Is Your GM Vehicle Plagued by Engine Problems?
If your Cadillac, Buick, or Pontiac is suddenly stalling, refusing to start, showing a persistent Check Engine Light, or suffering from poor fuel economy and rough idling, the problem often points directly to a failing Engine Control Module (ECM). As a technician with over two decades of experience under the hood, I’ve seen how a faulty ECM can turn a reliable car into a source of constant frustration. The ECM is the brain of your engine, and when it malfunctions, the entire system is compromised.
The Smart, Reliable Solution: A VIN-Programmed OEM Module
This isn’t just a replacement part; it’s a complete, ready-to-install solution. You’re getting a genuine, used GM Engine Control Module, part number 12592124, that has been meticulously tested and sourced from a salvaged vehicle. The critical difference is our service: before this ECM ships, we will program it with the very latest GM software updates, specifically matched to your vehicle’s VIN. This eliminates the need for an expensive trip to the dealership for programming, saving you time and hundreds of dollars.
Expert Pro Tip: Check Your Connectors Before Installation
Over the years, I’ve seen countless modules returned as ‘defective’ when the real issue was a poor connection. Before you install your replacement ECM, take a bright flashlight and carefully inspect the pins inside the vehicle’s wiring harness connectors. Look for any signs of green or white corrosion, or any pins that look bent or pushed back into the connector. Use a small pick or terminal cleaning tool to gently scrape away any corrosion and ensure every pin is straight. A clean, solid connection is absolutely essential for the module to function correctly.
Diagnosing and Fixing with a 2004-2007 CTS ECM
A failing ECM can manifest in various ways, often mimicking other component failures. If you’re experiencing any of the following, this module is the likely fix:
- โ Unexplained Check Engine Light (with various communication or sensor codes)
- โ Engine stalling or cutting out while driving
- โ Complete no-start condition where the engine cranks but won’t fire
- โ Noticeable decrease in fuel efficiency
- โ Rough or erratic engine idle
- โ Transmission shifting problems or harsh shifts
- โ Communication errors with diagnostic scan tools
Simple Installation Process: Get Back on the Road Fast
Installing your pre-programmed 2004-2007 CTS ECM is a straightforward process that a confident DIYer can handle. While the exact location varies by model, the steps are generally similar.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the ECM: On a Cadillac CTS or SRX, it’s typically in the engine compartment on the right-hand (passenger) side. On a Buick Allure or LaCrosse, it’s often found under the air cleaner housing. For a Rendezvous, check the left-hand (driver) side of the engine bay. Always confirm the location for your specific model.
- Disconnect Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the old ECM. Do not force them.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. There are typically a few 10mm bolts holding it in place.
- Install the New Module: Mount your replacement ECM securely onto the bracket and reconnect the electrical harnesses. You should feel a solid ‘click’ as they lock into place.
- Reconnect Battery: Re-attach the negative battery terminal. Your vehicle is now ready to start with its newly programmed brain. No further programming is required.
Guaranteed Compatibility and Fitment
This module is a direct replacement for several service part numbers, ensuring wide compatibility. Your vehicle is compatible if it requires part number 12592124 or any of the following interchangeable numbers: 12581144, 12588472, or 19260507.
This part is confirmed to fit the following vehicles:
- Cadillac CTS: 2004-2007 (Base models)
- Cadillac SRX: 2004-2006 (3.6L)
- Buick Allure: 2005-2008 (3.6L)
- Buick LaCrosse: 2005-2008 (3.6L)
- Buick Rendezvous: 2004-2006 (3.6L)
After your purchase, simply send us a message with your 17-digit VIN, and we’ll handle the rest. Restore your vehicle’s performance and reliability today.