Is Your Buick or Cadillac Running Rough?
If your 2004-2006 Buick Rendezvous, Cadillac CTS, SRX, or other compatible GM vehicle is experiencing perplexing issues like stalling, erratic shifting, a persistent check engine light, or a complete no-start condition, the culprit is often a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, managing everything from fuel injection and ignition timing to emissions controls. When it begins to fail, it can cause a cascade of problems that are difficult to diagnose and can leave you stranded. Don’t let a faulty computer dictate your vehicle’s reliability. This is your direct, effective solution.
From the Diagnostic Bay
We had a 2005 Cadillac SRX with the 3.6L V6 come into the shop on a tow truck. The owner had already replaced the throttle body, all six spark plugs, and the mass air flow sensor trying to chase down an intermittent stalling and ‘Reduced Engine Power’ message. The codes were all over the place—communication errors, sensor circuit faults—a classic sign of a confused computer. After confirming all the wiring and sensors were good, we pinpointed the ECM. We installed a VIN-programmed unit just like this one, performed the security relearn, and the car fired up and ran perfectly. The owner had spent hundreds on parts he didn’t need, when the core issue was the ECM itself. It’s a common story we see with these vehicles.
Direct Solution for Your 2004-2006 Rendezvous ECM
This listing is for a genuine, used GM Engine Control Module, part number 12592124. Sourced from a salvaged vehicle and thoroughly tested for functionality, this ECM is a reliable and cost-effective alternative to a costly new unit from a dealership. The most critical service we provide is programming this module specifically to your vehicle’s Vehicle Identification Number (VIN) before it ships. This ensures that when you receive the part, it has the correct software and calibrations for your exact make, model, and options, making installation as straightforward as possible.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
- ✔ Engine performance issues such as misfiring, hesitation, or poor fuel economy.
- ✔ Intermittent or complete no-start conditions where the engine cranks but won’t fire.
- ✔ Transmission shifting problems, including harsh shifts or getting stuck in gear.
- ✔ ‘Reduced Engine Power’ message appearing on the dashboard.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Unexplained stalling while driving or at idle.
Why VIN Programming is Essential
Modern vehicles use complex software that is tailored to their specific VIN. You cannot simply swap an ECM from another vehicle and expect it to work. The VIN programming process loads the latest GM-approved software and vehicle-specific parameters onto the module. This step is crucial for proper engine and transmission function, anti-theft system operation, and emissions compliance. By providing us with your VIN at checkout, you eliminate the need for expensive programming tools or a trip to the dealer. We handle the complex part so you can get back on the road faster.
Part Number Compatibility
This ECM, part number 12592124, is a direct replacement for several service numbers. If your original module has one of the following numbers, this part is compatible:
- 12581144
- 12588472
- 12592124
- 19260507
Vehicle Fitment Guide
This module is confirmed to fit the following vehicles. Please verify your vehicle and engine options match the description below:
- Buick Allure: 2005-2008 (3.6L Engine)
- Buick LaCrosse: 2005-2008 (3.6L Engine)
- Buick Rendezvous: 2004-2005 (with ID 19260507)
- Buick Rendezvous: 2006 (3.6L Engine)
- Cadillac CTS: 2004-2007 (Base models, check ID)
- Cadillac SRX: 2004-2006 (3.6L Engine)
This is a reliable, tested component ready to solve your vehicle’s electronic issues. By purchasing a pre-programmed 2004-2006 Rendezvous ECM, you are choosing a smart, efficient repair path that saves you time and money.
Frequently Asked Questions
Do I need to do any programming myself?
No. We program the module to the VIN you provide before shipping. In most cases, you may only need to perform a simple ‘Security Relearn’ or ‘Key Relearn’ procedure, which can typically be done without special tools and takes about 30 minutes. Instructions are widely available online for this process.
Is this a new part?
No, this is a high-quality, tested, and fully functional used part recovered from a salvaged vehicle. This allows us to offer a reliable solution at a fraction of the cost of a new module.
How do I provide my VIN?
After you complete your purchase, please send us a message with your vehicle’s 17-digit VIN. We cannot ship your order until we receive this information, as the programming is a required step.
What if my original part number isn’t 12592124?
This module is a direct replacement for several part numbers, including 12581144, 12588472, and 19260507. As long as your original module carries one of these numbers, this part will work correctly once programmed.
What is your warranty policy on this part?
This part comes with our standard warranty covering functionality upon arrival. Please review our store’s warranty policy page for complete details and conditions.