Get Your Hard-Working Truck Back on the Job
When your Silverado 3500 is down, your work stops. A faulty Engine Control Module (ECM) can be the source of frustrating, hard-to-diagnose issues like poor performance, random stalling, or a persistent check engine light that keeps you from passing inspection. This isn’t just an inconvenience; it’s a threat to your livelihood. This direct-fit Engine Control Module is the definitive solution to get your truck running reliably again, programmed specifically for your vehicle so you can get back on the road with minimal downtime.
Common Symptoms & Your Solution
If your truck is experiencing any of the following, a failing ECM is a likely culprit. This module is the solution for issues such as:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0606 (ECM Processor Fault)
- Engine Stalling or Misfiring
- Poor Fuel Economy or Loss of Power
- Transmission Shifting Problems
- Complete No-Start Condition
Instead of wrestling with a trip to the dealership and paying high programming fees, we handle the critical software flashing for you. By providing your Vehicle Identification Number (VIN) during checkout, you receive a unit that is truly plug-and-play. This is the most efficient way to install a replacement 2012-2016 Silverado 3500 ECM 12668866 and restore your truck’s factory-spec performance.
Features & Benefits
- โ VIN-Programmed for Your Truck: Arrives ready for installation, loaded with the latest GM-certified software for your specific vehicle. No extra programming fees or dealer visits required.
- โ Restores Peak Performance: Corrects engine and transmission control issues, restoring the power, fuel efficiency, and smooth operation you rely on.
- โ Broad GM Compatibility: While perfect for the Silverado and Sierra HD trucks, this module also serves as a direct replacement for a wide range of GM vehicles, including the Express/Savana vans and even models like the Cruze and Sonic.
- โ Direct-Fit Replacement: Engineered to replace OEM part numbers 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200, ensuring a perfect fit and connection.
- โ Peace of Mind Included: This unit is backed by our one-year replacement warranty.
Expert Insight: The Brain of Your Operation
As a technician, I’ve seen countless work trucks sidelined by electrical gremlins. The ECM is the central computerโit manages everything from fuel injection and spark timing to transmission shift points and emissions. For a heavy-duty truck like a Silverado 3500, this is even more critical. It controls tow/haul modes and ensures the 6.0L engine is delivering reliable power under load. Using a precisely programmed 2012-2016 Silverado 3500 ECM 12668866 isn’t just about fixing a problem; it’s about restoring the core dependability your truck was built for. We ensure the software is 100% correct for your VIN, eliminating the compatibility issues that can plague non-programmed units.
Frequently Asked Questions
Do I need to do any programming myself?
No. We program the module to the VIN you provide before shipping. In most cases, you will only need to perform a simple security relearn procedure which can be done without any special tools. We include instructions for this process.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we have this information to ensure correct programming.
Is this compatible with other vehicles besides the Silverado?
Yes. This ECM, part number 12668866, is a direct replacement for a wide variety of GM vehicles. Please check the detailed fitment list on this page to confirm it matches your specific make, model, and year.
What if I have a different part number on my old ECM?
Please check our list of compatible part numbers (e.g., 12668994, 12643636). GM often supersedes part numbers. As long as your original number is on our list, this unit will be the correct, updated replacement for your vehicle.
What does the ECM actually do?
The Engine Control Module (ECM) is your vehicle’s main computer. It takes in data from sensors all over the engine and drivetrain to manage fuel delivery, ignition timing, and transmission shifting for optimal performance, fuel economy, and emissions control.
Don’t let a faulty computer keep you off the road. Order your pre-programmed 2012-2016 Silverado 3500 ECM 12668866 today and get your truck running right.