Is Your Cadillac or GM Vehicle Running Rough?
If your 2004-2007 Cadillac CTS, SRX, or other compatible GM vehicle is suffering from perplexing issues like random stalling, poor fuel economy, a no-start condition, or a persistent Check Engine Light, the root cause may be a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, responsible for managing everything from fuel injection and ignition timing to emissions controls. When it fails, it can create a cascade of problems that are often difficult to diagnose.
This listing is for a genuine, used GM ECM, part number 12592124. We take the guesswork and high cost out of the repair process. Each module is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that the computer has the latest software updates from GM and is perfectly matched to the options and systems in your car, making for a straightforward installation.
From the Diagnostic Bay
We had a 2006 Cadillac SRX with the 3.6L V6 come in on a tow truck. The customer said it would run fine for 15 minutes, then suddenly die and refuse to restart for an hour. There were no consistent trouble codes, just a few random communication errors. After checking all the basics—fuel pressure, spark, and sensor data—we noticed the 5-volt reference signal would drop out right before the engine stalled. This pointed directly to an internal failure in the ECM. We installed one of our VIN-programmed modules, performed the security relearn, and the vehicle ran perfectly. It’s a classic example of how a failing ECM can create ghost-like problems that a simple part swap can solve.
Common Symptoms of a Failing ECM
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, it might be time to replace your ECM:
- ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Misfire codes even after replacing spark plugs and coils.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Communication errors with diagnostic scan tools.
The Solution: A Pre-Programmed 2004-2007 CTS ECM
Replacing the ECM on these vehicles isn’t as simple as just swapping the part. A new or used module must be programmed to work with your specific car. Our service eliminates the need for an expensive trip to the dealership. Simply provide us with your VIN during checkout, and our technicians will flash this module with the correct GM-certified software for your vehicle. This makes the installation process as close to plug-and-play as possible. This unit is a direct replacement for service numbers 12581144, 12588472, 12592124, and 19260507.
Vehicle Fitment:
This module is compatible with a range of GM vehicles equipped with the 3.6L V6 engine. Please verify your part number before ordering. Key applications include:
- Cadillac CTS: 2004-2007 (Base models)
- Cadillac SRX: 2004-2006 (3.6L)
- Buick Allure: 2005-2008 (3.6L)
- Buick LaCrosse: 2005-2008 (3.6L)
- Buick Rendezvous: 2004-2006 (3.6L)
Frequently Asked Questions
Do I need to have this ECM programmed by a dealer?
No. The main benefit of our service is that we program the module to your vehicle’s VIN before we ship it to you. This saves you the time, hassle, and expense of a dealership visit.
What is a VIN and where do I find it?
The VIN is your vehicle’s unique 17-digit identification number. You can typically find it on a plate on the driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this a new part?
This is a high-quality, tested, used OEM part sourced from a salvaged vehicle. Each unit is inspected to ensure it is fully functional before being programmed and shipped.
What happens if I forget to provide my VIN?
We cannot ship your part without a VIN. Programming is a required step for this module to function in your vehicle. If you forget to add it during checkout, we will contact you to get the information, which may delay your order.
Will I need to do anything after installation?
After installing the ECM, you will likely need to perform a security relearn procedure (also known as a Passlock or anti-theft relearn). This procedure is simple, requires no special tools, and typically involves a sequence of turning the key in the ignition. Instructions are widely available online for your specific model.
How do I know this part will fit my car?
This ECM fits several GM models. The best way to ensure compatibility is to match the part number (12592124) or one of the compatible service numbers (12581144, 12588472, 19260507) with the one on your current module. Providing your VIN allows us to double-check the fitment for you.