Is Your Buick Rendezvous Running Rough, Stalling, or Showing a Check Engine Light?
If you’re dealing with frustrating engine problems like erratic idling, poor fuel economy, or a complete no-start situation, a failing Engine Control Module (ECM) is often the culprit. As the brain of your vehicle’s engine, when the ECM falters, it can create a cascade of confusing and costly issues. This isn’t just an inconvenience; it’s a critical failure that sidelines your vehicle. We offer a reliable, straightforward solution to get you back on the road with confidence.
“A customer’s 2005 Rendezvous came into my shop last month with a persistent random misfire code (P0300) that just wouldn’t clear. They had already replaced the spark plugs, ignition coils, and even the fuel injectors. After hooking up my scope, I could see the injector driver signal for cylinder 3 was dropping out intermittently directly from the ECM. The module itself was failing internally. We installed one of our VIN-programmed units, and the vehicle has run perfectly ever since. It’s a classic case where chasing parts gets expensive, but diagnosing the core problem provides the real fix.”
The Smart Solution: A Pre-Programmed, Direct-Fit ECM
This is a thoroughly tested, used OEM Engine Control Module that is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the computer communicates flawlessly with your Rendezvous’s existing systems, just as it did from the factory. We install the latest GM software updates, which can resolve operational bugs and improve performance over the original programming.
Common Symptoms of a Failing Rendezvous ECM:
- โ Persistent Check Engine Light (CEL) with various codes
- โ Engine stalling or shutting off while driving
- โ No-start or hard-starting conditions
- โ Noticeable decrease in fuel efficiency
- โ Rough or unstable engine idle
- โ Communication errors with diagnostic scan tools
- โ Unexplained transmission shifting problems
Why Choose Our 2004-2006 Rendezvous ECM?
Forget expensive dealership visits and the hassle of finding a shop with the right programming equipment. We handle the complex part for you. By providing your VIN during checkout, you receive a module that is truly plug-and-play. This unit is a direct replacement for service numbers 12581144, 12588472, 12592124, and 19260507, ensuring broad compatibility.
Expert Pro Tip: Inspect Your Connectors!
Before installing your replacement ECM, take a moment to closely inspect the vehicle’s wiring harness connectors. Look for any signs of green or white corrosion on the pins, or any bent or damaged pins. A poor connection is a leading cause of repeat ECM failure. Use a dedicated electronics cleaner and a small brush to gently clean the terminals to ensure a perfect, lasting connection.
Plug-and-Play Installation: No Dealer Visit Required
Installing your programmed module is a straightforward process that you can do at home with basic tools. Hereโs a general guide:
- 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 side), often near the firewall or inner fender.
- Disconnect the Harness: Carefully release the locking tabs on the electrical connectors and pull them straight off the old module. Do not force them.
- Remove the Old Module: Unbolt the mounting hardware holding the original ECM in place and remove it from the vehicle.
- Install the New Module: Mount your replacement ECM in the same location and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harness connectors into the new module until they click into place. Reconnect the negative battery terminal.
- Final Step: Your vehicle is now ready to start. The security system may require a simple relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes.
Guaranteed Fitment
This module is a confirmed fit for the following vehicles with the specified options. Please match your part number or contact us with your VIN to confirm compatibility.
- Buick Allure: 2005-2008 (3.6L)
- Buick LaCrosse: 2005-2008 (3.6L)
- Buick Rendezvous: 2004-2006 (3.6L, ID 19260507 or 12592124)
- Cadillac CTS: 2004-2007 (Base, ID 19260507 or 12592124)
- Cadillac SRX: 2004-2006 (3.6L)