Restore Peak Performance to Your GM Vehicle
Is your 2017 Cadillac Escalade ESV, Chevy Tahoe, or GMC Sierra running rough, stalling, or displaying a persistent check engine light? These are classic signs of a failing Engine Control Module (ECM), the central computer responsible for managing your vehicle’s engine performance, fuel efficiency, and emissions. A faulty ECM can lead to a cascade of frustrating and difficult-to-diagnose issues. This direct-replacement Engine Control Module, part number 12674472, is the definitive solution to restore your vehicle’s factory operation and get you back on the road with confidence.
We take the guesswork out of the repair process. Unlike a generic module from a parts store, this ECM is specifically programmed to your vehicle’s unique Vehicle Identification Number (VIN) before it ships. This crucial step ensures that all factory settings, security protocols, and vehicle-specific calibrations are correctly loaded. We use the latest GM-certified software, guaranteeing that your vehicle receives all pertinent updates for optimal performance and reliability.
Diagnosing a Failing 2017 Escalade ESV Engine Control Module
A failing ECM can manifest in numerous ways, often mimicking other sensor or component failures. If you’re experiencing any of the following symptoms, your engine computer may be the culprit. Proper diagnosis is key, but these are strong indicators that your 2017 Escalade ESV Engine Control Module requires attention.
From the Diagnostic Bay
We had a 2017 Yukon Denali come into the shop with an intermittent no-start condition. The owner had already replaced the battery, alternator, and starter based on advice from various forums. The vehicle would crank but wouldn’t fire up, and there were no consistent trouble codes. After hours of chasing wires, we finally isolated the issue to the ECM. It was failing internally when it got hot, cutting communication to the fuel pump and ignition coils. The owner was frustrated he’d spent so much on other parts, but once we installed a VIN-programmed ECM and performed the security relearn, the truck started perfectly every time. It’s a classic example of how a failing ECM can send you down a rabbit hole of unnecessary repairs.
Common Symptoms of ECM Failure
- ✔ Check Engine Light: The light is on, and you may have communication-related codes (U-codes) or multiple, seemingly unrelated sensor codes.
- ✔ No-Start or Hard-Start: The engine cranks but refuses to start, or takes an unusually long time to fire up.
- ✔ Engine Stalling: The vehicle stalls unexpectedly while driving or idling for no apparent reason.
- ✔ Poor Performance & Fuel Economy: A noticeable drop in power, acceleration, and a significant increase in fuel consumption.
- ✔ Erratic Shifting: The transmission may shift harshly, late, or seem to hunt for the right gear, as the ECM plays a key role in transmission communication.
- ✔ Intermittent Electrical Issues: Problems that come and go with temperature changes or vehicle vibration can often be traced back to a failing computer.
Simple Ordering and Installation Process
Our goal is to make this repair as straightforward as possible. After placing your order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will then program this module with the correct, up-to-date GM software specific to your vehicle. This ensures a seamless integration with your vehicle’s existing systems.
Important Installation Note: While the physical installation is often a simple bolt-in process, a final step is required. Upon installation, the vehicle’s anti-theft system must be synchronized with the new ECM. This is known as a “Vehicle Theft Deterrent Relearn.” This procedure requires a GM-compatible diagnostic tool (such as one using Tis2web/Techline Connect). This is a standard procedure for this type of repair and is the responsibility of the installer. Other vehicle-specific setups, like a crankshaft variation relearn or injector flow rate programming, may also be necessary to ensure perfect operation.
Wide Range of GM Compatibility
This module is a direct replacement for multiple part numbers, including 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815. It fits a variety of popular GM trucks, SUVs, and cars. Please verify your part number and check the fitment list below:
- 2017 Cadillac Escalade & Escalade ESV
- 2017 Cadillac XTS (3.6L Twin Turbo)
- 2017 Cadillac CTS (6.2L Supercharged & 3.6L Twin Turbo)
- 2017 Cadillac ATS (3.6L Twin Turbo)
- 2017 Chevrolet Corvette
- 2017 Chevrolet Tahoe & Suburban 1500
- 2016-2018 Chevrolet Silverado 1500 Pickup
- 2017 GMC Yukon & Yukon XL 1500
- 2016-2018 GMC Sierra 1500 Pickup & Sierra Denali 1500
Frequently Asked Questions
Is this ECM ready to install out of the box?
This ECM is pre-programmed to your VIN, which handles the main software configuration. However, you MUST perform a Vehicle Theft Deterrent Relearn after installation for the vehicle to start. Additional relearns (like crankshaft position) may also be required depending on your vehicle.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your specific vehicle. We use it to load the exact factory software, calibrations, and security information that your vehicle was built with, ensuring perfect compatibility.
Can I perform the security relearn myself?
The security relearn procedure requires a professional-grade scan tool with access to GM’s software (like Techline Connect). It is not something that can typically be done with basic code readers or by the average DIY mechanic. We recommend having it installed by a qualified technician.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty ECM, this part will resolve the issue. It is crucial to have the vehicle properly diagnosed to confirm the ECM is the point of failure before ordering.
Does this part fit other years besides 2017?
Yes, as noted in the compatibility list, this module fits certain 2016 and 2018 Silverado and Sierra models. Always match your original part number (e.g., 12674472 or 12686382) to ensure correct fitment.