Programmed 2017 Tahoe Engine Control Module ECM 12674052

Restore Your Truck’s Performance and Reliability

If you’re dealing with frustrating, hard-to-diagnose issues on your 2017 Chevrolet Tahoe, the Engine Control Module (ECM) is often the culprit. As the central computer for your engine, a failing ECM can cause everything from a simple check engine light to a no-start condition that leaves you stranded. I’ve spent two decades under the hood, and I’ve seen firsthand how a faulty module can mimic a dozen other problems. This isn’t just a replacement part; it’s a direct-fit, VIN-programmed solution designed to restore your vehicle’s factory performance and get you back on the road with confidence.

We take the guesswork out of the equation. Before we ship, we program this 2017 Tahoe Engine Control Module with the latest GM software calibrations specific to your vehicle’s VIN. This ensures proper communication between all your vehicle’s systems, from the transmission to the fuel injectors, for optimal efficiency and power delivery.

From the Diagnostic Bay: The Intermittent Stall Case

A customer brought in a 2017 Yukon with an issue that was driving him crazy. It would stall intermittently at stoplights, but never threw a consistent code. He’d already replaced the fuel pump and a few sensors with no luck. After hooking up my scan tool and monitoring live data, I noticed the ECM’s internal processor was occasionally dropping communication for a split second—not long enough to set a hard fault every time, but just enough to kill the engine. We installed a VIN-programmed ECM, performed the necessary security relearn, and the problem was solved for good. It’s a classic example of how a failing 2017 Tahoe Engine Control Module can present as something else entirely.

Is Your GM Vehicle Showing These ECM Failure Signs?

✔ Check Engine Light is on with codes like P0601, P0606 (Internal Control Module Processor Error), or various U-codes (Communication Errors).
✔ The engine cranks but refuses to start.
✔ Unexplained drops in fuel economy.
✔ The vehicle stalls unexpectedly while driving or at idle.
✔ Harsh or erratic automatic transmission shifting.
✔ Misfires or rough running even after replacing plugs and coils.
✔ The cooling fans run constantly, even when the engine is cold.

Your Step-by-Step ECM Installation Guide

✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
✔ Locate the ECM: On the 2017 Tahoe and similar trucks/SUVs, the ECM is typically found in the left-hand (driver’s side) front of the engine compartment.
✔ Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
✔ Install the New Module: Bolt your new, VIN-programmed ECM into place. Securely reconnect the wiring harnesses, making sure they click and lock into position.
✔ Reconnect Battery: Reattach the negative battery terminal.
✔ CRITICAL – Perform Relearns: This is the most important step. The vehicle will likely not start until a Vehicle Theft Deterrent (VATS/Passlock) relearn is completed using a professional GM-capable scan tool or software like TIS2Web/Techline Connect. Other procedures like a Crankshaft Variation Relearn may also be necessary.

An Important Notice for DIY and Professional Installers

While we provide a module programmed with the correct GM calibrations for your VIN, the final integration into your vehicle is a critical step. The installer is responsible for performing the required security relearn procedures. This is a standard security feature on all modern GM vehicles to prevent theft. Failure to perform the VATS relearn will result in a no-start condition. Additional setups, such as for fuel injectors or other components, may also be required depending on your specific vehicle configuration.

Verified Fitment For These GM Models

This module, part number 12674052, is a direct replacement for several part numbers including 12692068, 12704476, 12686382, 12674472, and 12678815. It is confirmed to fit the following vehicles:

2017 Cadillac Escalade / Escalade ESV
2017 Cadillac XTS (3.6L Twin Turbo, VIN 8)
2017 Cadillac CTS (6.2L Supercharged or 3.6L Twin Turbo)
2017 Cadillac ATS (3.6L, VIN Y)
2017 Chevrolet Corvette
2017 Chevrolet Tahoe
2017 Chevrolet Suburban 1500
2016-2018 Chevrolet Silverado 1500 Pickup (check IDs for 16/18)
2017 GMC Yukon / Yukon XL 1500
2016-2018 GMC Sierra 1500 Pickup (check IDs for 16/18)
2017-2018 GMC Sierra Denali 1500 (check IDs for 18)