Get Your GM Running Like New Again
Is your Corvette, Silverado, Escalade, or XTS suffering from frustrating and hard-to-diagnose issues? A faulty Engine Control Module (ECM) can cause everything from a simple check engine light to a no-start condition that leaves you stranded. Stop guessing and replace the brain of your engine with this genuine GM ECM, professionally programmed to your vehicle’s exact specifications. We take the complexity out of the repair by flashing the unit with the latest GM software updates using your VIN, ensuring a perfect match and restoring the performance and reliability you depend on.
Common Symptoms & Your Solution
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, a new Programmed 12704475 ECM is the definitive solution:
- Unexplained Check Engine Light (CEL) with codes like P0606 (ECM Processor Fault)
- Engine stalling, sputtering, or misfiring
- Poor fuel economy and reduced engine power
- Intermittent starting problems or a complete no-start condition
- Communication errors with diagnostic scan tools
- Transmission shifting issues or erratic behavior
This module is the central command unit for your engine. Installing our VIN-programmed ECM restores critical functions, corrects performance parameters, and gets you back on the road with confidence.
Features & Benefits
- โ VIN-Specific Programming: We flash the module with your vehicle’s VIN and the newest GM calibrations, eliminating the need for an expensive trip to the dealership for programming.
- โ Genuine GM Component: Ensures perfect compatibility and communication with your vehicle’s other electronic systems, from the transmission to the dashboard.
- โ Direct-Fit Replacement: This unit is a direct replacement for multiple part numbers, including 12704475, 12692069, 12680656, 12686383, and 12688528.
- โ Restored Performance: Corrects engine parameters to restore lost horsepower, torque, and fuel efficiency, making your vehicle drive like it just left the factory.
- โ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Note on Installation
As a technician with over two decades of experience, I’ve seen countless hours wasted trying to make a junkyard ECM work. The issue is security. Modern GM vehicles have a sophisticated Vehicle Anti-Theft System (VATS) that links the ECM to your specific key and BCM. Our Programmed 12704475 ECM arrives ready for this final step. Upon installation, a simple “theft relearn” procedure using a GM diagnostic tool is required to sync the new module to your vehicle. This is a standard, non-negotiable step for this repair. By handling the complex software flashing on our end, we save you the biggest headache, allowing you or your mechanic to complete the final, straightforward security handshake and get the engine firing.
Frequently Asked Questions
How do I provide my vehicle’s VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your ECM without it, so please provide it as soon as possible to avoid delays.
What is a “theft relearn” and why is it necessary?
The theft relearn is a security procedure that syncs the new ECM to your vehicle’s existing anti-theft system (keys, body control module, etc.). Without this step, the vehicle will recognize the new ECM as an unauthorized part and will not start. This procedure must be performed on the vehicle after the new ECM is installed using a compatible GM diagnostic system like Tis2web/Techline Connect.
Will this fix my car’s specific problem?
This Programmed 12704475 ECM will correct any issues directly caused by a faulty engine computer. However, it’s crucial that your vehicle is properly diagnosed before ordering. This part will not fix problems related to other failed components, such as bad sensors, wiring issues, or mechanical failures.
What other part numbers does this ECM replace?
This module is a direct, updated replacement for the following GM part numbers: 12704475, 12692069, 12680656, 12686383, and 12688528. Ordering this part ensures you receive the correct component with the most current software.
Do I need special tools for the physical installation?
The physical installation typically requires basic hand tools like socket wrenches and screwdrivers. However, the final, mandatory step of the installation is the security relearn, which requires a professional-grade GM-compatible diagnostic tool. This is not optional for the vehicle to start and run.