Is Your Buick Rendezvous Running Rough? It Could Be The ECM.
If you’re experiencing frustrating issues like stalling, a persistent check engine light, poor fuel economy, or a no-start condition in your 2004-2006 Buick Rendezvous, the Engine Control Module (ECM) is a primary suspect. As the central computer for your vehicle’s engine, the ECM is responsible for managing everything from fuel injection and ignition timing to emissions control. When it fails, the symptoms can be widespread and difficult to diagnose, often leading to costly and unnecessary repairs. This genuine, used ECM, part number 12592124, is the reliable and cost-effective solution to restore your vehicle’s performance and dependability.
From the Diagnostic Bay
We once had a 2005 Buick LaCrosse with the 3.6L V6 come in on a tow truck. The owner had already replaced the fuel pump, spark plugs, and a couple of sensors trying to chase down an intermittent stalling issue. The check engine light was on, but the codes were all over the place—misfires, O2 sensor faults, and even a communication error. After checking the wiring harness for damage, we connected our scope to the injector and coil control wires at the ECM. We found that the signals were dropping out randomly. We swapped in a known-good, programmed ECM, and the engine fired up and ran perfectly. The original ECM had an internal failure that only showed up when it was warm, causing the owner weeks of headaches. This highlights how a faulty module can mimic many other problems.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is on or flashes intermittently
- ✔ Engine stalling or shutting off while driving
- ✔ Difficulty starting the engine or a complete no-start condition
- ✔ Noticeable decrease in fuel efficiency
- ✔ Rough idling or poor engine performance
- ✔ Hesitation or stumbling during acceleration
- ✔ Transmission shifting issues or erratic behavior
- ✔ Communication errors with diagnostic scan tools
The Direct-Fit Solution: A Programmed 2004-2006 Rendezvous ECM
Don’t let a faulty computer keep you off the road. This replacement ECM is a genuine part sourced from a salvaged vehicle, ensuring OEM quality and fitment. The key benefit of our service is the pre-shipment programming. When you place your order, you will provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then flash the module with the latest GM-certified software specific to your exact vehicle. This critical step ensures that the ECM communicates correctly with your vehicle’s other modules, such as the Body Control Module (BCM) and Transmission Control Module (TCM), right out of the box.
This process eliminates the need for expensive programming at a dealership or specialized repair shop, saving you time and money. While the module comes programmed to your VIN, please be aware that a security relearn procedure (often called a VATS or Passlock relearn) may be necessary after installation. This is a simple procedure that can typically be done in your driveway without any special tools and involves a sequence of key turns. Instructions for this are widely available online or in your vehicle’s service manual.
Guaranteed Compatibility
This ECM, identified by part number 12592124, is a direct replacement for several service numbers, including 12581144, 12588472, and 19260507. It is confirmed to fit the following vehicles:
- Buick Allure: 2005-2008 (3.6L)
- Buick LaCrosse: 2005-2008 (3.6L)
- Buick Rendezvous: 2004-2006 (3.6L)
- Cadillac CTS: 2004-2007 (Base)
- Cadillac SRX: 2004-2006 (3.6L)
Please verify that your original module carries one of the compatible service numbers to ensure a perfect match for your vehicle. This is the most effective way to solve your engine management problems and get your car running smoothly again.
Frequently Asked Questions
Do I need to do anything after installing this ECM?
Yes. While we program the module to your VIN, you will likely need to perform a security relearn procedure (VATS/Passlock). This syncs the new ECM with your vehicle’s anti-theft system and typically takes 10-30 minutes using just your ignition key.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot ship the part until we receive and program it with your VIN.
Is this a new part?
No, this is a genuine, used OEM part that has been carefully removed from a salvaged vehicle. It has been tested to ensure it is fully functional and ready for programming.
Will this fix my check engine light?
If the check engine light and other symptoms are caused by a faulty ECM, this part will resolve the issue. However, it’s crucial to ensure your vehicle has been properly diagnosed, as other failing sensors or wiring issues can cause similar symptoms.
Does this part come with a warranty?
Yes, all our parts come with a standard warranty. Please check the warranty information section on this page for specific details and duration.