Restore Peak Performance to Your GM Vehicle
Is your Cadillac, Chevy, or GMC truck acting up? Unexplained stalling, a persistent Check Engine Light, or erratic engine behavior can often point to one critical component: a failing Engine Control Module (ECM). As the ‘brain’ of your vehicle’s engine, the ECM governs everything from fuel mixture and ignition timing to transmission shifts. When it falters, the entire vehicle suffers. I’ve spent over two decades diagnosing these exact issues, and a faulty ECM is a common culprit for problems that seem impossible to pin down.
This isn’t just a replacement part; it’s a direct solution. We provide a genuine GM Engine Control Module, part number 12692068, professionally programmed with the latest GM software updates specifically for your vehicle’s VIN. This means you skip the expensive and time-consuming trip to the dealership for programming. You get a component that’s ready for installation, designed to restore the precise, reliable performance you expect from your vehicle.
Common Signs of a Failing ECM
- ✔ Check Engine Light is illuminated, often with communication error codes like U0100 or internal processor fault codes like P0601, P0606.
- ✔ Vehicle experiences intermittent or random stalling for no apparent reason.
- ✔ Noticeable decrease in fuel economy.
- ✔ Engine misfires, runs rough, or hesitates during acceleration.
- ✔ The vehicle enters ‘limp mode’ with reduced power.
- ✔ Automatic transmission shifts harshly or at the wrong times.
- ✔ Complete no-start condition where the engine cranks but won’t fire up.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2017 Sierra 1500 that came into my bay with a complaint of random stalling. The owner had already replaced the fuel pump and a handful of sensors. No codes were stored. On a test drive, it ran perfectly for 20 minutes, then just died at a stoplight. After letting it sit, it started right back up. These intermittent, heat-related failures are classic signs of an internal ECM problem. The solder joints on the circuit board expand and contract, causing a momentary loss of connection. We swapped in a VIN-programmed ECM, performed the necessary relearns, and the truck never had the issue again. It saved the customer from endless guesswork and costly parts swapping.
A Straightforward Guide to Installation
Replacing your 2017 CTS Engine Control Module is a manageable job for a confident DIYer or any professional mechanic. Following these steps will ensure a smooth process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On most listed vehicles (like the Sierra, Tahoe, Escalade), the ECM is found in the engine compartment, typically on the driver’s side. On the Corvette, it’s under the dash on the passenger side. Refer to your vehicle’s service manual for the exact location.
- Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harness connectors from the old ECM. Inspect them for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install the New ECM: Mount your new, pre-programmed ECM in place and securely tighten the bolts. Reconnect the wiring harnesses, ensuring they click firmly 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 Security/Theft Deterrent Relearn is performed using a compatible scan tool with access to GM’s TIS2WEB or Techline Connect service. Other procedures like a Crankshaft Position Variation Relearn may also be necessary. This is the responsibility of the installer.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815. It is guaranteed to fit the following models and configurations. Please verify your vehicle and options before ordering.
- Cadillac ATS: 2017 (3.6L, VIN Y, LF4)
- Cadillac CTS: 2017 (6.2L Supercharged & 3.6L Twin Turbo VIN 8, LF3)
- Cadillac Escalade / ESV: 2017
- Cadillac XTS: 2017 (3.6L, VIN 8, LF3)
- Chevrolet Corvette: 2017
- Chevrolet Silverado 1500: 2016 (ID 12674472), 2017, 2018 (ID 12686382)
- Chevrolet Suburban 1500: 2017
- Chevrolet Tahoe: 2017
- GMC Sierra 1500 / Denali 1500: 2016 (ID 12674472), 2017, 2018 (ID 12686382)
- GMC Yukon / Yukon XL 1500: 2017
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential. We use it to load the exact, correct GM-certified software and calibrations for your specific vehicle’s engine, transmission, and options. This ensures proper function and compatibility right out of the box.
What is a ‘theft relearn’ and can I do it myself?
The theft relearn procedure syncs the new ECM with your vehicle’s anti-theft and ignition key system. Without it, the vehicle will not start. This procedure requires a professional-grade scan tool with access to GM’s online service (TIS2WEB/Techline Connect). Most DIY code readers cannot perform this function. It is the responsibility of the buyer or their mechanic to complete this step.
Is this part difficult to install?
The physical replacement is straightforward, involving simple hand tools to unbolt the old unit and plug in the new one. The more technical part is the post-installation electronic relearn procedures. We recommend this part for experienced DIYers or professional installation.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by an internal failure of the ECM (common codes P0601-P0606) or a related communication error, this part is the correct fix. However, you should always perform a complete vehicle diagnosis to ensure there aren’t other faulty sensors or wiring issues causing your problems.