Is your Cadillac, truck, or performance car acting erratically? If you’re dealing with a persistent check engine light, poor fuel economy, strange shifting behavior, or even a no-start condition, the problem often points directly to a failing Engine Control Module (ECM). As the central computer of your vehicle, a faulty ECM can cause a cascade of frustrating and hard-to-diagnose issues. I’ve seen it hundreds of times in my shop: a customer has already replaced multiple sensors, only to find the root cause was the vehicle’s brain all along.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We are offering a genuine GM Engine Control Module, part number 12673195, that arrives at your doorstep professionally programmed with the latest GM software updates. All we need is your vehicle’s VIN at checkout. This critical step ensures the module communicates perfectly with your car’s specific systems, from the engine and transmission to the anti-theft security. You get to skip the expensive trip to the dealership for programming, saving you significant time and money.
Case Study: A Tricky Diagnosis
A 2015 Silverado 1500 came into my bay with an intermittent stalling problem that was driving the owner crazy. No specific codes were stored, just a generic U0100 ‘Lost Communication with ECM/PCM’. The owner had already replaced the fuel pump on another shop’s advice. After checking all the power and ground circuits to the module, I noticed the 5-volt reference signal would occasionally drop out. Instead of a bad sensor, this pointed to an internal failure within the ECM itself. We installed a VIN-programmed module just like this one, performed the security relearn, and the truck has been running flawlessly ever since. It saved the customer from more guesswork and unnecessary parts.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution.
- âś” Check Engine Light is illuminated with communication or internal processor codes (e.g., P0601, P0606, P060A, U0100).
- âś” The engine cranks but refuses to start.
- âś” Noticeable drop in fuel efficiency for no apparent reason.
- âś” The transmission shifts harshly, erratically, or at the wrong times.
- âś” Stalling, hesitation, or misfires while driving.
- âś” Other modules on the vehicle network are flagging communication errors.
A Straightforward Guide to Installation
Installing your new 2014-2016 ATS Engine Control Module is a manageable job for a confident DIYer or any professional technician. Our pre-programming handles the most difficult part for you.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the systems to discharge.
- Locate the ECM: On most of these vehicles (Silverado, Sierra, Escalade), the ECM is found in the engine compartment on the driver’s side. On others like the Corvette or Canyon, it may be on the firewall or cowl area. Refer to your vehicle’s service manual for the exact location.
- Disconnect and Remove: Carefully unplug the large electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, programmed ECM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: Most GM vehicles will require a security relearn procedure to sync the new ECM with the anti-theft system. This can typically be done without special tools by cycling the key. A common method is: Turn the key to ‘ON’ for 10 minutes, then ‘OFF’ for 10 seconds. Repeat this two more times for a total of 3 cycles. On the fourth try, the vehicle should start.
Verified Vehicle Compatibility
This module is a direct replacement for several part numbers, including 12692067, 12676230, 12656993, and 12662034. It is guaranteed to fit the following GM models and more. Please verify your part number or contact us with your VIN.
- âś” 2014-2016 Cadillac ATS (3.6L)
- âś” 2014-2016 Cadillac CTS (3.6L, 6.2L)
- âś” 2014-2016 Cadillac XTS (3.6L)
- âś” 2015-2016 Cadillac Escalade / ESV
- âś” 2014-2016 Chevrolet Corvette
- âś” 2016 Chevrolet Camaro (6.2L)
- âś” 2014-2016 Chevrolet Silverado 1500
- âś” 2015-2016 Chevrolet Suburban 1500 / Tahoe
- âś” 2015-2016 Chevrolet Colorado (3.6L)
- âś” 2014-2016 GMC Sierra 1500 / Sierra Denali 1500
- âś” 2015-2016 GMC Yukon / Yukon XL 1500
- âś” 2015-2016 GMC Canyon (3.6L)
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to load the exact, factory-correct software for your car’s specific options, engine, and transmission. This ensures perfect compatibility and function, just like a new module from the dealer, but without the dealer’s high programming cost.
Is any other programming required after installation?
No, the main engine software is fully programmed. However, you will likely need to perform a simple security relearn procedure (also called a Passlock or Passkey relearn), which pairs the module to your keys. This can usually be done in your driveway in about 30 minutes without special scan tools. We include instructions for this process.
Is this better than a used part from a salvage yard?
Absolutely. A used module will be programmed to the donor vehicle and will not work in your car without being wiped and reprogrammed by a dealer. Our module comes with the latest software updates from GM, which often correct factory drivability issues, and is ready for a much simpler installation process.
What if my original part number is different?
This module, part number 12673195, supersedes and is compatible with several older part numbers like 12676230, 12656993, and others listed. As long as your vehicle is on the compatibility list, this module will work perfectly once programmed to your VIN.
Will this fix my check engine light?
If the check engine light is caused by an internal ECM failure (codes like P0601-P0606) or a fault the ECM is responsible for, then yes, this will resolve the issue. It’s crucial to properly diagnose the problem first, as the light could be on for other reasons, like a bad sensor. This 2014-2016 ATS Engine Control Module is a reliable fix for module-related faults.