Restore Peak Performance to Your GM Vehicle
Is your Corvette, Sierra, or Escalade suffering from frustrating issues like intermittent stalling, a persistent check engine light, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer of your vehicle. As a technician with over two decades of experience, I’ve seen firsthand how a faulty ECM can cripple even the most powerful vehicles. This isn’t just an inconvenience; it affects performance, fuel economy, and reliability. This replacement 2017 Corvette Engine Control Module is the definitive solution to get your vehicle running like new again.
We take the guesswork out of the repair. Unlike a generic part from a salvage yard, this module arrives at your door pre-programmed with the latest GM factory software, specifically matched to your vehicle’s VIN. This critical step ensures all factory-calibrated settings for your engine and transmission are correct from the moment of installation, saving you a costly trip to the dealership for initial programming.
Common Signs of a Failing Engine Computer
- ✔ Check Engine Light is on with communication-related codes (e.g., P0601, P0606, U0100).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency.
- ✔ The vehicle experiences random stalling or hesitation during acceleration.
- ✔ Erratic transmission shifting or performance issues.
- ✔ Communication problems with diagnostic scan tools.
A Technician’s Notebook: The Intermittent No-Start Mystery
A customer brought in a 2017 Sierra 1500 with a perplexing issue: it would randomly refuse to start. No crank, no click, nothing. Then, an hour later, it would fire up perfectly. He’d already replaced the battery and starter to no avail. After connecting my scan tool, I noticed intermittent communication loss with the ECM. On these modern GM trucks, the ECM is exposed to heat and vibration in the engine bay. Over time, internal solder joints can develop micro-fractures, leading to the exact kind of temperature-sensitive, intermittent failure he was experiencing. Replacing the ECM with a pre-programmed unit like this one solved the problem permanently. It’s a repair I’ve done countless times, and it highlights why a reliable ECM is non-negotiable.
Your Straightforward Installation Guide
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate the ECM: On the 2017 Corvette, it’s found on the passenger’s side cowl area, under the dash. For trucks and SUVs like the Sierra or Tahoe, it’s typically on the driver’s side front of the engine compartment. Always confirm the location for your specific model.
- ✔ Disconnect and Remove: Carefully unplug the wiring harness connectors. Be gentle with the locking tabs. Then, unbolt the module from its mounting bracket and remove the old unit.
- ✔ Install the New Module: Seat the new ECM into the mounting bracket and secure it with the bolts. Reconnect the wiring harnesses, ensuring they click securely into place.
- ✔ Reconnect Battery: Re-attach the negative battery terminal.
- ✔ Perform Security Relearn: This is a critical final step. If the vehicle does not start, you must perform a Vehicle Theft Deterrent (VTD) relearn using a compatible GM diagnostic tool (like TIS2Web or Techline Connect). This syncs the new ECM with your vehicle’s anti-theft system. Other procedures like a crankshaft variation relearn may also be required.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12674052 and is interchangeable with part numbers 12692068, 12704476, 12686382, 12674472, and 12678815. It is confirmed to fit the following vehicles:
- 2017 Cadillac Escalade / Escalade ESV
- 2017 Cadillac XTS (3.6L Twin Turbo, VIN 8, LF3)
- 2017 Cadillac CTS (6.2L Supercharged or 3.6L Twin Turbo)
- 2017 Cadillac ATS (3.6L, VIN Y, LF4)
- 2017 Chevrolet Corvette (RH cowl under dash)
- 2017 Chevrolet Tahoe / Suburban 1500
- 2016-2018 Chevrolet Silverado 1500 Pickup (Check ID)
- 2017 GMC Yukon / Yukon XL 1500
- 2016-2018 GMC Sierra 1500 Pickup / Sierra Denali 1500 (Check ID)
Frequently Asked Questions
Do I need to send my old ECM in?
No core charge or return is required. This is an outright purchase, simplifying the process for you.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship the module until we have this information to perform the programming service.
What tools are needed for the Theft Relearn procedure?
The Vehicle Theft Deterrent (VTD) relearn requires a professional-grade scan tool with access to GM’s TIS2Web or Techline Connect software. This is typically performed by a qualified mechanic or a well-equipped DIYer with the proper subscription and interface.
Is this a simple plug-and-play part?
It is plug-and-program. The module is programmed to your VIN before shipping, which handles the complex software setup. However, the final on-vehicle security relearn is required for the vehicle to start and run. This is standard procedure for any ECM replacement on these models.
Will this fix my specific problem?
This part corrects issues directly caused by a faulty ECM, such as the symptoms listed above. It’s essential to have a proper diagnosis to confirm the ECM is the root cause before ordering. A faulty sensor or wiring issue can sometimes mimic ECM failure.
What if my original part number is not 12674052?
Please check the list of interchangeable part numbers provided. This module directly replaces several part numbers, including 12692068, 12704476, 12686382, and others. If your number is on that list, this part will work for your application.