Is Your Chevrolet Colorado or GM Truck Running Rough?
If your 2015-2016 Chevrolet Colorado is experiencing perplexing issues like random stalling, a persistent check engine light, poor fuel economy, or a complete no-start condition, the root cause is often a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, responsible for managing everything from fuel injection and ignition timing to emissions controls and transmission shifting. When it fails, it can create a cascade of problems that are frustrating and difficult to diagnose. This isn’t just an inconvenience; it’s a critical component failure that can leave you stranded. This genuine GM Engine Control Module, part number 12673195, is the definitive solution to restore your truck’s performance, reliability, and efficiency.
From the Diagnostic Bay
We had a 2015 GMC Canyon (which uses the same platform as the Colorado) come into the shop with a list of strange symptoms. The owner had already replaced the mass airflow sensor and two O2 sensors trying to chase down a check engine light and a rough idle. The codes were intermittent and didn’t point to a single component. After hours of diagnostics, we hooked up a scope to the injector control circuits and saw a noisy, erratic signal coming from the ECM. The internal driver for cylinder 3 was failing under load. We installed a VIN-programmed ECM, performed the security relearn, and the truck ran perfectly. It’s a classic case where chasing sensors costs more time and money than addressing the central computer that controls them all.
Common Symptoms of a Failing Engine Control Module
- ✔ Persistent and often multiple Check Engine Lights (CEL).
- ✔ Unexplained drops in fuel mileage.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Apparent transmission shifting problems or harsh shifts.
- ✔ Misfire codes even after replacing plugs and coils.
- ✔ Loss of communication with the module when using a diagnostic scan tool.
The Importance of a Properly Programmed 2015-2016 Colorado ECM
Simply installing a used or new ECM from another vehicle will not work. Modern GM vehicles feature complex anti-theft systems and vehicle-specific software calibrations that are tied directly to the Vehicle Identification Number (VIN). Our service eliminates the guesswork and the need for an expensive trip to the dealership. When you purchase this module, we use your VIN to flash it with the latest, most up-to-date software directly from GM. This ensures that all parameters for your specific engine, transmission, and emissions equipment are perfectly matched. This VIN-specific programming is critical for proper engine function, fuel efficiency, and seamless communication with all other modules in your truck.
A Plug-and-Play Solution
Because we handle the programming before shipment, the installation process is dramatically simplified. In most cases, you or your mechanic will only need to perform a simple security relearn procedure after the physical installation, which can often be done without specialized tools. This saves you hundreds of dollars in dealership labor and programming fees. You receive a module that is ready to be integrated into your vehicle, restoring it to factory specifications. This is the most efficient and reliable way to replace a faulty 2015-2016 Colorado ECM.
Broad GM Vehicle Compatibility
While this is a primary replacement for the 2015-2016 Colorado ECM, this module is also a direct replacement for a wide range of other GM cars, trucks, and SUVs. Please verify your original part number or consult the fitment list below to ensure compatibility with your specific vehicle. This module is interchangeable with part numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12663391, 12672963, and 12669318.
Fits Models Including:
- 2015-2016 Cadillac ATS (3.6L)
- 2014-2016 Cadillac CTS (3.6L, 6.2L)
- 2014-2016 Cadillac XTS (3.6L)
- 2015-2016 Cadillac Escalade / ESV
- 2016 Chevrolet Camaro (6.2L)
- 2014-2016 Chevrolet Corvette
- 2014-2016 Chevrolet Silverado 1500
- 2015-2016 Chevrolet Suburban 1500
- 2015-2016 Chevrolet Tahoe
- 2015-2016 GMC Canyon (3.6L)
- 2014-2016 GMC Sierra 1500 / Sierra Denali 1500
- 2015-2016 GMC Yukon / Yukon XL 1500
Frequently Asked Questions
Do I need to send you my old ECM?
No, there is no core charge or need to send us your original module. We program this replacement unit using the VIN you provide during checkout, so it arrives ready for installation in your vehicle.
What information do you need from me?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN. This is absolutely essential for us to load the correct GM-certified software and calibrations for your specific engine, transmission, and options.
Is this module difficult to install?
The physical replacement is typically straightforward, involving disconnecting the battery, unplugging the electrical connectors, and unbolting the module. However, after installation, a security relearn procedure (sometimes called a key relearn or Passlock relearn) is often required. Instructions for this procedure are widely available and usually do not require special tools.
Will this fix my check engine light?
If the check engine light and other symptoms are being caused by a faulty ECM, then yes, this part will resolve those issues. It is crucial to ensure a proper diagnosis has been performed to confirm the ECM is the point of failure before ordering.
What if my part number is slightly different?
This module, 12673195, supersedes and is compatible with several other GM part numbers, including 12692067, 12676230, 12656993, and more as listed above. As long as your original part number is on our compatibility list, this module will work for your vehicle once programmed.