Get Your GM Truck or SUV Running Right Again
Is your Silverado, Suburban, or Escalade suffering from frustrating issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the brain of your vehicle. Don’t let a faulty computer keep you off the road. This professionally programmed engine control module is the definitive, reliable solution to restore your vehicle’s performance and your peace of mind.
Common Symptoms & Your Solution
A failing ECM can cause a wide range of confusing and intermittent problems. If you’re experiencing any of the following, this part is designed to be your solution:
- Erratic engine performance, stalling, or hesitation
- Failure to start or difficult starting
- Poor fuel economy and reduced power
- Check Engine Light (CEL) with communication error codes (U-codes)
- Problems with automatic transmission shifting
- Inaccurate dashboard gauge readings
Instead of paying for expensive diagnostic time and programming fees at a dealership, you can get a fully updated and VIN-matched Programmed 12704475 ECM delivered to your door. We take the guesswork out of the repair, providing a core component that is ready for installation and the final security relearn procedure.
Features & Benefits
- ✔ VIN-Specific Programming: We flash this module with the latest GM factory software using your vehicle’s unique VIN. This ensures perfect communication and compatibility with your specific systems.
- ✔ Restored Performance: By installing a correctly functioning ECM, you restore the precise fuel delivery, ignition timing, and transmission control your vehicle had when it was new.
- ✔ Direct-Fit Replacement: This unit is a direct replacement for multiple GM part numbers, including 12704475, 12692069, 12680656, 12686383, and 12688528, guaranteeing a perfect fit.
- ✔ Cost-Effective Solution: Avoid the high costs and scheduling delays of a dealership visit. This is the most efficient way to get the right part, programmed correctly, the first time.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: Understanding the ‘Theft Relearn’ Process
After installing your new Programmed 12704475 ECM, your vehicle’s security system will prevent it from starting. This is not a defect; it’s a critical security feature! The Vehicle Theft Deterrent (VTD) system sees the new ECM as an unauthorized part until it’s properly introduced. A ‘theft relearn’ procedure, performed with a GM-specific tool like Tis2web or Techline Connect, syncs the new ECM with your vehicle’s immobilizer. While we handle the complex engine calibration programming, this final security handshake must be done on the vehicle by your mechanic. It’s a standard final step for this type of repair that ensures your vehicle remains secure.
Frequently Asked Questions
How do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your ECM without it. Please double-check the VIN for accuracy to ensure a perfect match.
Is this ECM ready to install when it arrives?
Yes, it is programmed and ready for physical installation. However, as noted, you or your technician must perform the Vehicle Theft Deterrent (VTD) relearn procedure after installation for the vehicle to start and run. Other vehicle-specific setups, like a crankshaft variation relearn, may also be necessary.
Can I perform the theft relearn myself?
The VTD relearn requires access to GM’s proprietary software (Tis2web/Techline Connect) and a compatible scan tool. This is typically performed by a professional automotive technician or a well-equipped independent shop. We strongly recommend having a qualified mechanic complete the installation.
Will this fix my check engine light?
If the check engine light and performance issues are caused by a faulty ECM, this part is the correct solution. It is essential to have a proper diagnosis performed to confirm the original ECM is the point of failure before ordering. This Programmed 12704475 ECM will not fix problems caused by other faulty sensors or mechanical issues.
What if my part number isn’t listed?
This ECM replaces several part numbers, including 12704475, 12692069, 12680656, 12686383, and 12688528. Please verify that your original part number is on this list or contact us with your VIN to confirm compatibility before ordering.
What is your return policy?
Because each unit is custom-programmed to a specific VIN, they are non-refundable once the programming process has begun. Please ensure your vehicle has been properly diagnosed before placing an order. This unit is backed by our one-year replacement warranty for any defects in the module itself.