Restore Peak Performance to Your GM Vehicle
If you’re dealing with frustrating issues like a no-start condition, a persistent Check Engine Light, erratic engine performance, or mysterious communication errors, a failing Engine Control Module (ECM) is often the culprit. As a technician with over two decades of diagnostic experience, I’ve seen firsthand how a faulty ECM can bring an otherwise healthy vehicle to a dead stop. This isn’t just a part; it’s the brain of your engine, and when it falters, everything from fuel economy to ignition timing is compromised. This replacement Engine Control Module, part number 12692068, is the definitive solution to restore your vehicle’s reliability and performance.
We take the guesswork and hassle out of the replacement process. Before we ship your part, we program it with the latest official GM software calibrations, specifically matched to your vehicle’s 17-digit VIN. This ensures that when you receive the module, it’s ready for installation and the final vehicle-side learning procedures. You’re not just buying a part; you’re getting a vital component pre-configured for your exact car or truck, saving you from expensive programming fees at a dealership.
Is Your Vehicle Showing These Symptoms?
- ✔ Engine cranks but refuses to start.
- ✔ Intermittent stalling or rough idling for no apparent reason.
- ✔ A steady or flashing Check Engine Light is illuminated on your dash.
- ✔ Diagnostic trouble codes (DTCs) related to internal processor failure, such as P0601, P0606, or P060A.
- ✔ Communication loss codes like U0100 (Lost Communication With ECM/PCM).
- ✔ Noticeable decrease in fuel efficiency and overall engine power.
- ✔ Failure to pass state emissions testing.
From the Diagnostic Bay
I remember a 2017 Sierra 1500 that came into the shop with a ghost of a problem. The owner said it would randomly fail to start, but only after it had been sitting for a few hours. No codes, no warning lights. We checked the battery, starter, and fuel pump—all perfect. After two days of chasing wires, we finally caught it in the act. The scan tool couldn’t communicate with the ECM. It turned out the main processor on the board was failing intermittently as it cooled down. Swapping in a VIN-programmed ECM like this one solved the issue in under an hour (including the security relearn). It’s a classic example of how a failing 2017 ATS Engine Control Module or its equivalent in other models can cause headaches that seem impossible to trace.
Your Straightforward Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any work on the electrical system.
- ✔ Locate the ECM: On most compatible vehicles like the Sierra, Tahoe, or ATS, the ECM is found in the engine compartment, typically on the driver’s side. On the Corvette, it’s located under the dash on the passenger side. Consult a service manual if you’re unsure.
- ✔ Disconnect and Remove: Carefully unplug the main electrical connectors. They have locking tabs that must be released. Once disconnected, unbolt the old module from its mounting bracket.
- ✔ Install the New Module: Bolt the new, pre-programmed ECM into place. Firmly reconnect the electrical harnesses, ensuring the locking tabs click securely into place.
- ✔ Reconnect Battery: Reattach the negative battery terminal.
- ✔ Perform Relearn Procedures: This is a critical final step. The vehicle will likely not start until a Vehicle Theft Deterrent (VTD) relearn is completed using a compatible scan tool with access to GM’s TIS2Web or Techline Connect service. Other procedures like a crankshaft variation relearn may also be necessary. This is the responsibility of the installer.
This 2017 ATS Engine Control Module is the correct, reliable fix for a wide range of popular GM vehicles. By providing us with your VIN, you ensure that the brain of your engine is operating on the exact software it was designed for.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815. It is confirmed to fit the following models:
- 2017 Cadillac Escalade / Escalade ESV
- 2017 Cadillac XTS (3.6L LF3 Engine)
- 2017 Cadillac CTS (6.2L Supercharged or 3.6L LF3 Twin Turbo)
- 2017 Cadillac ATS (3.6L LF4 Engine)
- 2017 Chevrolet Corvette
- 2017 Chevrolet Tahoe / Suburban 1500
- 2016-2018 Chevrolet Silverado 1500 (check ID)
- 2017 GMC Yukon / Yukon XL 1500
- 2016-2018 GMC Sierra 1500 / Sierra Denali 1500 (check ID)
Frequently Asked Questions
Frequently Asked Questions
Why do you need my vehicle’s VIN?
Your Vehicle Identification Number (VIN) allows us to load the exact, factory-specified software and calibrations for your car’s specific options and systems. This ensures the 2017 ATS Engine Control Module communicates perfectly with your vehicle, a step that is mandatory for modern vehicles.
Is this part difficult to install?
The physical installation is straightforward for a DIYer with basic tools—it’s mostly unplugging the old unit and plugging in the new one. However, the final, mandatory step is a security relearn procedure that requires professional-level scan tools like GM’s TIS2Web/Techline Connect. This is not optional; the vehicle will not run without it.
What happens if I don’t perform the theft relearn?
The vehicle’s anti-theft system will identify the new ECM as an unauthorized part and will activate security protocols, which prevents the engine from starting. This is a built-in security feature on all modern GM vehicles.
Do I need to send you my old ECM (core)?
No, there is no core charge or requirement to send your old module to us. You can recycle it locally.
Will this fix my check engine light?
If the check engine light and performance issues are caused by a faulty ECM (e.g., codes P0601, U0100), then this part is the correct solution. However, you must ensure your vehicle has been properly diagnosed, as other failing sensors or wiring issues can cause similar symptoms.