Restore Peak Performance to Your GM Truck or SUV
Is your 2017 GMC Yukon XL 1500 suffering from baffling issues like a no-start condition, erratic idling, or a persistent Check Engine Light that won’t go away? You’re not just dealing with an annoyance; you’re facing a potential failure of the vehicle’s central command center: the Engine Control Module (ECM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty ECM can cripple an otherwise perfectly good vehicle, causing immense frustration. This isn’t just a part; it’s the solution to getting your reliable truck back.
This isn’t a generic, off-the-shelf computer. We provide a genuine GM ECM, part number 12674472, that is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ever leaves our facility. This critical step ensures all factory settings and the very latest GM software calibrations are loaded, giving your engine the precise instructions it needs to run efficiently and powerfully. This saves you a costly trip to the dealership for initial programming.
Case Study: A Tricky Diagnosis
A customer brought in a 2017 Sierra 1500 with an intermittent no-start and a U0100 Lost Communication code. They had already replaced the battery and checked all the main fuses. In the shop, we could see the ECM would randomly drop offline. After hooking up a scope, we confirmed the power and ground feeds to the module were solid. The issue wasn’t the wiring; it was the ECM’s internal processor failing under certain temperature conditions. Swapping in a VIN-programmed ECM like this one, followed by a quick theft deterrent relearn, resolved the issue completely. It’s a classic example of how a failing computer can mimic other problems.
Is Your GM Vehicle Showing These Signs?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Vehicle will not start or has intermittent starting issues.
- ✔ Persistent Check Engine Light (CEL) with no clear cause.
- ✔ Diagnostic Trouble Codes (DTCs) related to internal module failure, such as P0601, P0602, or P0606.
- ✔ Communication error codes like U0100 (Lost Communication With ECM/PCM).
- ✔ Poor fuel economy and noticeable loss of engine power.
- ✔ Harsh or incorrect shifting from the transmission.
- ✔ Stalling or rough idling for no apparent reason.
Your Straightforward Installation Guide
While this is a direct-fit part, proper installation procedure is key. This job is manageable for a seasoned DIYer or any professional technician.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning work.
- Locate the ECM: On most compatible trucks and SUVs (like the Yukon, Tahoe, Sierra, Silverado), the ECM is located in the engine compartment on the driver’s side, near the firewall or inner fender.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that must be released. Once disconnected, unbolt the old ECM from its mounting bracket.
- Install the New ECM: Mount the new module securely in place and reconnect the electrical harnesses. Ensure they click firmly into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Relearn Procedures: This is the most important step. The vehicle will likely not start until a Vehicle Theft Deterrent Relearn is performed using a GM-compatible scan tool with access to Tis2web or Techline Connect. Other procedures, like a Crankshaft Position Variation Relearn, may also be required for optimal performance. This is the responsibility of the installer.
Verified Vehicle Compatibility
This ECM is a direct replacement for part number 12674472 and is interchangeable with part numbers 12692068, 12704476, 12686382, 12674052, and 12678815. It fits a wide range of GM vehicles, including:
- Cadillac Escalade / ESV: 2017
- Cadillac ATS / CTS / XTS: 2017 (specific engines)
- Chevrolet Corvette: 2017 (6.2L)
- Chevrolet Silverado 1500: 2016, 2017, 2018
- Chevrolet Suburban 1500: 2017
- Chevrolet Tahoe: 2017
- GMC Sierra 1500 / Denali 1500: 2016, 2017, 2018
- GMC Yukon / Yukon XL 1500: 2017
Please ensure your vehicle is on this list and provide your VIN upon checkout for programming.
Frequently Asked Questions
What exactly is VIN programming?
VIN programming is the process of loading your vehicle’s unique 17-digit Vehicle Identification Number and its corresponding factory software into the ECM. This ensures the module communicates correctly with all other systems in your specific vehicle, from the engine to the transmission and anti-lock brakes.
Do I have to do anything after installing this part?
Yes. After installation, you or your mechanic MUST perform a Vehicle Theft Deterrent System (VTDS) relearn using a professional tool like GM’s Tis2web/Techline Connect. The vehicle will not start without this step. Other relearns (crankshaft variation, etc.) may also be necessary.
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 will resolve the issue. However, if the light is on for another reason, like a bad sensor, that issue will still need to be addressed separately.
Where is the ECM located on my 2017 Yukon XL?
On the 2017 GMC Yukon XL 1500, the ECM is found in the engine bay, typically mounted on the left-hand (driver’s side) inner fender or near the firewall.
What if my original part number is slightly different but on the list?
This ECM is a direct, interchangeable replacement for all part numbers listed (12692068, 12704476, etc.). As long as your original part number is on our list, this module will function correctly once programmed to your VIN.