Restore Peak Performance to Your GM Vehicle
Is your Cadillac, Chevy, or GMC acting up? Experiencing frustrating issues like a persistent check engine light, poor fuel economy, rough idling, or even a no-start condition? The problem often lies with a failing Engine Control Module (ECM), the central computer of your vehicle. This isn’t just a part; it’s the brain behind your engine’s performance and efficiency. When it falters, the entire vehicle suffers. We offer a reliable, direct-fit solution with this professionally programmed ECM, part number 12672537.
As a technician with over two decades of experience, I’ve seen firsthand how a faulty ECM can send owners on a wild goose chase, replacing perfectly good sensors and parts. This module eliminates the guesswork. We take the hassle out of the repair by programming the unit specifically for your vehicle using your VIN. This means it arrives loaded with the latest official GM software updates, ensuring optimal communication between all your vehicle’s systems. You get a part that’s ready to install right out of the box, saving you a costly trip to the dealership for programming.
From the Diagnostic Bay: The Intermittent Stall Case
A customer brought in a 2015 Cadillac ATS 3.6L with a complaint that stumped two other shops: it would randomly stall at stoplights and sometimes refuse to restart for 10-15 minutes. There were no consistent trouble codes, just a history of random communication errors. After verifying fuel pressure and spark, my gut told me it was the computer. Heat soak was likely causing an internal failure in the 2014-2016 ATS ECM. We installed one of our VIN-programmed modules, and the problem vanished instantly. The customer was thrilled to have their car back, running reliably without the fear of getting stranded.
Common Signs Your GM Engine Control Module is Failing
If you’re noticing any of the following issues, a faulty ECM could be the root cause. Replacing it with a quality, correctly programmed unit is often the definitive fix.
- ✔ Check Engine Light is illuminated, often with codes like P0601, P0606, or U-series communication codes.
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ The vehicle experiences intermittent stalling or hesitation during acceleration.
- ✔ Rough or unstable engine idle.
- ✔ Automatic transmission shifting feels harsh or erratic.
- ✔ Failure to pass state emissions testing.
A Straightforward Guide to Installation
Installing your new 2014-2016 ATS ECM is a manageable job for a confident DIYer or any professional mechanic. Following these steps ensures a smooth process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes for the system to fully discharge.
- Locate the ECM: On most listed models, the ECM is found in the engine compartment (often on the driver’s or passenger’s side firewall or fender) or under the cowl. Consult a vehicle-specific repair manual if you’re unsure.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and gently pull them straight out from the module. Never force them.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need to reuse it.
- Install the New ECM: Mount your new, pre-programmed module in place and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harnesses back into the new ECM, ensuring they click securely into place. Reconnect the negative battery terminal.
- Perform Relearn Procedure: While the module is programmed, your vehicle may require a security or crank-shaft position sensor relearn. A common GM procedure is to turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 30 seconds, and repeat two more times before attempting to start the engine.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12672537 and is compatible with several other part numbers. Please verify your vehicle is on this list before ordering. We program the module based on the VIN you provide to ensure perfect function.
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 / DENALI 14-16
SILVERADO 1500 PICKUP 14-16
SUBURBAN 1500 15-16
TAHOE 15-16
YUKON / XL 1500 15-16
XTS 14-16 (3.6L, VIN 8)
Note: This list is a summary. Please match your original part number or use the fitment tool for exact confirmation.
Why do you need my VIN?
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential. It allows us to program the 2014-2016 ATS ECM with the exact software and calibrations your specific vehicle requires, including engine type, transmission, and other options. This ensures seamless integration and performance right out of the box.
Is this a plug-and-play part?
Yes, for the most part. The module is pre-programmed to your VIN, which handles the most complex part of the job. However, some GM vehicles may require a simple ‘security relearn’ or ‘crankshaft position relearn’ procedure after installation, which can typically be done without special tools.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (common codes P0601-P0606), then yes, this module will resolve the issue. It’s crucial to properly diagnose the problem first to ensure the ECM is the actual point of failure.
What if my part number is slightly different?
This module is a direct replacement for several part numbers, including 12692067, 12676230, and 12656993, among others listed. As long as your original part number is on our compatible list, this module will work perfectly once programmed to your VIN.