Restore Your Vehicle’s Performance and Reliability
Is your Cadillac, Chevy, or GMC truck acting erratically? Experiencing frustrating no-start conditions, stalling, or a persistent Check Engine Light? As a technician with over two decades of experience, I’ve seen firsthand how a failing Engine Control Module (ECM) can cause a host of baffling issues. The ECM is the brain of your engine, managing everything from fuel mixture and ignition timing to transmission shifts. When it falters, your vehicle’s performance and dependability suffer. This isn’t just an inconvenience; it can be a serious safety concern.
This listing is for a direct-replacement Engine Control Module, part number 12692068, which is the solution to these complex problems. We take the biggest hassle out of the repair process: programming. Simply provide us with your vehicle’s VIN during checkout, and our experts will flash this module with the latest, most stable software updates directly from GM. This ensures it arrives at your door ready for installation and configured specifically for your vehicle’s systems, saving you a costly trip to the dealership.
Case Study: A Tricky Diagnosis
I remember a 2017 Sierra 1500 that came into the shop with a complaint of intermittent stalling at stoplights and a random no-start that would resolve itself after a few minutes. The customer had already replaced the battery and alternator. We scanned it and found no hard codes, just a few communication loss histories. After hours of chasing wires and testing sensors, we decided to monitor the ECM’s internal voltage and temperature data. We noticed that just before a stall, the ECM’s internal processor temperature would spike erratically. We swapped in a known-good, pre-programmed ECM like this one. The stalling vanished, and the truck ran perfectly. It’s a classic example of how an internal ECM fault can mimic other issues, and why a reliable, correctly programmed module is the key to an accurate and lasting repair.
Is Your Vehicle Showing These ECM Failure Signs?
- ✔ Engine stalling or misfiring for no apparent reason.
- ✔ Complete no-start condition where the engine cranks but won’t fire up.
- ✔ Check Engine Light is on with codes like P0601, P0606, or other internal processor faults.
- ✔ Noticeable decrease in fuel economy.
- ✔ Poor or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Intermittent issues that get worse as the engine warms up.
Your Straightforward ECM Installation Guide
Replacing your 2017 CTS Engine Control Module is a manageable job for a confident DIYer or any professional mechanic. While the programming is done for you, the final security handshake must be completed on the vehicle.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On most listed vehicles (like the Sierra/Silverado, Tahoe/Yukon), the ECM is located in the engine compartment on the driver’s side. On the Corvette, it’s under the dash on the passenger side. Consult a service manual for your specific model’s location.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that must be released. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed ECM into place. Reconnect the electrical connectors, ensuring they click securely into place.
- Reconnect Battery: Reattach the negative battery terminal and tighten it securely.
- CRITICAL – Security Relearn: The vehicle will likely not start at this point due to the anti-theft system. You or your mechanic MUST perform a Vehicle Theft Deterrent (VTD) relearn using a compatible GM diagnostic tool (such as Tis2web/Techline Connect). This pairs the new ECM to your vehicle.
- Additional Relearns: Depending on your vehicle, other procedures like a Crankshaft Variation Relearn may be necessary to ensure optimal performance and clear any remaining codes. This is the responsibility of the installer.
Verified Fitment For These GM Vehicles
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 ATS (3.6L, VIN Y)
- 2017 Cadillac CTS (6.2L Supercharged & 3.6L Twin Turbo VIN 8)
- 2017 Cadillac Escalade & Escalade ESV
- 2017 Cadillac XTS (3.6L, VIN 8)
- 2017 Chevrolet Corvette
- 2016-2018 Chevrolet Silverado 1500
- 2017 Chevrolet Suburban 1500
- 2017 Chevrolet Tahoe
- 2016-2018 GMC Sierra 1500 & Sierra Denali 1500
- 2017 GMC Yukon & Yukon XL 1500
Please verify your part number or contact us with your VIN to ensure compatibility before ordering.
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, providing your Vehicle Identification Number (VIN) is mandatory. We use it to load the correct, vehicle-specific GM software and calibrations onto the module before shipping. This step is essential for proper function.
What is a ‘theft relearn’ and can I do it myself?
The theft relearn is a security procedure that syncs the new ECM with your vehicle’s ignition keys and anti-theft system. It requires a professional-grade scan tool with access to GM’s software (like Techline Connect). Most DIYers will need to have a qualified mechanic or locksmith perform this step after installation.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of your old ECM (e.g., code P0601), this module will resolve the issue. However, if the light is on for another reason (like a bad oxygen sensor), you will still need to diagnose and repair that separate problem.
What other part numbers does this replace?
This ECM, 12692068, is a direct, interchangeable replacement for several other GM part numbers, including 12704476, 12686382, 12674052, 12674472, and 12678815.
Is there a warranty on this part?
Yes, all our electronic modules come with a warranty covering defects in the part itself. Please see our warranty page for full details and conditions.