Restore Peak Performance to Your GM Vehicle
Is your 2017 Cadillac Escalade, Chevy Tahoe, or GMC Sierra running rough, throwing confusing check engine codes, or refusing to start? The Engine Control Module (ECM), often called the vehicle’s main computer, is the central command for all critical engine functions. When it fails, it can cause a cascade of frustrating and performance-robbing issues. This direct-fit Engine Control Module, part number 12678815, is the definitive solution to get your vehicle back on the road, operating exactly as it did from the factory.
Unlike generic modules that require expensive dealer visits for programming, this ECM arrives at your door fully programmed to your specific vehicle. We use your Vehicle Identification Number (VIN) to load the latest, most stable GM-certified software and calibrations. This ensures seamless communication between the engine, transmission, and all other onboard systems, restoring lost power, fuel economy, and drivability.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is on with various communication or sensor codes (e.g., U-codes, P0606).
- ✔ Engine misfires, stumbles, or stalls unexpectedly.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Transmission shifting issues or harsh engagement.
- ✔ Inconsistent or poor engine performance and hesitation.
- ✔ Other warning lights on the dashboard may illuminate intermittently.
The Critical Solution: A VIN-Programmed 2017 Escalade ECM
Replacing a modern ECM is not just a matter of swapping parts. The module must be correctly matched and programmed to your vehicle’s unique identity. Our professional programming service eliminates the guesswork and additional costs. By providing your VIN during checkout, you ensure that the 2017 Escalade ECM you receive is prepared for your specific application. It’s a precise process that accounts for your vehicle’s original options, emissions standards, and powertrain configuration, providing a reliable and lasting repair.
Installation and Setup Requirements
Please be aware that while the core engine programming is completed by us before shipment, some final setup procedures are the responsibility of the installer. This is standard for any ECM replacement on these vehicles. These may include:
- Vehicle Theft Deterrent System (VTDS) Relearn: As mentioned, this is mandatory for the vehicle to start and run.
- Crankshaft Variation Relearn (CASE Relearn): This helps the ECM detect misfires accurately. It is often required to clear certain trouble codes.
- Injector Flow Rate Programming: If applicable to your specific engine, injector codes may need to be entered.
We highly recommend professional installation by a qualified technician who has the proper equipment to complete these necessary final steps.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for part number 12678815 and is compatible with several other service numbers. It fits a wide range of GM trucks, SUVs, and performance cars. Please verify your vehicle is on the list below:
- Cadillac Escalade / ESV: 2017
- Cadillac XTS: 2017 (3.6L Twin Turbo, VIN 8)
- Cadillac CTS: 2017 (6.2L Supercharged or 3.6L Twin Turbo)
- Cadillac ATS: 2017 (3.6L, VIN Y)
- Chevrolet Tahoe: 2017
- Chevrolet Suburban 1500: 2017
- Chevrolet Silverado 1500: 2016 (ID 12674472), 2017, 2018 (ID 12686382)
- Chevrolet Corvette: 2017
- GMC Yukon / Yukon XL 1500: 2017
- GMC Sierra 1500 / Denali 1500: 2016 (ID 12674472), 2017, 2018 (ID 12686382)
Frequently Asked Questions
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 your part until we receive and validate your VIN.
Is this a plug-and-play part?
It is pre-programmed for your engine, but it is not fully plug-and-play. A mandatory Vehicle Theft Deterrent System relearn must be performed after installation for the car to start. Other minor relearns, like for the crankshaft position sensor, may also be necessary.
Can I perform the theft relearn myself?
On these newer GM vehicles, the theft relearn procedure typically requires a professional scan tool with a subscription to GM’s online service (Techline Connect). We strongly recommend having a professional automotive technician perform the installation and final setup.
What if my part number is slightly different?
This module, 12678815, also replaces part numbers 12692068, 12704476, 12686382, 12674052, and 12674472. As long as your vehicle is on our fitment list, this programmed module will work for you.
Does this ECM come with a warranty?
Yes, all our electronic modules come with a standard warranty against defects. Please refer to the warranty tab on the product page for complete details and duration.