Restore Peak Performance to Your Cadillac
Is your 2017 Escalade ESV running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the electronic brain of your vehicle. A faulty ECM can cause a cascade of frustrating issues, from poor fuel economy and hesitation to a complete no-start condition. In my 20+ years of diagnostics, I’ve seen how a failing module can mimic dozens of other problems, leading to wasted time and money on incorrect repairs. This replacement 2017 Escalade ESV Engine Control Module is the direct, reliable solution to restore your vehicle’s factory performance and dependability.
We take the guesswork out of the replacement process. Unlike a generic part from a big box store, this module arrives at your door pre-programmed with the latest official GM software calibrations. All we need is your vehicle’s VIN at checkout. This critical step ensures the ECM communicates flawlessly with your Escalade’s specific systems, saving you a costly trip to the dealership for programming.
A Technician’s Notebook: The Ghost in the Machine
I once had a 2017 Sierra 1500 (which uses this exact same ECM) in my bay with a maddening intermittent no-start. The owner had already replaced the battery, starter, and fuel pump. Scans showed a slew of random communication codes (U-codes) but nothing consistent. After hours of tracing wires, I focused on the ECM. On the surface, it looked fine. But by monitoring live data during a startup attempt, I saw the 5-volt reference signal intermittently drop out—a dead giveaway of an internal ECM failure. We installed a VIN-programmed module just like this one, performed the quick security relearn, and the truck fired up instantly. It’s a perfect example of how the 2017 Escalade ESV Engine Control Module is the core of the vehicle’s operation.
Common Signs of a Failing ECM
- ✔ Check Engine Light is on with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0606, or U0100.
- ✔ Your vehicle cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency and engine power.
- ✔ Rough idling, stalling, or engine hesitation during acceleration.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Other warning lights (ABS, Traction Control) illuminate randomly due to lost communication.
Your Straightforward Installation Guide
Installing your new 2017 Escalade ESV Engine Control Module is a manageable job for a DIY enthusiast or a quick task for any professional mechanic. The key is following the correct post-installation procedures.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On most compatible trucks and SUVs, the ECM is located in the engine compartment, typically on the driver’s side. On the Corvette, it’s found in the passenger-side cowl area.
- Disconnect and Remove: Carefully unplug the wiring harness 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, pre-programmed ECM into place. Reconnect the wiring harnesses, ensuring they click securely into position. Reconnect the negative battery terminal.
- Perform Relearn Procedures: This is the most important step. In many cases, the vehicle will not start until a Vehicle Theft Deterrent System relearn is completed. This requires a scan tool with GM software capabilities (like Tis2web/Techline Connect). Other procedures, such as a Crankshaft Variation Relearn, may also be necessary to ensure optimal performance. This is the responsibility of the installer.
Verified Vehicle Compatibility
This module is a direct-fit replacement for several GM vehicles. Please verify your part number (12704476) or match your vehicle from the list below. Interchangeable part numbers include: 12692068, 12686382, 12674052, 12674472, 12678815.
- Cadillac Escalade / ESV: 2017
- Cadillac XTS: 2017 (3.6L Twin Turbo, VIN 8, opt LF3)
- Cadillac CTS: 2017 (6.2L Supercharged or 3.6L Twin Turbo)
- Cadillac ATS: 2017 (3.6L, VIN Y, opt LF4)
- Chevrolet Corvette: 2017
- Chevrolet Tahoe / Suburban 1500: 2017
- GMC Yukon / Yukon XL 1500: 2017
- Chevrolet Silverado 1500: 2016 (ID 12674472), 2017, 2018 (ID 12686382)
- GMC Sierra 1500 / Sierra Denali 1500: 2016 (ID 12674472), 2017, 2018 (ID 12686382)