Restore Peak Performance to Your 2017 GMC Yukon XL
Is your 2017 Yukon XL suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition? These are common indicators of a failing Engine Control Module (ECM). As the central computer of your vehicle, the ECM is responsible for managing critical engine functions, including fuel delivery, ignition timing, and emissions control. When it falters, the reliability and drivability of your truck are compromised. This replacement Engine Control Module, part number 12678815, is the definitive solution to get your vehicle back to factory-spec operation.
The Plug-and-Play Solution: VIN-Programmed for Your Truck
Don’t settle for a generic, unprogrammed module that will require expensive trips to the dealership. We simplify the repair process. Upon purchase, you provide us with your vehicle’s 17-digit VIN. Our technicians will then flash this module with the latest, most stable software updates directly from General Motors, ensuring it is perfectly matched to your Yukon XL’s specific configuration. This critical step eliminates compatibility guesswork and ensures all systems communicate correctly from the moment of installation.
Expert Pro Tip
Expert Pro Tip
Before installing your new ECM, disconnect the vehicle’s battery for at least 15 minutes. This clears any residual memory from the old module and allows the vehicle’s other systems to properly recognize the new, correctly programmed ECM upon reconnection. This simple step can prevent a host of communication errors.
Common Symptoms of a Failing 2017 Yukon XL ECM
A faulty engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, your ECM is a likely culprit:
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough or erratic engine idle.
- ✔ Hesitation or stumbling during acceleration.
- ✔ Communication errors when using a diagnostic scan tool.
Important Installation Information: Theft Deterrent Relearn
As a vital security measure, modern GM vehicles link the ECM to the ignition and security systems. After installing your new module, the vehicle will not start until a “Vehicle Theft Deterrent Relearn” procedure is completed. This is a standard process that pairs the new ECM to your vehicle’s keys and anti-theft system.
Please Note: This procedure requires a professional scan tool with GM programming capabilities, such as those using Tis2web or Techline Connect. This is the responsibility of the installer. Other potential relearns, like crankshaft position variation or injector flow rate programming, may also be necessary depending on your vehicle’s specific condition and trouble codes.
This module is a direct replacement for multiple part numbers, including: 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815. By ordering this VIN-programmed 2017 Yukon XL ECM, you are ensuring a reliable and accurate repair for your vehicle.
Frequently Asked Questions
Expert Pro Tip
Before installing your new ECM, disconnect the vehicle’s battery for at least 15 minutes. This clears any residual memory from the old module and allows the vehicle’s other systems to properly recognize the new, correctly programmed ECM upon reconnection. This simple step can prevent a host of communication errors.