Is Your GM Truck or SUV Suffering from Mysterious Electrical Problems?
As a mechanic with over two decades of experience under the hood, I’ve seen it all. A 2017 Cadillac Escalade, Chevy Tahoe, or GMC Sierra comes into the bay with a frustrating combination of issues: a persistent check engine light, erratic shifting, a no-start condition that leaves you stranded, or a dashboard lit up with communication error codes. Often, the root cause points directly to a failing Engine Control Module (ECM) – the brain of your vehicle’s powertrain.
When the ECM fails, it can feel like a complex and expensive problem. Dealerships often charge a premium for the part and then add hundreds more for programming. This listing is your solution. We provide a high-quality replacement ECM, part number 12674052, that we program specifically for your vehicle before it ships. Just provide us with your Vehicle Identification Number (VIN) during checkout, and our technicians will flash the module with the latest GM-certified software for your exact build. This eliminates the need for expensive dealer-only tools for the initial programming.
Get Your 2017 Escalade Engine Module Pre-Calibrated and Ready for Installation
A properly functioning ECM is critical for everything from fuel economy to engine timing and transmission performance. Don’t settle for a part that causes more headaches. This module is the definitive fix for a wide range of common GM vehicle problems.
- ✔ Fixes No-Start Conditions: Resolves issues where the engine cranks but won’t start due to a faulty ECM.
- ✔ Clears Persistent Check Engine Lights: Corrects false sensor readings and internal module faults that trigger DTCs.
- ✔ Restores Smooth Performance: Eliminates rough idling, poor acceleration, and incorrect transmission shifting patterns.
- ✔ VIN-Programmed for You: Arrives with the correct software for your vehicle, saving you a trip to the dealership for initial setup.
- ✔ Broad Compatibility: A direct replacement for multiple GM part numbers, ensuring a perfect match.
Expert Pro Tip: Check Your Grounds Before Replacing
In my shop, I’ve seen countless ECMs get misdiagnosed. Before you assume the module is bad, do a simple but critical check. Locate the main engine-to-chassis ground strap. On many of these GM trucks and SUVs, it’s a braided strap near the passenger side motor mount. Over time, it can corrode or break, causing voltage drops and communication errors that perfectly mimic a failed ECM. A 5-minute inspection with a wire brush can sometimes save you hundreds of dollars and hours of frustration. A clean, tight ground connection is essential for any modern vehicle’s electronics.
Installation and Post-Installation Requirements
Installing your new ECM is straightforward. However, please be aware that for modern GM vehicles, additional steps are required after the physical installation to ensure full functionality and security.
- Safety First: Disconnect the negative battery terminal and wait 10-15 minutes for the system capacitors to discharge.
- Locate the ECM: On most compatible trucks and SUVs (Tahoe, Yukon, Sierra, Silverado, Escalade), the ECM is located in the engine compartment on the driver’s side, near the firewall or inner fender.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a small screwdriver to gently release the locking tabs. Then, unbolt the module from its bracket.
- Install the New Module: Bolt the new, pre-programmed module into place and securely reconnect the electrical harnesses. Ensure they click into place. Reconnect the battery terminal.
IMPORTANT: Post-Installation Procedures
While we handle the main programming, your vehicle’s anti-theft system needs to recognize the new module. This is a security feature built in by GM.
- Vehicle Theft Deterrent System (VTDS) Relearn: If the vehicle does not start after installation, a security relearn must be performed. This procedure requires a GM-specific diagnostic tool with access to TIS2Web or Techline Connect. This is a standard procedure for any professional automotive shop.
- Other Relearns: Depending on your vehicle’s specific configuration, other procedures like a Crankshaft Variation Relearn or injector flow rate programming may be necessary to achieve optimal performance. These are the responsibility of the installer.
This module is a direct replacement for the following part numbers: 12692068, 12704476, 12686382, 12674052, 12674472, 12678815. Please verify your part number before ordering to ensure compatibility.