Restore Your Cadillac’s Signature Smoothness
Is your Cadillac DTS experiencing frustrating and unpredictable issues like stalling, rough idling, a persistent check engine light, or even a complete failure to start? These are common indicators that the heart of your vehicle’s management system—the engine control module—may be failing. Don’t let a faulty computer compromise the luxury and reliability you expect. This professionally programmed 2009-2011 Cadillac DTS engine control module is the definitive, hassle-free solution to get your vehicle running perfectly again.
Common Symptoms & Your Direct Solution
A failing ECM can cause a cascade of problems that are often misdiagnosed. If you’re experiencing any of the following, a faulty module is the likely culprit:
- Persistent Check Engine Light (CEL) with codes like P0606 or U0100
- Engine stalling or shutting off while driving
- Noticeable decrease in fuel economy
- Rough or erratic engine idle
- Difficulty or inability to start the vehicle
- Poor engine performance and hesitation
- Transmission shifting issues
This unit is the direct answer to these problems. We take the guesswork and high costs out of the equation by pre-programming this module to your vehicle’s specific Vehicle Identification Number (VIN). It arrives ready for installation, loaded with the latest software updates directly from GM, ensuring all systems communicate flawlessly from the moment it’s connected.
Features & Tangible Benefits
- ✔ VIN-Programmed for Your Cadillac: This module arrives ready to install, saving you a costly and time-consuming trip to the dealership for programming.
- ✔ Loaded with Latest GM Updates: We flash the unit with the newest factory software, ensuring optimal engine performance, fuel efficiency, and emissions control.
- ✔ Restores Original Performance: Eliminate drivability issues and bring back the smooth, responsive, and powerful feel your Cadillac was built to deliver.
- ✔ Guaranteed Compatibility: A direct replacement for a wide range of service numbers including 12636659, 12628993, and 12625453, ensuring a perfect fit and function.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Note on Programming: We once had a client with a beautiful Buick Lucerne (which shares this ECM) who bought a used module from a salvage yard. The car started, but the transmission shifted harshly and the anti-theft system kept locking him out. The problem? The module was programmed for a different vehicle with different options. Our VIN-specific programming for your 2009-2011 Cadillac DTS engine control module ensures every component—from the engine and transmission to the climate control—communicates correctly. It’s not just about starting the car; it’s about restoring the complete, integrated system that defines the luxury driving experience.
Frequently Asked Questions
Is this ECM really plug-and-play?
Yes, for the most part. Because we program the module to your car’s VIN, it is ready to be installed. However, on many GM vehicles, you may need to perform a simple security relearn procedure (often called the “key cycle relearn”) which pairs the new ECM to your keys. This process takes about 10-15 minutes and can be done yourself without any special tools.
How do I provide you with my VIN?
It’s easy! You can add your 17-digit VIN in the notes section during checkout. If you forget, don’t worry—we will contact you via email after your purchase to request the information before we program and ship your module.
Will this fix my car’s specific issue?
This module is the definitive solution for a confirmed ECM failure. While it resolves the common symptoms listed above, we always recommend that a proper diagnosis is performed by a qualified mechanic to rule out other potential issues like faulty sensors or wiring. If the ECM is confirmed to be the problem, this part will fix it.
My original part number isn’t on the list. Will this still work?
The part numbers listed (like 12636659, 12639300, etc.) are the most common service numbers. This module is designed as a direct replacement for the 2009-2011 Cadillac DTS engine control module and other compatible vehicles listed in the fitment chart. If you are unsure, please contact us with your VIN, and we will be happy to verify compatibility for you.
What does being programmed with the ‘newest updates’ mean for my car?
Vehicle manufacturers like GM often release software updates to improve things like transmission shifting logic, fuel efficiency, emissions performance, and even fix minor bugs. By flashing your module with the latest version, you are ensuring your vehicle runs on the most refined and efficient software available, which can be a significant improvement over what it left the factory with years ago.