Is Your GM Truck or SUV Running Rough? Get a Reliable, Programmed Solution.
If you’re dealing with a persistent check engine light, poor fuel economy, stalling, or a no-start condition in your GM vehicle, a failing Engine Control Module (ECM) is often the culprit. As the brain of your engine, the ECM controls everything from fuel injection and ignition timing to transmission shifting. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose problems. This isn’t just an inconvenience; it’s a critical failure that sidelines your truck.
This listing is for a direct-replacement Engine Control Module, part number 12674052, that arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). We handle the complex part, loading the latest GM-certified software and calibrations so you can get back on the road with confidence.
The Smart Fix for Your Engine’s Brain
Don’t waste time and money at the dealership. Our VIN programming service makes this a straightforward repair for a competent DIYer or your trusted local mechanic.
- โ VIN-Programmed for You: We flash the module with the newest GM software using your VIN before shipping. This ensures perfect compatibility with your vehicle’s factory options.
- โ Restores Peak Performance: A new ECM can resolve issues like rough idling, hesitation, poor MPG, and failed emissions tests.
- โ Direct-Fit Replacement: Engineered to replace a wide range of original part numbers, guaranteeing a perfect fit and function.
- โ Solves Communication Errors: Eliminates diagnostic trouble codes (DTCs) related to internal module failure or lost communication with other vehicle systems.
Expert Pro Tip: Check Your Connectors First!
Before you condemn your old ECM, take a moment to inspect the module’s electrical connectors. Over the years, I’ve seen dozens of trucks where the actual problem was corrosion or a bent pin inside the connector, not a failed module. Unplug the harnesses (with the battery disconnected!) and look for any green or white crusty buildup. Cleaning them with a dedicated electronics cleaner and a small brush can sometimes solve intermittent communication issues and save you the cost of a replacement part. If they’re clean and the problem persists, the module is the next logical step.
Easy Installation Process for Your 2016-2018 Silverado 1500 ECM
Installing your new engine computer is a manageable job. For a 2016-2018 Silverado 1500, the ECM is typically located in the engine compartment on the driver’s side, near the air filter box.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system to discharge.
- Locate the ECM: Identify the module on the driver’s side of the engine bay. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully release the locking tabs on the electrical harnesses and pull them straight off. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new ECM into place and securely reconnect the electrical harnesses. You should hear and feel a click as they lock.
- Reconnect Battery: Re-attach the negative battery terminal and tighten it securely.
- Perform Relearn Procedures: This is the most critical final step. See the notice below.
IMPORTANT NOTICE: Post-Installation Procedures Required
This is not a simple plug-and-play part. While we program the module to your VIN, your vehicle’s security system must be synchronized with the new ECM. This is known as a Vehicle Theft Deterrent (VTD) Relearn. If this procedure is not performed, your vehicle will not start.
This relearn, along with other potential setups like a Crankshaft Position Variation Relearn or Injector Flow Rate Programming, must be completed using a professional GM-compatible scan tool with programming capabilities (such as a device with a subscription to GM’s Tis2web or Techline Connect). This is the responsibility of the installer. We guarantee the module is correctly programmed to your VIN; the final vehicle-side integration must be performed on-site.
Guaranteed Fitment for a Wide Range of GM Vehicles
This module, also known by part numbers 12692068, 12704476, 12686382, 12674472, and 12678815, fits the following models:
- 2017 Cadillac Escalade & ESV
- 2017 Cadillac XTS (3.6L Twin Turbo, VIN 8)
- 2017 Chevrolet Tahoe & Suburban 1500
- 2017 GMC Yukon & Yukon XL 1500
- 2017 Cadillac CTS (6.2L Supercharged or 3.6L Twin Turbo)
- 2017 Chevrolet Corvette
- 2016-2018 Chevrolet Silverado 1500 Pickup
- 2016-2018 GMC Sierra 1500 & Sierra Denali 1500 Pickup
- 2017 Cadillac ATS (3.6L, VIN Y)