Restore Peak Performance to Your GM Vehicle
Is your truck or SUV suffering from baffling electrical gremlins? A no-start condition, stalling, poor fuel mileage, or a persistent Check Engine Light can often be traced back to one critical component: the Engine Control Module (ECM). As a technician with over 20 years of experience, I’ve seen firsthand how a failing ECM can mimic a dozen other problems, leading to frustrating and expensive diagnostic dead ends. This isn’t just a part; it’s the central command center for your engine’s operation, and when it falters, your vehicle’s reliability is compromised.
We offer a straightforward, reliable solution. This genuine GM Engine Control Module, compatible with part number 12674472, arrives at your door pre-programmed with the latest GM factory software, specifically matched to your vehicle’s VIN. This critical step saves you a trip to the dealership and the high costs associated with their programming services. By providing us with your VIN at checkout, you ensure that the brain of your engine is ready for duty, calibrated precisely for your vehicle’s specifications.
A Technician’s Notebook
I remember a 2017 Silverado 1500 that came into the bay with a complaint of intermittent stalling at stoplights and a flashing Check Engine Light. The owner had already replaced the throttle body and a few sensors with no luck. My scan tool pulled a P0606 code—ECM/PCM Processor Fault. While other issues can sometimes trigger this, the intermittent nature of the problem pointed directly to the ECM itself. We installed a VIN-programmed module, performed the quick crankshaft variation relearn, and the truck ran perfectly. The customer was relieved to finally have a definitive fix after weeks of uncertainty. This is a classic scenario where replacing the 2017 Escalade Engine Module or its equivalent in another GM model is the only correct path forward.
Is Your GM Vehicle Showing These Red Flags?
A failing ECM can manifest in various ways. If you’re experiencing any of the following, this module is likely the solution you need.
- ✔ Vehicle will not start or is very difficult to start.
- ✔ Intermittent stalling or rough idling for no apparent reason.
- ✔ Significant decrease in fuel economy.
- ✔ Check Engine Light is illuminated with communication or internal processor codes (e.g., P0601, P0606, U0100).
- ✔ Poor engine performance, hesitation, or misfires.
- ✔ Automatic transmission shifting erratically or harshly.
Your Step-by-Step Installation Roadmap
While the physical swap is straightforward for a DIYer or professional, please read these steps carefully, especially regarding the security relearn procedure.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any work on the electrical system.
- Locate the ECM: On most compatible trucks and SUVs like the Escalade, Tahoe, and Silverado, the ECM is found in the engine compartment on the driver’s side. On vehicles like the Corvette, it may be located in the cowl area.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that must be released. Once disconnected, unbolt the old module from its mounting bracket and remove it.
- Install the New Module: Bolt the new, pre-programmed 2017 Escalade Engine Module into place. Reconnect the wiring harnesses, ensuring they click securely into place.
- Reconnect Battery: Reattach the negative battery terminal.
- CRITICAL – Security Relearn: Attempt to start the vehicle. If it starts and runs, you are all set. If it cranks but does not start, you MUST perform the Vehicle Theft Deterrent (VTD) relearn procedure. This requires a compatible scan tool or access to GM’s TIS2Web/Techline Connect service. This is a standard security step and 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 achieve optimal performance.
Will This Fit My Vehicle? Check Here.
This ECM is a direct replacement for part number 12674472 and is also compatible with part numbers 12692068, 12704476, 12686382, 12674052, and 12678815. It fits a wide range of GM models. Please verify your vehicle and options below:
- Cadillac ATS 2017: (3.6L, VIN Y, opt LF4)
- Cadillac CTS 2017: (6.2L Supercharged) or (3.6L, VIN 8, opt LF3, twin turbo)
- Cadillac Escalade / Escalade ESV 2017
- Cadillac XTS 2017: (3.6L, VIN 8, opt LF3)
- Chevrolet Corvette 2017
- Chevrolet Silverado 1500 Pickup 2016: (ID 12674472)
- Chevrolet Silverado 1500 Pickup 2017
- Chevrolet Silverado 1500 Pickup 2018: (ID 12686382)
- Chevrolet Suburban 1500 2017
- Chevrolet Tahoe 2017
- GMC Sierra 1500 Pickup 2016: (ID 12674472)
- GMC Sierra 1500 Pickup 2017
- GMC Sierra 1500 Pickup 2018: (ID 12686382)
- GMC Sierra Denali 1500 2017-2018: (ID 12686382 for ’18)
- GMC Yukon / Yukon XL 1500 2017
Do I need to do anything after installing this ECM?
Do I need to do anything after installing this ECM?
Maybe. After installation, if your vehicle does not start, you must perform a security relearn (Vehicle Theft Deterrent relearn) using a professional scan tool or GM’s software. Other relearns, like for the crankshaft position sensor, may also be required for perfect operation. This is the installer’s responsibility.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the 2017 Escalade Engine Module with the correct software and calibrations for your specific engine, transmission, and options. This ensures compatibility and proper function right out of the box.
Is this a simple plug-and-play part?
It is a direct physical fit and is pre-programmed, which handles the most complex part. However, due to GM’s anti-theft systems, you may need to perform a security relearn procedure. So, while it’s close, it’s not always 100% plug-and-play.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (common codes include P0601-P0606) or a communication fault (U-codes), then yes, this part will resolve the issue. Always properly diagnose the vehicle first to confirm the ECM is the point of failure.