Programmed 2017 Escalade Engine Control Module 12674052

Restore Your Vehicle’s Brain and Get Back on the Road

Is your Cadillac Escalade, Chevy Tahoe, or GMC Sierra acting erratically? A failing Engine Control Module (ECM) is often the culprit behind a frustrating range of issues, from a persistent check engine light to a vehicle that won’t start at all. As the central computer, the ECM manages everything from fuel mixture and ignition timing to transmission shifting. When it fails, the entire vehicle suffers. This isn’t just an inconvenience; it’s a critical failure that compromises performance, fuel economy, and reliability. This listing is for a direct-replacement ECM, part number 12674052, that arrives at your door programmed with the latest GM software for your specific vehicle.

A Technician’s Notebook: The Intermittent No-Start Nightmare

I once had a 2017 Silverado in my bay that was giving the owner fits. It would start perfectly for a week, then refuse to crank for two days, showing a slew of communication error codes (like the dreaded U0100). We checked the battery, starter, and wiring harnesses—all were fine. The issue was intermittent and impossible to replicate on demand. After hooking up a scope, we saw the data signal from the ECM was dropping out randomly. The internal processors were failing under certain temperature conditions. We replaced it with a VIN-programmed module just like this one, performed the security relearn, and the truck has been running flawlessly ever since. These symptoms can be maddening, but a quality replacement ECM is often the definitive fix.

Is Your Vehicle Exhibiting These ECM Failure Signs?

A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, a failing ECM could be the root cause. In my 20+ years of diagnostics, these are the most common indicators I’ve seen:

✔ Vehicle will not start or has intermittent starting problems.
✔ Check Engine Light is illuminated with codes like P0601, P0606, or U0100.
✔ Poor engine performance, including misfires, hesitation, or stalling.
✔ Noticeable decrease in fuel efficiency.
✔ Automatic transmission shifting issues or harsh shifts.
✔ Problems with other electronic systems due to communication loss with the ECM.

The Power of VIN-Specific Programming

Don’t waste time and money buying a blank module that requires a trip to the dealership for expensive programming. We handle the critical first step for you. Simply provide us with your vehicle’s 17-digit VIN during checkout, and our technicians will flash this 2017 Escalade Engine Control Module with the correct, factory-updated software calibration for your exact vehicle. This ensures all factory systems, from the engine to the transmission, operate precisely as the manufacturer intended.

A Straightforward Guide to Installation

For the confident DIYer or professional technician, installing this ECM is a manageable job. However, please read carefully: post-installation procedures are required.

Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
Locate the ECM: On most compatible trucks and SUVs (like the Tahoe, Yukon, Sierra, and Silverado), the ECM is located in the engine compartment on the driver’s side. On other models like the Corvette, it may be under the dash. Consult a service manual for your specific vehicle.
Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that must be released. Then, unbolt the old module from its mounting bracket.
Install the New Module: Bolt the new ECM into place and securely reconnect all electrical connectors. Ensure they click into place.
Reconnect Battery: Reattach the negative battery terminal.
CRITICAL – Security Relearn: You must perform a Vehicle Theft Deterrent System (VTDS) relearn. If this step is not completed, your vehicle will not start. This procedure requires access to the official GM programming system (such as Tis2web or Techline Connect). This is the responsibility of the installer.
Additional Relearns: Depending on your vehicle, other procedures like a Crankshaft Position Variation Relearn or injector flow rate programming may be necessary to ensure optimal performance and clear any related trouble codes.

Will This Fit My Vehicle?

This module is a direct replacement for part number 12674052 and interchanges with several other GM part numbers, including 12692068, 12704476, 12686382, 12674472, and 12678815. It is verified 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 & Suburban 1500
2016-2018 Chevrolet Silverado 1500 (check IDs for 16/18)
2017 GMC Yukon & Yukon XL 1500
2016-2018 GMC Sierra 1500 & Sierra Denali 1500 (check IDs for 16/18)