Restore Peak Performance to Your 2006 Cadillac STS
Is your 2006 Cadillac STS plagued by baffling engine problems, a persistent Check Engine light, or a noticeable decline in performance? The Engine Control Module (ECM) is the sophisticated brain of your vehicle, and when it falters, it can cause a cascade of frustrating issues. This professionally programmed Engine Control Module is the definitive, reliable solution to restore the smooth power, sharp response, and flawless operation you expect from your luxury sedan.
Common Symptoms of a Failing 2006 STS ECM & Your Solution
A failing ECM can manifest in numerous ways, often mimicking other component failures and leading to costly, incorrect repairs. If you’re experiencing any of the following, this module is your answer:
- Unexplained Stalling or Rough Idle: The engine stutters, runs poorly, or shuts off unexpectedly.
- No-Start Condition: The engine cranks but refuses to start, despite a good battery and fuel supply.
- Poor Fuel Economy: A sudden, unexplained drop in your vehicle’s MPG.
- Erratic Transmission Shifting: Harsh shifts, delayed engagement, or getting stuck in gear due to incorrect signals from the ECM.
- Check Engine Light with Communication Codes: Diagnostic Trouble Codes (DTCs) like U0100 (Lost Communication With ECM/PCM) or various sensor circuit faults that don’t resolve after replacing the sensor.
Instead of chasing symptoms, this programmed 2006 Cadillac STS engine control module directly addresses the root cause, providing a lasting and effective repair.
Features & Benefits
- ✔ VIN-Programmed for Your Cadillac: We flash this module with your vehicle’s specific VIN and the latest GM software updates, ensuring perfect compatibility and optimal performance right out of the box.
- ✔ Direct-Fit Replacement: Engineered to meet or exceed original equipment specifications for a seamless installation, this module is a direct replacement for service number 12603530 and a wide range of other compatible part numbers.
- ✔ Solve Complex Engine Problems: Eliminates common issues caused by a failing ECM, including rough running, stalling, communication errors, and false sensor codes.
- ✔ Restored Performance & Efficiency: Regain the smooth power delivery and fuel economy you expect from your Cadillac by restoring precise control over your engine’s functions.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: A client with a 2006 STS 4.4L V8 was at their wit’s end. They were dealing with intermittent stalling and a transmission that shifted erratically. They had already replaced several sensors without success. The real issue was a failing ECM causing communication breakdowns on the vehicle’s network. Installing our programmed 2006 Cadillac STS engine control module didn’t just fix the problem—it restored the car’s entire personality. The crisp shifts returned, the engine idled perfectly, and the owner got their luxury performance sedan back. This isn’t just a part; it’s a solution.
Frequently Asked Questions
Is any additional programming required after installation?
No. This ECM arrives pre-programmed to the VIN you provide, along with the latest GM updates. In most cases, it is a direct installation. However, some vehicles may require a security relearn or crankshaft variation relearn procedure, which can be performed with a capable scan tool.
How do I provide my Vehicle Identification Number (VIN)?
After completing your purchase, simply send us a message with your 17-digit VIN. We cannot ship your part until we receive this information, as it is essential for programming the module correctly for your specific 2006 Cadillac STS.
Will this fix my specific problem?
This ECM is the solution for a wide range of electronic and performance issues. While it is a common failure point, we always recommend having a professional diagnosis performed to confirm that the ECM is the cause of your vehicle’s symptoms before purchasing.
What service numbers does this ECM replace?
This module is a direct replacement for service number 12603530 and is also interchangeable with 12590032, 12602044, 12605843, 12607096, 12630457, and 19210737, among others listed in the fitment chart.
Do I need to send my old part back?
No core charge is required for this part. You do not need to return your old, faulty engine control module to us.