Restore Peak Performance to Your GMC Yukon XL
Is your 2015-2016 GMC Yukon XL 1500 suffering from perplexing engine issues? Unexplained stalling, poor fuel economy, a persistent check engine light, or a complete no-start condition can often be traced back to a single, critical component: the Engine Control Module (ECM). As the central computer of your vehicle’s powertrain, a failing ECM can create a cascade of problems that are difficult to diagnose and frustrating to live with. This isn’t just a part; it’s the brain of your engine, and when it falters, the entire vehicle suffers.
This replacement Engine Control Module, part number 12673195, is the definitive solution to get your truck running like new again. We take the guesswork and hassle out of the repair process. Unlike a generic module from a parts store or a salvage yard, this unit is professionally programmed to your Yukon’s specific Vehicle Identification Number (VIN) before it ships. This crucial step ensures 100% compatibility with your vehicle’s factory settings, options, and security systems. We load the latest, most stable software updates from GM, often correcting underlying factory issues you may not have even been aware of. This is the closest you can get to a dealership-level repair without the dealership price tag or lengthy service appointments.
From the Diagnostic Bay
We had a 2016 Yukon XL come into the shop with an issue that had stumped two other mechanics. The owner reported intermittent stalling at stoplights and a strange hesitation under light acceleration. No consistent codes were stored, just a few random communication faults that would clear themselves. We checked fuel pressure, scanned for vacuum leaks, and even scoped the ignition system—everything looked perfect. On a hunch, we monitored the live data stream from the ECM and noticed that the processor would occasionally ‘hiccup,’ causing a momentary loss of injector and spark commands. We installed one of our VIN-programmed ECMs, performed the quick security relearn, and the problem was gone for good. The owner was thrilled to have his reliable family hauler back. It’s a classic case of how a failing ECM can mimic a dozen other mechanical problems.
Symptoms of a Failing 2015-2016 Yukon XL ECM
A faulty ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine’s computer may be the culprit:
- ✔ Check Engine Light: The most common symptom, often with codes related to module communication (U-codes), sensor reference voltage, or processor errors (P0600-P0606).
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly while driving or at idle, and you might notice rough running or misfires that don’t seem to be caused by plugs or coils.
- ✔ No-Start Condition: The engine cranks but refuses to start. This can happen if the ECM is not commanding the fuel injectors or ignition coils to fire.
- ✔ Poor Fuel Economy: An ECM that isn’t calculating the air-fuel mixture correctly will lead to a noticeable drop in MPG.
- ✔ Shifting Problems: The ECM works in tandem with the Transmission Control Module (TCM). A faulty ECM can send incorrect data, leading to harsh shifts, delayed engagement, or the transmission going into ‘limp mode’.
- ✔ Erratic Instrument Cluster Behavior: Gauges may act erratically or warning lights may illuminate for no reason due to communication network failures originating from the ECM.
The Superiority of a VIN-Programmed Solution
Why is VIN programming so important? Modern vehicles like your Yukon XL have complex, interconnected systems. A new ECM must be introduced to the vehicle’s network and security system (like Pass-Key III+ or Passlock) to function. Our pre-programming service handles this complex task for you.
Benefits Include:
- Plug-and-Play Installation: For many vehicles, the module is ready to install and start the vehicle right out of the box. Some models may require a simple, 10-minute key relearn procedure that you can do yourself—no special tools needed.
- Latest GM Software: We flash the module with the most recent updates from General Motors, ensuring optimal performance, fuel efficiency, and reliability.
- Guaranteed Compatibility: By using your VIN, we ensure the module is a perfect match for your engine, transmission, and all factory-installed options.
- No Dealer Visit Required: Save hundreds of dollars and avoid the inconvenience of having your vehicle towed to a dealership for programming.
This module is a direct replacement for multiple part numbers, including 12692067, 12676230, 12656993, 12662034, 12672537, 12663391, 12672963, and 12669318. It also fits a wide variety of other GM trucks and SUVs. Please verify the part number or use our fitment tool to confirm compatibility with your specific vehicle.
Frequently Asked Questions
Do I need to send you my old ECM?
No, there is no core charge or need to send in your old module. This is a replacement part that is programmed and sent directly to you.
What information do you need from me?
After you complete your purchase, we will need the 17-digit Vehicle Identification Number (VIN) from your vehicle. You can typically find this on your driver’s side dashboard (visible through the windshield) or on the driver’s side door jamb sticker.
Is any additional programming required after installation?
In most cases, the module is ready to go. However, some GM vehicles require a simple security relearn procedure (also known as a CASE learn or anti-theft relearn) to sync the new ECM with your vehicle’s keys. This process typically takes about 10-15 minutes and can be done in your driveway with no special tools. We include instructions for this procedure with your order.
Will this fix my specific problem?
This programmed ECM will correct any issue directly caused by a faulty engine computer. While the symptoms listed are very common for ECM failure, we always recommend having a professional diagnosis performed to rule out other potential issues like wiring faults or failed sensors.
Is this a genuine GM part?
This is a high-quality replacement part that is programmed with official GM software. It is designed to meet or exceed original equipment specifications for performance and reliability.