Restore Peak Performance to Your Cadillac STS
Is your 2009-2010 Cadillac STS suffering from frustrating issues like a persistent check engine light, erratic engine behavior, or a complete failure to start? These are classic signs of a failing Engine Control Module (ECM), the critical computer that manages your vehicle’s engine, transmission, and emissions systems. Don’t let a faulty computer compromise the luxury and performance you expect. This professionally programmed engine control module is the definitive, reliable solution to get your Cadillac running smoothly and efficiently once again.
This isn’t just a replacement part; it’s a fully prepared, plug-and-play solution. Before we ship, our expert technicians will flash the module with the latest official GM software updates and program it specifically to your car’s unique Vehicle Identification Number (VIN). This critical step ensures seamless communication with all other onboard systems, eliminating the need for an expensive trip to the dealership for coding. By purchasing this 2009-2010 Cadillac STS programmed engine control module, you are choosing a hassle-free path to restoring your vehicle’s original power and reliability.
Common Symptoms of a Failing ECM & Your Direct Solution
If you’re experiencing any of the following, a faulty ECM is the likely culprit:
- Illuminated Check Engine Light (CEL) with various Diagnostic Trouble Codes (DTCs)
- Engine stalling, sputtering, or misfiring
- Noticeable decrease in fuel economy
- Harsh or incorrect transmission shifting
- Intermittent or complete no-start condition
- Communication errors with diagnostic scan tools
This module is the direct-fit answer to these problems, engineered to restore communication and proper function to your vehicle’s powertrain, ensuring every component works in perfect harmony as the manufacturer intended.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: Arrives ready for installation, no dealership programming required. This saves you time and significant expense.
- ✔ Loaded with Latest GM Software: We flash the unit with the most current updates from General Motors, ensuring optimal performance and efficiency.
- ✔ Restores Original Function: Eliminates common issues like misfires, poor idling, and shifting problems tied to a failing computer.
- ✔ Direct-Fit OEM Replacement: Guaranteed to be fully compatible with the extensive list of service numbers, including 12636659, 12639300, 12628993, and more.
- ✔ One-Year Replacement Coverage: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
Many people wonder if they can just swap an ECM from another vehicle. For modern GM cars like your Cadillac, the answer is a firm no. The ECM is tied directly to your vehicle’s security system (VATS/Passlock) and calibrated for your specific engine, transmission, and options. Installing a non-programmed module will result in a no-start condition. Our VIN programming service handles this complex process for you, ensuring the new 2009-2010 Cadillac STS programmed engine control module is accepted by your car’s security system and all other computers, making the installation as simple as swapping the physical part.
Take the guesswork out of your repair. By providing your VIN at checkout, you empower our technicians to deliver a component that is perfectly matched and ready to restore the sophisticated performance of your Cadillac. This is the most effective and reliable way to solve complex electronic issues and regain confidence in your vehicle. Order your 2009-2010 Cadillac STS programmed engine control module today and experience the difference a correctly prepared component makes.
Frequently Asked Questions
What information do I need to provide after ordering?
After you place your order, you must provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). This is essential for us to program the module correctly for your specific car.
Will I need to do any additional programming after installation?
No. This ECM comes fully programmed and ready for installation. In most cases, it is a plug-and-play process. A security or crank variation relearn may be required on some models, which can be performed with a capable scan tool.
Where can I find my vehicle’s VIN?
Your VIN can be found on a metal plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, and on your vehicle’s registration and insurance documents.
My original ECM has a different part number. Will this still work?
Yes. This module is a direct replacement for a wide range of GM service numbers, including 12636659, 12639300, 12628993, and all others listed in the description. As long as your original part number is on our list, this unit is a compatible replacement.
Can a bad ECM cause transmission problems?
Absolutely. The Engine Control Module works directly with the Transmission Control Module (TCM) to manage shift points and behavior. A failing ECM can send incorrect data, leading to poor shifting, hesitation, or getting stuck in gear.