If you’re dealing with a frustrating no-start condition, a persistent check engine light, or erratic engine behavior in your GM vehicle, a failing Engine Control Module (ECM) is often the culprit. As the brain of your engine, a faulty ECM can cause a cascade of problems that are difficult to diagnose. This isn’t just an inconvenience; it affects your vehicle’s performance, fuel economy, and reliability. I’ve seen countless vehicles in my bay—from Cadillac sedans to hardworking Silverado trucks—sidelined by these exact issues.
This is your direct, reliable solution: a genuine GM Engine Control Module, part number 12672963, delivered to your door fully programmed to your vehicle’s specific VIN. We handle the complex part—flashing the module with the latest, most stable software from General Motors. This means you get a component that is ready for installation right out of the box, eliminating the need for an expensive trip to the dealership for programming. This is the same process we use in the shop to guarantee a successful repair, and now you can get that same level of confidence for your own vehicle.
Case Study: A Tricky Diagnosis
A 2015 Sierra 1500 came into my shop on a tow truck. The owner said it would crank but not start, and the check engine light was on. He’d already replaced the fuel pump and crank sensor with no luck. My initial scan pulled a U0100 (Lost Communication with ECM) and a P0601 (Internal Control Module Memory Check Sum Error). These codes together are a huge red flag for the ECM itself. After verifying power and ground to the module, it was clear the ECM was internally fried. Instead of a costly dealer part and a two-day wait for programming, we used one of our pre-programmed modules. The swap took 15 minutes, and the truck fired right up. This part saved the customer time, money, and a lot of headaches.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Check Engine Light is illuminated with codes like P0601, P0606, or U0100.
- ✔ Engine cranks but refuses to start.
- ✔ Stalling, hesitation, or rough idling.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Failed emissions test.
- ✔ Communication issues with diagnostic scan tools.
- ✔ Seemingly random electrical problems or warning lights.
A Straightforward Guide to Installation
One of the biggest benefits of our VIN-programmed 2014-2016 ATS ECM is the simple installation. No special tools or software are required. While the exact location varies by model (see fitment list), the general process is the same.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the ECM: The module is typically found in the engine bay, either on the firewall or inner fender. On some models like the Corvette, it’s located in the passenger-side cowl area.
- Disconnect the Old Module: Carefully unplug the electrical connectors. Most have a locking tab or lever that needs to be released first. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed ECM into place and securely reconnect the electrical connectors. You should hear a click as they lock.
- Reconnect the Battery: Re-attach the negative battery terminal. The vehicle may need to complete a security relearn procedure, which often involves turning the key to the ‘ON’ position for 10-15 minutes. Your vehicle’s manual will have specific instructions if needed.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12672963 and is interchangeable with several other part numbers. Please verify your vehicle is on this list for guaranteed fitment. We program the module based on the VIN you provide, ensuring perfect compatibility.
- Cadillac ATS (2014-2016)
- Cadillac CTS (2014-2016)
- Cadillac Escalade / ESV (2015-2016)
- Cadillac XTS (2014-2016)
- Chevrolet Camaro (2016)
- Chevrolet Colorado (2015-2016)
- Chevrolet Corvette (2014-2016)
- Chevrolet Silverado 1500 (2014-2016)
- Chevrolet Suburban 1500 (2015-2016)
- Chevrolet Tahoe (2015-2016)
- GMC Canyon (2015-2016)
- GMC Sierra 1500 / Denali 1500 (2014-2016)
- GMC Yukon / Yukon XL 1500 (2015-2016)
Frequently Asked Questions
Do I need to do any programming after I receive it?
No. We flash the module with the latest GM software using the VIN you provide during checkout. It arrives ready to install. In some cases, a simple security or crankshaft position sensor relearn procedure may be necessary, which can be done without special tools.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to load the exact software calibration that your vehicle’s specific configuration (engine, transmission, options) requires. This ensures seamless communication with other modules and proper engine function.
Is this compatible with other part numbers?
Yes, this ECM is a direct replacement for several part numbers, including 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, and 12669318.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (e.g., codes P0601, P0606), then yes, this part will resolve the issue. It’s crucial to properly diagnose the problem first, as the light can be triggered by many other components like sensors or wiring.
What if my original part number isn’t on the list?
Please contact us with your VIN and original part number before ordering. We can verify compatibility to ensure you receive the correct part for your vehicle.