Restore Peak Performance to Your GM Vehicle
Is your 2004-2006 Cadillac SRX, CTS, or Buick Rendezvous suffering from perplexing engine issues? Unexplained stalling, rough idling, a persistent Check Engine Light, or a complete no-start condition can often be traced back to a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, and when it malfunctions, it can cause a cascade of problems. This listing is for a genuine, used GM Engine Control Module, part number 12592124, which serves as a direct replacement for several service numbers, including 12581144, 12588472, and 19260507.
The Plug-and-Play Solution You Need
Replacing an ECM isn’t just about swapping hardware. Modern vehicles require the module to be specifically programmed to the car’s unique Vehicle Identification Number (VIN). This critical step ensures all systems communicate correctly and that the vehicle’s anti-theft system functions as intended. We take the guesswork and expensive dealership visits out of the equation. Simply provide us with your vehicle’s VIN after purchase, and our technicians will flash this ECM with the latest GM-certified software for your exact make and model. This ensures a seamless installation process, getting you back on the road faster.
From the Diagnostic Bay
We recently had a 2005 Cadillac SRX with the 3.6L V6 come in on a tow truck. The owner had replaced the spark plugs, ignition coils, and even the fuel pump trying to solve an intermittent stalling and hard-starting issue. The codes were all over the place—misfires, communication errors, O2 sensor faults. After hours of chasing ghosts, we hooked up our scope to the ECM’s main power and ground circuits. We found a fluctuating voltage signal from the ECM itself, indicating an internal failure. A new, properly programmed 2004-2006 SRX ECM solved every single issue. It’s a powerful reminder that the ECM governs everything, and when it fails, it can mimic a dozen other problems.
Is a Failing ECM Causing Your Problems?
A faulty engine computer can manifest in numerous ways, often making diagnosis difficult. If you’re experiencing any of the following symptoms, a failing ECM could be the culprit. This replacement 2004-2006 SRX ECM is designed to resolve these common issues.
- ✔ Persistent Check Engine Light (CEL) with various, often inconsistent, trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough or erratic engine idling.
- ✔ Poor acceleration and overall loss of power.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Problems with automatic transmission shifting.
Guaranteed Compatibility and Fitment
This ECM is a tested, functional component sourced from a salvaged vehicle. It is guaranteed to be compatible with a range of GM vehicles equipped with the 3.6L V6 engine. Please verify that your vehicle is on the list below and that your original part number is one of the compatible service numbers (12581144, 12588472, 12592124, 19260507).
- Cadillac SRX: 2004-2006 (3.6L)
- Cadillac CTS: 2004-2007 (Base)
- Buick Allure: 2005-2008 (3.6L)
- Buick LaCrosse: 2005-2008 (3.6L)
- Buick Rendezvous: 2004-2006 (3.6L)
Installation is straightforward for a knowledgeable DIYer or any professional mechanic. The module is typically located in the engine compartment. Always disconnect the battery before beginning work. After installation, some vehicles may require a Crankshaft Variation Relearn (CASE Relearn) procedure, which can be performed with a compatible high-level scan tool.
Frequently Asked Questions
What exactly is an ECM?
The Engine Control Module (ECM) is a powerful computer that acts as the ‘brain’ of your engine. It receives data from sensors all over the vehicle and uses it to control fuel injection, ignition timing, emissions systems, and more to ensure optimal performance and efficiency.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for programming the ECM. It contains specific information about your car’s engine, transmission, and factory options. Programming the ECM to your VIN ensures all systems work together correctly and that the vehicle’s security system recognizes the new module.
Is this part ready to install when I receive it?
Yes! Once we program the module with the VIN you provide, it is ready for installation. In some cases, an additional procedure like a CASE relearn may be needed after installation, which requires a specific scan tool.
Where is the ECM located on my 2005 Cadillac SRX?
On the 2004-2006 Cadillac SRX, the ECM is located in the right-hand (passenger side) front of the engine compartment. Always consult a service manual for your specific vehicle to confirm the location and proper removal procedure.
What happens if I install this without programming?
If you install an unprogrammed ECM, your vehicle will most likely not start. The internal anti-theft system will not recognize the module, and the engine parameters will not match your vehicle’s requirements, preventing it from running.
Is this a new part?
No, this is a genuine, used OEM part that has been carefully removed from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.