Restore Your GM Truck’s Brainpower and Performance
Is your 2017 GMC Yukon XL 1500 acting up? Experiencing frustrating issues like a no-start condition, a persistent Check Engine Light, rough idling, or sudden stalling? As a technician with over two decades of experience under the hood, I’ve seen these symptoms countless times, and they often point to one critical component: a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle, the ‘brain’ that manages everything from fuel injection and ignition timing to transmission shifting and emissions. When it falters, the entire vehicle’s performance and reliability are compromised.
This isn’t just another part; it’s a direct solution. We offer this genuine GM Engine Control Module, part number 12674052, fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This means you get a component loaded with the latest factory software from General Motors, tailored precisely for your truck or SUV. This critical step ensures seamless communication with your vehicle’s other electronic systems, restoring the performance and efficiency you expect. By providing us with your VIN at checkout, you bypass the expensive trip to the dealership for programming, saving you time, money, and the headache of a tow bill.
From the Diagnostic Bay: The Ghost in the Machine
A few months back, a 2017 Sierra 1500 was towed into my shop. The owner was at his wit’s end. The truck would randomly die at stoplights, the transmission would shift erratically, and he had a cluster of seemingly unrelated warning lights. He’d already replaced the battery and alternator with no luck. After connecting my scan tool, I found a slew of communication error codes (U-codes) pointing to a network failure. The key was that all modules were losing communication with the ECM. Instead of chasing ghosts in the wiring, we inspected the ECM itself. After confirming solid power and ground, we knew the processor was failing internally. We installed a VIN-programmed ECM just like this one, performed the security and crankshaft relearn procedures, and the truck ran like new. This part solved every single phantom issue in one go.
Is Your Yukon Exhibiting These ECM Failure Signs?
A faulty ECM can manifest in various ways. If you’re experiencing any of the following, the 2017 Yukon XL Engine Control Module could be the component you need to fix the problem for good.
- ✔ Check Engine Light is illuminated with codes related to internal processor failure (e.g., P0601, P0606).
- ✔ Vehicle refuses to start or is extremely difficult to start.
- ✔ Loss of communication between modules, often triggering U-codes like U0100.
- ✔ Noticeable drop in fuel economy and poor engine performance.
- ✔ Engine stalling, sputtering, or misfiring intermittently.
- ✔ Harsh or erratic automatic transmission shifting.
Your Straightforward ECM Installation Guide
Replacing the ECM is a manageable job for a seasoned DIYer or any professional mechanic. The most critical part of the process is the post-installation electronic relearn procedures.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the ECM: On most GM trucks and SUVs like the Yukon, the ECM is found in the engine compartment, typically on the driver’s side near the firewall or fender.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed ECM into place. Reconnect the wiring harnesses, ensuring they click securely into position.
- Reconnect Battery: Reattach the negative battery terminal.
- CRITICAL – Perform Relearn Procedures: This is a non-negotiable step. The vehicle will likely not start until a Vehicle Theft Deterrent (VTD) relearn is performed using a GM-compatible scan tool with access to TIS2Web or Techline Connect. Other procedures, such as a Crankshaft Position Variation relearn, may also be necessary for optimal performance. This is the responsibility of the installer.
Verified Fitment for Your GM Vehicle
This module, part number 12674052, is a direct replacement for several other part numbers and fits a wide range of General Motors vehicles. Please verify your vehicle is on this list. This is the correct 2017 Yukon XL Engine Control Module and also fits:
- Cadillac Escalade / ESV (2017)
- Cadillac XTS (2017) – 3.6L Twin-Turbo (VIN 8, LF3)
- Cadillac CTS (2017) – 6.2L Supercharged or 3.6L Twin-Turbo (VIN 8, LF3)
- Cadillac ATS (2017) – 3.6L (VIN Y, LF4)
- Chevrolet Corvette (2017)
- Chevrolet Tahoe (2017)
- Chevrolet Suburban 1500 (2017)
- Chevrolet Silverado 1500 (2016-2018) – Check specific IDs 12674472 or 12686382 for 2016/2018 models.
- GMC Yukon (2017)
- GMC Yukon XL 1500 (2017)
- GMC Sierra 1500 / Denali 1500 (2016-2018) – Check specific IDs 12674472 or 12686382 for 2016/2018 models.
Note: This module is also a direct replacement for part numbers: 12692068, 12704476, 12686382, 12674472, and 12678815.
Frequently Asked Questions
Frequently Asked Questions
Why do you need my VIN to program the ECM?
Your VIN is essential because it allows us to load the exact, correct software calibration from GM for your vehicle’s specific engine, transmission, and options. This ensures the 2017 Yukon XL Engine Control Module works perfectly out of the box after the necessary relearn procedures are completed.
What is a ‘theft relearn’ and can I do it myself?
The Vehicle Theft Deterrent (VTD) relearn is a security procedure that syncs the new ECM to your vehicle’s ignition keys and anti-theft system. If this is not done, the vehicle will not start. It requires a professional-grade scan tool with a subscription to GM’s TIS2Web/Techline Connect software. Most DIYers will need to have a qualified mechanic or mobile technician perform this step.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original ECM (e.g., codes P0601, P0606), then yes, this part is the correct fix. However, it’s crucial to properly diagnose the vehicle first, as other faulty sensors or wiring issues can also cause a check engine light.
Is this a plug-and-play part?
It is ‘plug-in’ ready, but not fully ‘play’ ready. The physical installation is straightforward, but the mandatory electronic relearn procedures (Theft, Crankshaft Variation, etc.) must be completed with the proper tools for the vehicle to function correctly. We handle the difficult programming part; the final on-vehicle setup is the responsibility of the installer.
What if my part number is slightly different but my vehicle is on the list?
This module (12674052) is a direct replacement for several other GM part numbers, including 12692068, 12704476, 12686382, 12674472, and 12678815. If your original module has one of these numbers, this part is a compatible replacement.