Get Your Truck Running Right Again
Is your truck suffering from puzzling electrical issues, a persistent check engine light, or a no-start condition? A failing Engine Control Module (ECM) can bring your powerful vehicle to a grinding halt, causing immense frustration and costly downtime. This is not just an inconvenience; it’s a roadblock to your work and daily life. Our pre-programmed 12668991 ECM is the definitive, hassle-free solution to restore your vehicle’s performance and reliability, getting you back on the road with confidence.
Common Symptoms & Your Solution
A faulty ECM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, this module is your answer:
- Check Engine Light (CEL): Often with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606, or U-codes.
- No-Start or Hard-Start: The engine cranks but refuses to fire up, or takes an extended time to start.
- Poor Engine Performance: Noticeable loss of power, rough idling, stalling, or hesitation during acceleration.
- Reduced Fuel Economy: The ECM controls the fuel mixture; a failing unit can cause your vehicle to consume more fuel than usual.
- Transmission Shifting Issues: In many vehicles, the ECM works with the TCM, and a fault can lead to harsh or erratic shifting.
Instead of paying for expensive dealership diagnostics and programming fees, this Programmed 12668991 ECM arrives ready for installation. We handle the complex part, so you can handle the simple swap.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with your vehicle’s exact VIN and the latest GM-certified software, ensuring perfect communication with all onboard systems.
- ✔ Plug & Play Installation: This unit is prepared for a direct installation. In most cases, no additional programming is required, saving you a costly trip to the dealer.
- ✔ Restored Factory Performance: By using the newest OEM calibrations, this ECM ensures your engine operates at peak efficiency, power, and fuel economy.
- ✔ Cost-Effective Solution: Get a reliable, professionally prepared module at a fraction of the cost of a new unit from a dealership.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Note on Modern Vehicle Electronics
As a technician with over 20 years of experience, I’ve seen how integrated vehicle systems have become. The ECM is the ‘brain’ of your engine, managing everything from fuel injection timing to spark delivery. For a heavy-duty truck like a Sierra or Silverado, this precision is critical for towing, hauling, and overall dependability. Simply installing a used, unprogrammed module is a recipe for failure. Our VIN-matching service isn’t just a convenience—it’s a necessity for ensuring all of your vehicle’s components work together exactly as the engineers intended.
Guaranteed Fitment & Compatibility
This Engine Control Module is a direct replacement for the following part numbers:
12668866, 12668994, 12643636, 12663405, 12670335, 22819494, 12692200
It is confirmed to fit a wide range of GM vehicles, including but not limited to:
- Chevrolet Silverado 2500/3500 (2012-2016, 6.0L)
- GMC Sierra 2500/3500 & Denali (2012-2016, 6.0L)
- Chevrolet Express & GMC Savana Vans (2016, 4.8L/6.0L)
- Chevrolet Cruze & Volt (Various years, see list)
- Chevrolet Sonic & Trax (Various years, see list)
- Buick Encore (Various years, see list)
- And many more models as detailed in the fitment chart.
Don’t let a bad computer keep your vehicle down. Order your Programmed 12668991 ECM today and restore the reliable performance you depend on.
Frequently Asked Questions
Do I need to send you my VIN?
Yes, providing your Vehicle Identification Number (VIN) is mandatory. We cannot ship the module until we receive your VIN, as we use it to load the correct, vehicle-specific software and updates onto the ECM. This ensures a perfect match and proper function.
Is this really ‘Plug and Play’?
For the vast majority of vehicles, yes. Once installed, the module is ready to go. However, some vehicles may require a simple security relearn procedure (often called a CASE relearn or anti-theft relearn), which can typically be done without special tools. Instructions for this procedure are widely available online or in service manuals.
Do I need to return my old ECM?
No core charge or return is required for this part. You can keep your old module or dispose of it responsibly.
Will this fix my specific problem?
This module will resolve issues directly caused by a faulty ECM. While the symptoms listed are common indicators of ECM failure, we always recommend a proper diagnosis by a qualified mechanic to confirm the ECM is the source of the problem before purchasing.
What if I have questions during installation?
While we cannot provide vehicle-specific repair advice, we are here to support our product. If you have questions about the module itself, please contact us. For installation procedures, we recommend consulting a professional mechanic or a reliable service manual for your vehicle.