Is Your Buick Rendezvous Running Rough, Stalling, or Not Starting at All?
As a technician with over two decades of experience under the hood, I’ve seen countless drivers frustrated by mysterious engine problems. You might be experiencing a persistent Check Engine Light, sudden stalling at intersections, terrible fuel mileage, or a vehicle that just won’t fire up. Often, the root cause isn’t a faulty sensor or fuel pump—it’s the Engine Control Module (ECM), the computer that serves as your vehicle’s brain. When it fails, the entire system can go haywire. This is the reliable, cost-effective solution you’ve been searching for.
The Direct Solution: A VIN-Programmed Engine Computer
This isn’t just a used part pulled from a yard. This is a genuine OEM Engine Control Module, part number 12592124, that we meticulously program to your vehicle’s specific Vehicle Identification Number (VIN) before it ever leaves our facility. We load it with the latest software updates directly from GM, ensuring it communicates flawlessly with your Rendezvous’s systems right out of the box. This critical programming step means you can avoid a costly trip to the dealership and the hassle of finding a shop with the right equipment.
✔ From the Shop Floor: A Real-World Diagnosis
“A customer’s 2005 Rendezvous came in last week with these exact symptoms: it would crank strong but wouldn’t start, and the dash was lit up with random warning lights. They had already replaced the battery and the crank sensor with no luck. A quick diagnostic scan showed a U-series code, indicating a loss of communication with the ECM. Instead of hours of chasing wires, we installed one of our VIN-programmed modules. The vehicle fired up on the first try and ran perfectly. This is a classic case where the central computer is the problem, not the parts it controls.”
Common Symptoms of a Failing 2004-2006 Rendezvous ECM:
- ✔ Engine stalling or cutting out while driving
- ✔ Complete no-start or crank-no-start condition
- ✔ Persistent and un-clearable Check Engine Light
- ✔ Poor or erratic automatic transmission shifting
- ✔ Drastically reduced fuel economy
- ✔ Communication error codes with a diagnostic scanner
- ✔ Misfire codes even after replacing plugs and coils
Plug-and-Play Installation: No Dealer Visit Required
We’ve made this process as simple as possible for the DIY mechanic or your trusted local shop. Because the module arrives pre-programmed for your exact vehicle, the installation is straightforward.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the ECM: On the 2004-2006 Rendezvous, the ECM is typically found in the engine compartment on the driver’s side (LH), often near the air filter housing.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. Use a small screwdriver to gently release the locking tabs if necessary. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new ECM into place and securely reconnect the wiring harnesses. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Start the Vehicle: Your vehicle is now ready to run with its newly programmed ECM. In some cases, a security relearn procedure may be necessary, which can typically be done without special tools.
Guaranteed Compatibility
This ECM, identified by part number 12592124, is a direct replacement for several GM service numbers. If your original module has any of the following numbers, this part is a compatible replacement: 12581144, 12588472, 12592124, or 19260507. It is engineered to fit a range of GM vehicles, including specific years of the Cadillac CTS, Cadillac SRX, Buick Allure, and Buick LaCrosse, primarily with the 3.6L engine. By providing your VIN, you guarantee we send you a perfectly matched and programmed computer for your exact build.