Restore Your GM Truck’s Brain and Get Back on the Road
Is your 2015-2016 Chevy Colorado or other GM vehicle acting possessed? Unexplained stalling, a persistent check engine light, poor fuel economy, or erratic transmission shifting are classic signs that the heart of your vehicle’s electronics—the Engine Control Module (ECM)—is failing. As a technician with over two decades of experience, I’ve seen firsthand how a faulty ECM can turn a reliable truck into a source of constant frustration. This isn’t just an inconvenience; it’s a critical component for engine performance, emissions, and overall vehicle safety.
This isn’t just a replacement part; it’s a complete solution. We are providing a genuine GM Engine Control Module, part number 12672963, that comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This crucial step ensures that the module communicates flawlessly with all other systems in your truck, just as it did from the factory. We load the latest GM-certified software, so you’re not just fixing a problem—you’re ensuring your engine operates on the most current, stable calibrations available.
From the Diagnostic Bay: The Case of the Confusing Colorado
A few months back, a 2015 Colorado 3.6L was towed into my shop. The owner was at his wit’s end. It would start and run fine for a week, then suddenly die at a stoplight and refuse to restart for an hour. Other shops had replaced the fuel pump and a few sensors, but the problem persisted. My scan tool pulled a P0606 (ECM/PCM Processor Fault) and a few U-codes, indicating a communication breakdown. After verifying the wiring and grounds were solid, I knew the ECM itself was the culprit. The internal processor was failing intermittently. We installed a VIN-programmed module just like this one, and the truck has been running without a single hiccup since. This highlights why shotgunning parts doesn’t work; a precise diagnosis pointing to a quality, correctly programmed module is the real fix.
Is Your Vehicle Showing These Symptoms of ECM Failure?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, your engine computer is the likely cause:
- ✔ Check Engine Light is on with codes like P0601, P0602, P0606, or other communication (U-series) codes.
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained stalling or rough idling, especially when warm.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Loss of power and sluggish acceleration.
- ✔ Other modules, like the transmission or ABS controller, are setting communication fault codes.
A Straightforward Guide to Installation
Replacing the ECM is a job most DIYers with basic tools can handle. Our pre-programming service saves you a trip to the dealer and the cost of expensive programming tools. Just follow these general steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system capacitors to discharge.
- Locate the ECM: On the 2015-2016 Colorado/Canyon, the ECM is typically mounted to the firewall on the right-hand (passenger) side of the engine bay. On most trucks and SUVs like the Silverado or Tahoe, it’s on the driver’s side front of the engine compartment.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Never force them. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. It’s usually held in place by a few 10mm bolts.
- Install the New Module: Mount your new, pre-programmed ECM in place and tighten the bolts securely.
- Reconnect Everything: Plug the electrical harnesses back into the new module until they click, ensuring they are fully seated. Reconnect the negative battery terminal.
- Final Step: In some cases, a security or anti-theft relearn procedure may be necessary, which can often be done without a scan tool. Instructions are widely available online for your specific model.
Verified Vehicle Compatibility List
This module is a direct replacement for multiple part numbers and fits a wide array of General Motors vehicles. Please verify your vehicle is on this list. It is compatible with part numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318.
CAMARO 16 (6.2L)
CANYON 15-16 (3.6L)
COLORADO 15-16 (3.6L)
CORVETTE 14-16
CTS 14-16 (3.6L, 6.2L)
ESCALADE & ESV 15-16
SIERRA 1500 PICKUP 14-16
SIERRA DENALI 1500 14-16
SILVERADO 1500 PICKUP 14-16
SUBURBAN 1500 15-16
TAHOE 15-16
XTS 14-16 (3.6L)
YUKON & YUKON XL 1500 15-16
Note: Some models have specific ID requirements. Please match your part number or contact us with your VIN if you are unsure.
Frequently Asked Questions About Your ECM Replacement
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive this information, as the programming is specific to your vehicle.
Is any additional programming required after installation?
No. This ECM comes fully programmed with the latest GM software matched to your VIN. In most cases, it is a direct installation. Some vehicles may require a simple key relearn or anti-theft security relearn procedure, which typically does not require special tools.
Where is the ECM located on my 2016 Chevy Colorado?
On the 2015-2016 Chevrolet Colorado and GMC Canyon with the 3.6L engine, the Engine Control Module is located on the right-hand (passenger side) of the firewall in the engine compartment.
Will this fix my specific problem?
This module will correct issues directly caused by a faulty ECM, such as internal processor errors (P0606), memory faults (P0601), and related communication failures. While it solves the most common electronic engine problems, we always recommend a proper diagnosis to confirm the ECM is the point of failure before ordering.
Is this a new or used part?
This is a high-quality, tested, and verified genuine GM part that has been inspected to meet or exceed original performance standards. It is not a new part, but a reliable and functional component ready for service.