Restore Your Vehicle’s Brain and Get Back on the Road Fast
Is your truck, van, or car suffering from a persistent check engine light, erratic behavior, or a no-start condition? A failing Engine Control Module (ECM) is often the culprit, acting like a broken command center for your vehicle’s most critical functions. This genuine OEM Engine Control Module, part number 12643636, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency. We take the guesswork and hassle out of the repair by professionally programming the module to your vehicle’s specific VIN before it ships. This means no expensive trips to the dealership for programming—it’s ready for installation right out of the box.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a faulty ECM is a likely cause. This module is the solution for problems such as:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606, or U-series communication codes
- Engine stalling, stumbling, or rough idling
- Poor fuel economy and reduced engine power
- Transmission shifting problems
- Complete no-start or intermittent starting issues
By ordering our Programmed GM ECM 12643636, you are not just buying a part; you are getting a comprehensive, ready-to-install fix that restores your vehicle’s core operating system to factory specifications.
Features & Benefits
- ✔ VIN-Specific Programming Included: We flash the module with the latest GM software updates for your exact vehicle. This ensures perfect compatibility and optimal performance without any additional programming required.
- ✔ Plug-and-Play Installation: Because the programming is done in-house, you or your mechanic can simply install the module, perform any necessary relearn procedures, and get back on the road.
- ✔ Restored Performance & Efficiency: With a correctly functioning ECM, your engine will regain its proper timing, fuel delivery, and emissions control, leading to smoother operation and better MPG.
- ✔ Wide GM Compatibility: This versatile module fits a broad range of vehicles, from heavy-duty workhorses like the Silverado 3500 and Express Van to efficient commuters like the Cruze and Sonic.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: The End of Dealership Headaches
As a technician with over 20 years on the floor, I remember the old way of replacing an ECM. It meant installing a blank module, having the vehicle towed to a dealership, and paying hundreds for them to program it. It was a costly, time-consuming nightmare, especially for work trucks where downtime is lost income. This Programmed GM ECM 12643636 changes the game. By handling the complex programming before we ship, we deliver a part that’s truly ready to solve the problem. It’s the most efficient and reliable way to get your vehicle—and your life—back to normal.
Frequently Asked Questions
Do I need to do any additional programming after installation?
No. This ECM comes fully programmed to your vehicle’s VIN with the latest GM updates. In some cases, a simple security or crankshaft position relearn procedure may be required after installation, which can be done with a capable scan tool.
How do I provide my VIN number?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we receive this information, as it is essential for the programming process.
How can I be sure this part will fit my vehicle?
Please check the extensive fitment list on this page. This module replaces several part numbers, including 12668866, 12668994, 12643636, and others. Providing your VIN ensures we program it correctly for your specific make, model, and options.
Is this a brand new part?
This is a high-quality, tested OEM component that has been meticulously inspected and programmed to ensure it meets or exceeds original factory standards for performance and reliability.
What does the warranty cover?
This unit is backed by our one-year replacement warranty, which covers the part itself in the event of failure. Please contact us for complete details and procedures.