Is Your Vehicle Running Rough? Get the Definitive Solution.
Are you dealing with a persistent check engine light, erratic engine behavior, poor fuel economy, or even a no-start condition? These frustrating issues often point directly to a failing Engine Control Module (ECM), the central computer of your vehicle. This professionally programmed 12642665 Engine Control Module is the reliable, effective solution to restore your vehicle’s performance and get you back on the road with confidence.
Common Symptoms & Your Solution
A failing ECM can cause a wide range of problems that can be difficult to diagnose. If your vehicle is experiencing any of the following, a faulty module is the likely culprit:
- Persistent Check Engine Light (CEL) with various trouble codes
- Engine stalling, stumbling, or misfiring
- Noticeable decrease in fuel efficiency
- Harsh or incorrect automatic transmission shifting
- Communication errors with diagnostic scan tools
- Vehicle failing to start intermittently or at all
Replacing the computer with this pre-programmed 12642665 Engine Control Module is the direct path to resolving these complex electronic issues, saving you from endless diagnostic fees and the high cost of a dealership visit.
Features & Benefits You Can Count On
- ✔ VIN-Programmed for Your Vehicle: We flash this module with the latest GM-certified software using your specific Vehicle Identification Number (VIN). This critical step ensures perfect communication between the computer and your vehicle’s systems, eliminating the need for expensive dealership programming.
- ✔ Ready for Installation: Because the unit arrives programmed, it simplifies the installation process. This is a direct-fit replacement designed to get your vehicle running correctly and efficiently right away.
- ✔ Resolves Drivability Issues: Effectively corrects problems like poor idle, engine hesitation, false sensor codes, and erratic shifting caused by a failing computer.
- ✔ A Smart Dealership Alternative: Get the same reliable performance as a dealership part without the excessive cost and scheduling hassles. We ship it directly to you or your mechanic.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty, giving you confidence and peace of mind in your repair.
Expert Insight: The Right Diagnosis Saves Time & Money
“We had a customer with a 2012 Cadillac CTS experiencing intermittent stalling and a P0601 Internal Control Module Memory Check Sum Error. They had already spent hundreds on diagnostics with no clear solution. The problem was the original ECM was failing internally. By installing a properly programmed 12642665 Engine Control Module, we not only cleared the code permanently but also restored the smooth, responsive performance the owner expected. It’s a perfect example of how the right part, correctly programmed, is the only true fix for a faulty computer.”
Frequently Asked Questions
Do I need to do any additional programming myself?
No. This ECM arrives fully programmed to the VIN you provide. It is ready for installation. In some vehicles, a security or anti-theft relearn procedure may be required after installation, which can typically be done without special tools. Instructions are widely available online or in service manuals.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send it to us in a message referencing your order number. We cannot ship the part until we receive the VIN, as programming is a required step.
Is this a brand new part?
This is a high-quality, inspected, and tested replacement ECM. Each unit is verified to be fully functional before being programmed with the latest GM software for your vehicle, ensuring reliable performance.
How can I be sure this fits my vehicle?
Please review the detailed fitment list on this page. The most important step is to match your original part number to one of the numbers listed (12616889, 12630908, 12637106, 12642665, 12650256, 12651993). Providing your VIN for programming serves as a final check for compatibility.
What if I have an issue after installation?
Your purchase is protected. This unit is backed by our one-year replacement warranty. If you encounter any issues with the module itself, please contact us, and our support team will be ready to assist you.