Restore Peak Performance to Your General Motors Vehicle
Is your Cadillac, Chevrolet, or GMC vehicle suffering from perplexing issues like a persistent check engine light, poor fuel economy, stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance, fuel delivery, and emissions. Don’t let a faulty computer keep you off the road. This direct-fit Engine Control Module, part number 12704476, is the reliable solution to restore your vehicle’s factory performance and drivability.
We take the guesswork and high dealership costs out of the equation. Unlike a generic module from a parts store, this ECM is professionally programmed specifically for your vehicle before it ships. Simply provide us with your Vehicle Identification Number (VIN) during checkout, and our technicians will flash the unit with the latest, most stable software updates directly from GM. This ensures seamless integration and optimal performance right out of thebox, saving you a costly trip to the dealer for programming.
Expert Pro Tip
Expert Pro Tip
After installing your new ECM, a ‘Vehicle Theft Deterrent Relearn’ procedure is often required. This is a standard security step that syncs the new module with your vehicle’s anti-theft system. While we handle the main programming, this final step must be performed on the vehicle using a GM-specific tool like Tis2web or Techline Connect. We strongly recommend coordinating with a qualified technician who has access to this equipment to ensure a smooth installation process.
Is Your 2017 ATS Engine Module Failing?
A failing ECM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, it’s a strong indication that your engine computer may be the culprit. Proper diagnosis is key, but these are the most common indicators of a faulty module:
- ✔ Check Engine Light: The light is illuminated, often with communication-related trouble codes (U-codes) or performance codes that don’t resolve after replacing other parts.
- ✔ No-Start or Hard Starting: The engine cranks but refuses to start, or takes an unusually long time to fire up, especially when warm.
- ✔ Poor Engine Performance: Noticeable loss of power, hesitation during acceleration, and rough idling.
- ✔ Reduced Fuel Economy: A sudden and unexplained drop in your vehicle’s MPG can be caused by incorrect fuel and air mixture calculations from a faulty ECM.
- ✔ Intermittent Stalling: The vehicle may stall unexpectedly while driving or when coming to a stop.
- ✔ Transmission Shifting Issues: The ECM communicates with the transmission controller, and a fault can lead to harsh or erratic shifting.
Plug-and-Play Solution with VIN Programming
This isn’t just a part; it’s a comprehensive solution. The core of this service is our VIN-based programming. By flashing the module with your vehicle’s specific calibration files, we ensure that it controls the engine exactly as the manufacturer intended. This process accounts for your vehicle’s specific options, emissions standards, and powertrain configuration. This attention to detail prevents compatibility issues and ensures a smooth installation process. Remember, while the main software is loaded, final security and system relearns, like the crankshaft position sensor relearn, must be completed once the module is installed in the vehicle.
Compatible Part Numbers:
This module is a direct replacement for several GM part numbers. If your original module has any of the following numbers, this unit is the correct fit for your vehicle: 12692068, 12704476, 12686382, 12674052, 12674472, 12678815.
Verified Vehicle Fitment:
This ECM is compatible with a wide range of popular GM trucks, SUVs, and performance cars. Please verify your vehicle and options below:
- Cadillac ATS (2017): 3.6L, VIN Y (8th digit, opt LF4)
- Cadillac CTS (2017): 6.2L (supercharged) or 3.6L, VIN 8 (8th digit, opt LF3, twin turbo)
- Cadillac Escalade / ESV (2017)
- Cadillac XTS (2017): 3.6L, VIN 8 (8th digit, opt LF3)
- Chevrolet Corvette (2017)
- Chevrolet Silverado 1500 (2016-2018)
- Chevrolet Suburban 1500 (2017)
- Chevrolet Tahoe (2017)
- GMC Sierra 1500 / Denali 1500 (2016-2018)
- GMC Yukon / Yukon XL 1500 (2017)
Frequently Asked Questions
Expert Pro Tip
After installing your new ECM, a ‘Vehicle Theft Deterrent Relearn’ procedure is often required. This is a standard security step that syncs the new module with your vehicle’s anti-theft system. While we handle the main programming, this final step must be performed on the vehicle using a GM-specific tool like Tis2web or Techline Connect. We strongly recommend coordinating with a qualified technician who has access to this equipment to ensure a smooth installation process.