Is Your GMC Yukon Experiencing Engine Problems?
If your 2015 or 2016 GMC Yukon is suffering from a persistent check engine light, erratic performance, stalling, or a no-start condition, a failing Engine Control Module (ECM) is a very likely culprit. The ECM is the central computer of your vehicle’s powertrain, responsible for managing everything from fuel injection and ignition timing to transmission shifts and emissions controls. When it begins to fail, it can cause a cascade of confusing and frustrating issues that can be difficult to diagnose.
From the Diagnostic Bay
We recently had a 2015 GMC Yukon in the shop with a complaint of intermittent stalling at stop lights and a check engine light that would come and go. The owner had already replaced the spark plugs and an oxygen sensor with no improvement. Our scan tool pulled a P0606 code, which points directly to an internal processor fault in the ECM. After verifying all power and ground circuits to the module were solid, we confirmed the ECM itself was the issue. Instead of a costly tow to the dealership and a long wait, we sourced a replacement 2015-2016 Yukon ECM that was pre-programmed to the vehicle’s VIN. The installation was straightforward, and after a quick crankshaft position relearn, the Yukon was running perfectly again, saving the customer significant time and money.
The Direct-Fit Solution for Your Vehicle
This isn’t just a generic part off a shelf. This is a complete, ready-to-install solution for your vehicle. We take the guesswork and hassle out of the repair by pre-programming this module specifically for your truck using your Vehicle Identification Number (VIN). This critical step ensures that the ECM has the latest, most stable software from GM and that it will communicate flawlessly with all the other electronic modules in your vehicle, just as the original did. By providing us with your VIN upon purchase, you receive a part that is tailored to your exact vehicle configuration, eliminating the need for expensive dealership programming.
Common Symptoms of a Failing 2015-2016 Yukon ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Trouble codes related to processor faults (e.g., P0601, P0606) or communication errors.
- ✔ Unexplained engine stalling or stumbling, especially when warm.
- ✔ Intermittent no-start or hard-starting conditions.
- ✔ A noticeable drop in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Inability for a diagnostic scan tool to communicate with the engine computer.
Simple Installation Process
Replacing the ECM is a manageable task for a confident DIYer or any professional technician. On most 2015-2016 GMC Yukons, Silverados, and Sierras, the module is located in the left-hand (driver’s side) front of the engine compartment. The basic steps involve disconnecting the negative battery terminal, carefully unplugging the electrical connectors from the old module, unbolting it from its bracket, and then installing the new module in the reverse order. Once installed and the battery is reconnected, your vehicle may require a simple security or crankshaft variation relearn procedure, which can often be performed without specialized tools. This unit allows you to bypass a trip to the dealer entirely.
Guaranteed Compatibility
This ECM, part number 12662034, is a direct replacement for a wide range of GM vehicles and is compatible with numerous original part numbers. If your old module has any of the following numbers, this unit will work for you:
Compatible Part Numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, 12669318
Extensive Vehicle Fitment List:
This module fits a variety of GM cars, trucks, and SUVs. Please verify your specific model and options below:
- ATS: 2014-2016
- CAMARO: 2016 (6.2L)
- CANYON: 2015-2016 (3.6L)
- COLORADO: 2015-2016 (3.6L)
- CORVETTE: 2014-2016
- CTS: 2014-2016
- ESCALADE / ESCALADE ESV: 2015-2016
- SIERRA 1500 / SIERRA 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
Why do you need my vehicle’s VIN?
Your VIN (Vehicle Identification Number) is essential for us to load the exact, correct software and calibration files from GM for your specific vehicle. This ensures the ECM works perfectly with your engine, transmission, and options package, preventing compatibility issues.
Is this part truly plug-and-play?
For most vehicles, yes. Since we pre-program the module, it is ready for installation. However, some GM vehicles may require a simple, tool-free Security Relearn procedure or a Crankshaft Position Variation Relearn to sync with your vehicle completely. Instructions for these procedures are widely available online.
Will I need to take my Yukon to the dealership after installing this?
No. Our VIN programming service is designed to eliminate the need for a post-installation trip to the dealer for software flashing, saving you time and hundreds of dollars in labor costs.
My original part number is different. Will this still work?
Yes, as long as your original part number is on our compatibility list provided above. GM often consolidates and supersedes part numbers over time. This module is the correct service replacement for all the listed numbers.
Where is the ECM located on my 2015 GMC Yukon?
On the 2015-2016 GMC Yukon, as well as related platforms like the Tahoe, Suburban, Silverado, and Sierra, the ECM is typically located in the front of the engine compartment on the driver’s side (LH side).