Restore Peak Performance to Your GM Vehicle
Is your Silverado, Yukon, or Corvette suffering from baffling electrical problems, a no-start condition, or a persistent check engine light? A failing Engine Control Module (ECM) is often the culprit, acting as the vehicle’s brain and controlling everything from fuel mixture to transmission shifts. This replacement ECM, part number 12704475, is the definitive, reliable solution to get your vehicle back on the road, running exactly as it should. We take the guesswork out of the repair by pre-programming the module to your specific VIN, ensuring a seamless integration with your vehicle’s systems.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a faulty ECM is the likely cause. This professionally prepared module is designed to resolve them:
- Complete no-start or intermittent starting problems
- Poor engine performance, misfires, or reduced fuel economy
- Erratic transmission shifting or gear selection issues
- Check Engine Light with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, or P0606
- Various warning lights on the instrument cluster with no other apparent cause
By installing our Programmed 12704475 ECM, you are not just replacing a part; you are restoring the core logic and operational integrity of your vehicle’s powertrain.
Features & Tangible Benefits
- ✔ VIN-Specific Programming: We flash the module with the latest GM software updates using your vehicle’s VIN. This eliminates the need for expensive dealership programming, saving you time and money.
- ✔ Direct-Fit Replacement: This unit is a direct replacement for multiple part numbers, including 12704475, 12692069, 12680656, 12686383, and 12688528, guaranteeing a perfect fit.
- ✔ Restored Drivability: A correctly functioning ECM ensures precise fuel delivery, optimal engine timing, and smooth transmission operation, bringing back the performance you expect.
- ✔ Cost-Effective Repair: Get a high-quality, professionally prepared component without the premium price tag of a dealership parts counter.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Note on Installation
We handle the complex part—the programming. Your new ECM will arrive ready to be installed. However, please be aware that on virtually all modern GM vehicles, a security handshake is required between the new ECM and the vehicle’s anti-theft system. This is known as a “Vehicle Theft Deterrent Relearn.” This is a standard, non-negotiable step for this repair and must be performed by the installer using a capable scan tool or GM’s TIS2WEB/Techline Connect software. Planning for this final step ensures a smooth and successful repair.
Frequently Asked Questions
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is your car’s unique 17-digit serial number. We require it to load the exact factory software and calibrations for your vehicle’s specific engine, transmission, and options, ensuring the Programmed 12704475 ECM works perfectly right out of the box.
Will this ECM be completely plug-and-play?
It is plug-in ready, but not entirely ‘play’. After installation, you or your mechanic must perform a Vehicle Theft Deterrent (VTD) relearn. This security procedure syncs the new ECM to your vehicle and is a required step before the engine will start. Other minor relearns, like for the crankshaft position sensor, may also be necessary depending on the model.
How do I find my original part number?
The part number is printed on a sticker on your original ECM. You can verify it matches one of the compatible numbers listed: 12704475, 12692069, 12680656, 12686383, or 12688528. However, our VIN programming ensures compatibility even if your number differs slightly.
What tools are needed for the theft relearn procedure?
A professional-grade scan tool with GM-specific software capabilities or access to GM’s official Techline Connect (formerly TIS2WEB) system is required. Most professional repair shops have this equipment.
Does this fit my vehicle?
This ECM fits a wide range of 2018-2019 GM models including the Corvette, Silverado/Sierra 1500, Tahoe/Yukon/Suburban/Escalade, and Express/Savana vans. Please review the detailed fitment list on this page. Providing your VIN during checkout is the best way to guarantee a perfect match.