Is Your Cadillac STS Running Rough or Stalling?
The Engine Control Module (ECM) is the central computer of your 2006 Cadillac STS, responsible for managing everything from fuel injection and ignition timing to transmission shifts and emissions control. When it begins to fail, it can cause a wide range of frustrating and difficult-to-diagnose issues, leaving your luxury vehicle feeling unreliable. This direct-fit Engine Control Module, part number 19210737, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency.
This isn’t just a replacement part; it’s a complete service. We program the module specifically for your vehicle using your VIN number. This ensures that it arrives with the latest GM factory software updates, correcting common drivability issues and optimizing performance. By providing your VIN at checkout, you receive a unit that is ready for installation, saving you a costly trip to the dealership for programming.
From the Diagnostic Bay
We had a 2006 STS-V with the 4.4L supercharged engine come into the shop with a maddening intermittent stalling issue. The owner said it would run perfectly for 20-30 minutes, but then die at a stoplight and refuse to restart for an hour. There were no consistent trouble codes, just a history of random communication faults. After checking fuel pressure, wiring, and grounds, we suspected the ECM was failing under heat. We installed one of these VIN-programmed modules, and the problem vanished. The original ECM had an internal processor fault that only appeared when it reached operating temperature. This simple swap saved the customer from weeks of guesswork and restored his confidence in his car.
Symptoms of a Failing Engine Control Module
- ✔ Check Engine Light is illuminated with various, often inconsistent, trouble codes.
- ✔ Engine cranks but refuses to start, or experiences very hard starting.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough or erratic idling and stalling, especially when warm.
- ✔ Hesitation or stumbling during acceleration.
- ✔ Automatic transmission shifting issues or harsh engagement.
- ✔ Failure to pass state emissions testing.
Solving 2006 STS Engine Module Failures
A failing 2006 STS Engine Module can be a major headache, but the solution is straightforward. This unit is a guaranteed fix for issues stemming from a faulty computer. It directly replaces a wide range of original GM service numbers, including 12590032, 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737, making it a versatile solution for many GM vehicles from this era. Our VIN programming process ensures that all specific options and parameters for your vehicle are correctly loaded, making installation as simple as possible.
Installation Note: For a 2006 Cadillac STS, the ECM is typically located on the left-hand (driver’s side) frame rail. Always disconnect the battery before attempting to replace any electronic module. While this module is programmed for your vehicle, some applications may require a security relearn procedure or a Crankshaft Position Sensor (CASE) relearn after installation. These procedures can often be performed with a capable bi-directional scan tool and are necessary for the engine to run correctly.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to access the exact factory calibration file for your specific vehicle. This includes engine type, transmission, emissions equipment, and other options. Programming the module with this file ensures it works seamlessly with your car, just like the original, and includes the latest software updates from GM.
Is this a plug-and-play part?
For most vehicles, yes. Because we pre-program it to your VIN, it eliminates the need for dealer programming. However, depending on your vehicle’s specific anti-theft system, you may need to perform a simple key relearn or security relearn procedure. Some vehicles may also require a CASE relearn for optimal performance.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty ECM, then yes, this part will resolve the issue. It’s crucial to properly diagnose the problem first, as the check engine light can be triggered by many other components, such as sensors or wiring faults.
What is the difference between an ECM and a PCM?
The terms are often used interchangeably. ECM stands for Engine Control Module, while PCM stands for Powertrain Control Module. A PCM controls both the engine and the transmission, while an ECM typically just controls the engine. In most modern vehicles, including your STS, the unit is a PCM, but it is commonly referred to as an ECM.
Does this part fit other vehicles besides the 2006 STS?
Yes, this ECM is compatible with a very wide range of GM vehicles, including models from Chevrolet, Pontiac, Buick, Saturn, and more. Please refer to the detailed fitment list on this page and verify that your original part number is listed as an interchangeable service number to ensure compatibility.