Is Your GM Vehicle Running Rough? It Could Be The ECM.
The Engine Control Module (ECM), often called the engine computer, is the central brain of your vehicle’s powertrain. It controls everything from fuel injection and ignition timing to transmission shift points and emissions systems. When it begins to fail, it can cause a wide range of confusing and frustrating problems that can be difficult to diagnose. If your Cadillac, Chevy, or GMC is experiencing erratic behavior, a faulty ECM might be the culprit. This replacement Engine Control Module, part number 12692068, is the definitive solution to restore your vehicle’s performance and reliability.
Common Symptoms of a Failing Engine Control Module
- ✔ Persistent Check Engine Light (CEL) that won’t clear, or comes back immediately.
- ✔ Vehicle refuses to start or is very difficult to start (no-crank or crank-no-start).
- ✔ Noticeable drop in fuel economy for no apparent reason.
- ✔ Engine stalling, stuttering, or misfiring while driving.
- ✔ Rough or inconsistent idling.
- ✔ Automatic transmission shifting harshly or at the wrong times.
- ✔ Loss of communication with the module when using a diagnostic scan tool.
The Simple, Reliable Solution: A VIN-Programmed Module
Don’t waste time and money at the dealership. We make the replacement process straightforward. When you purchase this module, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then program the unit with the latest, most stable software updates directly from GM, ensuring it is perfectly matched to your vehicle’s specific configuration. This critical step ensures compatibility and proper function of all related systems right out of the box.
Installation and Required Procedures for your 2017 XTS Engine Module
Once you receive your pre-programmed module, the physical installation is typically simple. You’ll disconnect the battery, locate and unplug the old ECM, and install the new one. However, the process is not complete until a few key electronic ‘handshakes’ are performed. This is a standard procedure for modern vehicles to ensure security and performance.
IMPORTANT: Upon installation, a Vehicle Theft Deterrent System Relearn (also known as VATS or Passlock) MUST be performed. This security procedure syncs the new ECM with your vehicle’s ignition key and anti-theft system. Without this step, your vehicle will not start. This procedure requires a professional scan tool with GM programming capabilities, such as the dealership’s Tis2web or Techline Connect system. Other procedures, like a Crankshaft Variation Relearn or injector flow rate programming, may also be necessary depending on your specific vehicle. These relearn procedures are the responsibility of the installer.
Broad Compatibility Across the GM Lineup
This engine control module is a direct replacement for multiple part numbers, including 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815. It fits a wide variety of popular GM cars, trucks, and SUVs from 2016-2018, such as the Cadillac Escalade, XTS, CTS, ATS; Chevrolet Tahoe, Suburban, Silverado 1500, Corvette; and GMC Sierra 1500 & Yukon models. Please verify the part number and check the detailed fitment list to ensure it is correct for your vehicle.
Frequently Asked Questions
Is this module fully plug-and-play?
It is pre-programmed to your VIN, which handles the complex software side. However, you MUST perform the Vehicle Theft Deterrent System relearn after installation for the vehicle to start. This is a standard security step for all modern GM vehicles.
Where do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
Do I need to send you my old ECM?
No, there is no core charge or need to send in your old part. This is a direct replacement unit that we program and ship to you.
What tools are needed for the theft relearn?
The theft relearn procedure requires a professional-grade diagnostic tool with access to GM’s programming software, such as Tis2web or Techline Connect. Most professional repair shops and all GM dealerships have this capability.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty ECM, this part will be the correct fix. However, it is essential to have your vehicle properly diagnosed to rule out other potential issues like faulty sensors or wiring.