a pre-programmed module, performed the security relearn, and the truck has been running perfectly ever since. It’s a classic example of how a failing 2009-2012 Canyon Engine Module can mimic other component failures.
Is Your Truck Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Check Engine Light is on with codes pointing to internal processor failure (e.g., P0601, P0606).
- ✔ Engine cranks but will not start.
- ✔ Intermittent stalling or rough idling for no apparent reason.
- ✔ Poor fuel economy and noticeable loss of power.
- ✔ Communication errors with other modules on the vehicle (U-codes).
- ✔ Seemingly unrelated electrical issues or warning lights.
- ✔ Harsh or erratic automatic transmission shifting.
A Straightforward Guide to Installation
Installing your new engine module is a manageable job for a DIYer with basic tools. Follow these steps carefully for a smooth installation.
- Safety First: Disconnect the negative terminal from your truck’s battery and secure it away from the post to prevent accidental contact.
- Locate the ECM: On the 2009-2012 Canyon, the ECM is typically mounted to the firewall on the right-hand (passenger) side of the engine compartment.
- Disconnect Connectors: Carefully release the locking tabs and disconnect all electrical wiring harness connectors from the old module. Inspect them for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will reuse it.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harness connectors firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: In many cases, you will need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the new ECM to sync with your vehicle’s anti-theft system. Your truck may not start until this is completed.
Verified Vehicle Compatibility
This module is a direct replacement for service number 12630464 and is interchangeable with part numbers 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, and 12678512. It is confirmed to fit the following vehicles:
- ✔ GMC CANYON 2009-2012 (2.9L, 3.7L)
- ✔ CHEVROLET COLORADO 2009-2012 (2.9L, 3.7L)
- ✔ HUMMER H3 / H3T 2009-2010 (3.7L)
- ✔ CADILLAC CTS 2009 (6.2L)
- ✔ CADILLAC DTS 2009-2011
- ✔ CADILLAC SRX 2009 (4.6L)
- ✔ CADILLAC STS 2009-2010 (4.4L, 4.6L)
- ✔ CADILLAC XLR 2009 (ID 12636659 or 12625453)
- ✔ CHEVROLET CORVETTE 2009 (ZR1)
- ✔ CHEVROLET TRAILBLAZER 2009 (6.0L)
- ✔ GMC ENVOY 2009 (5.3L)
- ✔ BUICK LUCERNE 2009-2011 (4.6L)
- ✔ SAAB 9-7X 2009
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the module with the correct GM software and calibrations for your specific engine, transmission, and options. This ensures perfect compatibility and performance right out of the box.
Is this a plug-and-play part?
Yes, once we program it to your VIN, it is ready to be installed. The only additional step required after installation is a simple security relearn procedure, which does not require any special tools and can be done in your driveway.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by an internal ECM failure (like code P0601), then yes, this part will resolve the issue. It’s crucial to have your vehicle properly diagnosed to ensure the ECM is the root cause before ordering.
What if I have a different part number on my old module?
This module replaces a wide range of original service numbers. Please check the list of interchangeable part numbers provided in our description. As long as your original number is on that list, this module is the correct replacement for you.