Restore Peak Performance to Your GM Vehicle
Is your 2015-2016 GMC Yukon, or another compatible GM vehicle, suffering from frustrating and unpredictable issues? A faulty Engine Control Module (ECM) is often the hidden culprit behind problems that can seem impossible to diagnose. From a persistent Check Engine Light to stalling, rough idling, or a complete no-start condition, a failing ECM can disrupt your vehicle’s entire operation. This isn’t just an inconvenience; it affects fuel economy, reliability, and your peace of mind on the road. This replacement ECM, part number 12669318, is the definitive solution, arriving at your door fully programmed with the latest GM software for your specific vehicle.
Case Study: A Tricky Diagnosis
I recently had a 2015 Yukon in the bay that was giving its owner fits. The vehicle would randomly stall at stoplights and occasionally refuse to start, but there were no consistent, hard fault codes—just a few intermittent U0100 (Lost Communication With ECM/PCM) codes stored in other modules. We checked the usual suspects: battery, alternator, grounds, and wiring harnesses, all of which tested fine. The symptoms pointed to a thermal failure inside the ECM. After swapping in a pre-programmed module just like this one, the Yukon ran flawlessly. The internal circuitry of the original ECM was breaking down when it got hot, a common failure I’ve seen dozens of times. This simple swap saved the customer hundreds in diagnostic fees and got them back on the road with confidence.
Is Your Vehicle Exhibiting These Red Flags?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, the engine’s computer may be the root cause. As a technician, these are the classic symptoms I look for when diagnosing a potential ECM failure.
- ✔ Check Engine Light is illuminated with codes like P0601, P0606 (Internal Control Module Failure), or various communication codes (U-codes).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency.
- ✔ Rough or erratic engine idling and stalling.
- ✔ The transmission shifts harshly or at the wrong times.
- ✔ Apparent loss of power and poor acceleration.
Your Straightforward Installation Guide
One of the biggest advantages of this module is that it arrives ready to install, with no need for an expensive trip to the dealership for programming. You can perform this replacement with basic hand tools right in your driveway.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before proceeding.
- Locate the ECM: On most compatible trucks and SUVs like the Yukon, Tahoe, and Silverado, the ECM is located in the front of the engine compartment on the driver’s side, near the air filter box.
- Disconnect the Connectors: Carefully unlatch and remove the electrical wiring harness connectors from the old module. Inspect them for any signs of corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. It’s typically held in place by a few bolts.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and securely fasten the bolts.
- Reconnect Everything: Plug the wiring harness connectors firmly into the new ECM until they click into place. Reconnect the negative battery terminal.
- Final Steps: Your vehicle is ready to start. In some cases, a security or crank position sensor relearn procedure may be required, which can be done with many professional-grade scan tools.
Verified Fitment For Your General Motors Vehicle
This ECM is a direct replacement for a wide range of popular GM cars, trucks, and SUVs. Please verify your vehicle and any specific options (like engine size or part ID) are listed below to ensure compatibility. This module replaces part numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318.
- ATS (2014-2016)
- CAMARO (2016) – 6.2L
- CANYON (2015-2016) – 3.6L
- COLORADO (2015-2016) – 3.6L
- CORVETTE (2014-2016)
- CTS (2014-2016) – 3.6L or 6.2L
- ESCALADE / ESCALADE ESV (2015-2016)
- SIERRA 1500 / DENALI 1500 (2014-2016)
- SILVERADO 1500 PICKUP (2014-2016)
- SUBURBAN 1500 (2015-2016)
- TAHOE (2015-2016)
- XTS (2014-2016) – 3.6L
- YUKON / YUKON XL 1500 (2015-2016)
Frequently Asked Questions
How does the programming process work?
It’s simple. After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number). Our technicians use this VIN to load the latest, most stable GM-approved software directly onto the module before it ships. This ensures it communicates perfectly with your vehicle’s specific systems.
Is this a true plug-and-play part?
Yes, for over 95% of vehicles. Because it comes pre-programmed to your VIN, you will not need a dealership scan tool for software installation. In some rare cases, a minor security or sensor relearn procedure may be necessary, but the core programming is complete.
Will this fix my vehicle’s check engine light?
If the check engine light is caused by an internal failure of the ECM (common codes P0601-P0606) or related communication errors, this module is the correct fix. However, you should always ensure other potential causes (sensors, wiring) have been properly diagnosed first.
Where do I find my VIN?
Your VIN can be found on a metal plate on the driver’s side of the dashboard (viewable through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
What if I have a different part number on my original ECM?
This module is a direct replacement for several part numbers, including 12692067, 12676230, 12662034, and more as listed above. As long as your original part number is on our compatibility list, this module will work correctly.