Your Vehicle’s Engine Problems End Here
Is your truck, van, or SUV suffering from frustrating issues like a no-start condition, stalling, a persistent check engine light, or erratic performance? A failing Engine Control Module (ECM) is often the culprit, acting like a broken command center for your vehicle. This Programmed 12704475 ECM is the definitive, hassle-free solution to get your vehicle back on the road and running like new. We take the guesswork out of the equation by pre-programming this unit specifically to your vehicle’s VIN, ensuring a seamless and effective repair.
Common Symptoms & Your Direct Solution
If you’re experiencing any of the following, a faulty ECM is the likely cause:
- Vehicle will not start or is very difficult to start
- Check Engine Light is on with codes like P0601, P0603, or P0606
- Stalling or sputtering while driving
- Noticeable decrease in fuel economy
- Rough idling or poor engine performance
Instead of paying for expensive diagnostic time and programming fees at a dealership, this module arrives ready for installation. It’s the most efficient way to restore your vehicle’s core electronic functions and get your daily driver or workhorse back in service.
Features & Benefits
- ✔ VIN-Specific Programming: We flash this module with the latest GM software updates using your vehicle’s unique VIN. This ensures perfect compatibility and optimal performance, right out of the box.
- ✔ Cost-Effective Repair: Avoid the high costs and scheduling delays associated with dealership programming. This is a complete solution delivered to your door.
- ✔ Broad Compatibility: This unit is a direct replacement for multiple part numbers, including 12704475, 12692069, 12680656, 12686383, and 12688528, covering a wide range of GM vehicles.
- ✔ Restored Performance & Efficiency: With updated software and proper calibration, you can expect smoother operation, correct shifting patterns, and restored fuel efficiency.
- ✔ Plug & Play (with a caveat): While the physical installation is straightforward, please note that a security or theft-deterrent relearn may be required. This is a standard procedure for many modern vehicles.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Note on ECM Replacement
“In my 20+ years of diagnostics, one of the biggest mistakes I see is people trying to install a used, non-programmed ECM from a salvage yard. Modern vehicles are too complex; the ECM is tied to the vehicle’s security system, transmission, and specific engine parameters. Our process of programming the module to your exact VIN isn’t just a convenience—it’s the critical step that ensures the computer communicates correctly with every other system in your vehicle. It’s the difference between a quick, successful repair and a frustrating, expensive dead-end.”
Frequently Asked Questions
How do I provide my vehicle’s VIN?
After you complete your purchase, you can add your VIN to the order notes or simply reply to your order confirmation email with the 17-digit VIN. We cannot ship your part until we have this information.
What is a ‘theft relearn’ and will I need to do it?
A theft relearn is a security procedure that syncs the new ECM to your vehicle’s anti-theft system and keys. If your vehicle does not start after installation, this procedure will likely be required. It is the responsibility of the installer and may require a professional scan tool with GM programming capabilities, such as Tis2web or Techline Connect.
Is this part difficult to install?
The physical replacement of the ECM is typically straightforward, requiring basic hand tools. It’s usually located in the engine compartment. The most critical part of the process is ensuring any necessary post-installation relearn procedures (like the theft relearn or crankshaft variation relearn) are performed correctly.
Will this fix my specific problem or check engine light?
This Programmed 12704475 ECM will resolve any issues directly caused by a failing computer. However, it’s always best to have your vehicle properly diagnosed before ordering. If your check engine light is on due to a faulty sensor or mechanical issue, this part will not fix that problem.
Does this fit vehicles other than the 2018 Savana 2500?
Yes, absolutely. This ECM is compatible with a wide range of 2018 and some 2019 GM models, including the Silverado, Sierra, Tahoe, Suburban, Escalade, Corvette, and more. Please check the detailed fitment list on this page to confirm it matches your specific vehicle.
Do I need to send my old ECM back?
No, there is no core charge for this part. You can keep or responsibly dispose of your old module, making for a faster and simpler transaction.
