Restore Your Cadillac’s Peak Performance & Reliability
Is your Cadillac STS experiencing frustrating issues like a persistent Check Engine Light, unpredictable stalling, or a complete failure to start? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s performance. This pre-programmed ECM is the definitive, hassle-free solution to restore the smooth, responsive, and reliable driving experience you expect from your Cadillac. It arrives at your door flashed with the latest GM software and coded specifically to your vehicle’s VIN, eliminating the need for expensive dealership programming.
Common Symptoms of a Failing ECM & Your Solution
A faulty engine computer can cause a wide range of confusing problems. If you’re noticing any of the following, this module is the solution you need. This high-quality 2009-2010 Cadillac STS Engine Control Module is engineered to resolve these issues and get you back on the road with confidence.
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606, or other communication errors
- Engine stalling or cutting out unexpectedly
- Rough or erratic idling
- Noticeable decrease in fuel economy
- Difficulty starting the engine or a no-start condition
- Transmission shifting problems
Features & Tangible Benefits
- ✔ Plug & Drive Installation: This unit comes fully programmed to your vehicle’s unique VIN. No extra trips to the mechanic or dealership for programming are required.
- ✔ Updated GM Software: We flash the module with the newest vehicle-specific updates from General Motors, ensuring optimal engine performance, fuel efficiency, and emissions control.
- ✔ Guaranteed Compatibility: By matching the programming to your VIN, we ensure this ECM communicates perfectly with your Cadillac’s security, transmission, and other electronic systems.
- ✔ Cost-Effective Solution: Avoid the high costs and scheduling delays associated with dealership parts and service. This is a direct, affordable path to fixing your vehicle correctly.
- ✔ One-Year Warranty: This unit is backed by our one-year replacement warranty, giving you confidence in your purchase.
Expert Technician’s Note: In modern vehicles like the Cadillac STS, the ECM is more than just an engine controller; it’s the nerve center of the entire vehicle. It’s integrated with the anti-theft system (immobilizer), transmission controls, and even the instrument cluster. That’s why simply installing a used, non-programmed module from another car will result in a no-start condition. Our VIN-programming service handles this complex digital handshake for you, making the installation process as simple as physically swapping the part.
Take control of your repair and restore your vehicle’s integrity with a reliable, professionally programmed 2009-2010 Cadillac STS Engine Control Module. This is the smartest way to solve complex electronic issues and ensure your luxury sedan performs as its engineers intended for years to come.
Frequently Asked Questions
Do I need to do any additional programming after I receive it?
No. This ECM is a complete plug-and-drive solution. We program it using your VIN before shipping, so it’s ready for installation right out of the box. In some cases, a security relearn procedure may be required, which is a simple process that can be done without special tools.
How do I provide my vehicle’s VIN?
Please enter your 17-digit Vehicle Identification Number (VIN) in the designated field during checkout. You can also send it to us with your order number after purchase. We cannot ship your part until we receive the VIN.
Will this fix my car’s specific problem?
This module will resolve any issue directly caused by a faulty ECM. While the symptoms listed are common indicators of ECM failure, we always recommend having a qualified mechanic perform a thorough diagnosis to rule out other potential causes, such as wiring or sensor faults.
Is this the correct part for my vehicle?
This 2009-2010 Cadillac STS Engine Control Module is a direct replacement for service number 12678512 and the other interchangeable numbers listed. It also fits a wide range of other GM vehicles. Please review the detailed fitment list on this page to confirm compatibility with your specific make, model, and engine.
Is there a core charge for my old part?
No, there is no core charge associated with this purchase. You are not required to send your old ECM back to us, making for a simpler, faster transaction.