Programmed 2015-2016 Yukon XL ECM 12676230 | VIN Flashed Engine Computer

Restore Your Yukon’s Brain and Get Back on the Road with Confidence

Is your 2015-2016 GMC Yukon XL 1500 giving you headaches? If you’re dealing with a persistent Check Engine Light, rough idling, stalling, or other baffling engine performance problems, a failing Engine Control Module (ECM) is often the culprit. As the central computer for your engine, when the ECM starts to fail, it can cause a cascade of frustrating and seemingly unrelated issues. I’ve seen it countless times in my 20+ years in the shop: a perfectly good engine held hostage by a faulty computer. This isn’t just an annoyance; it affects your vehicle’s reliability, fuel economy, and safety.

This isn’t just a replacement part; it’s a complete solution. We offer a genuine OEM Engine Control Module, part number 12676230, that comes professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the module communicates perfectly with your Yukon’s existing systems—the transmission, the anti-lock brakes, the security system, and more. By flashing it with the latest GM-certified software updates before it even ships, we eliminate the need for an expensive trip to the dealership for programming. You get a reliable, ready-to-install part that restores your vehicle to its factory-specified performance.

Is Your Yukon Exhibiting These Warning Signs?

A failing ECM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution:

• ✔ Unexplained Check Engine Light (CEL) illumination
• ✔ Stalling, stumbling, or hesitation during acceleration
• ✔ Engine cranks but refuses to start (no-start condition)
• ✔ Noticeable decrease in fuel efficiency
• ✔ Rough or erratic idle
• ✔ Communication error codes, such as P0601 (Internal Control Module Memory Check Sum Error), P0606 (ECM/PCM Processor Fault), or U0100 (Lost Communication With ECM/PCM)
• ✔ Failure to pass state emissions testing

Your Straightforward ECM Installation Guide

Installing your pre-programmed 2015-2016 Yukon XL ECM is a manageable job for a confident DIYer. While we handle the complex software programming, you’ll need to perform a simple security relearn procedure after installation. Always consult a vehicle-specific service manual for detailed diagrams.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
2. Locate the ECM: On most 2015-2016 GM trucks and SUVs like the Yukon XL, the ECM is located in the engine compartment on the driver’s side (LH side), near the firewall or inner fender.
3. Disconnect the Connectors: Carefully release the locking tabs on the electrical wiring harness connectors and pull them straight out from the module. Inspect connectors for any corrosion or damage.
4. Remove the Old Module: Unbolt the old ECM from its mounting bracket. There are typically a few bolts holding it in place.
5. Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the bolts. Reconnect the wiring harnesses, ensuring they click securely into place.
6. Reconnect the Battery: Reattach the negative battery terminal.
7. Perform Security Relearn: This is a crucial step. You will need to perform a “Security Relearn” or “Key Relearn” procedure. A common method is the “10-Minute Relearn,” which involves turning the key to the ‘ON’ position for 10 minutes, then off, and repeating two more times. This allows the new ECM to recognize your vehicle’s anti-theft system. Your vehicle will not start until this is completed.

Verified Fitment for Your GM Vehicle

This module is a direct replacement for a wide range of General Motors vehicles. It is compatible with multiple part numbers, including 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318. Please verify your part number or confirm fitment with the list below: