Is Your Cadillac, Buick, or SRX Running Rough?
If you’re dealing with frustrating issues like stalling at stoplights, erratic shifting, a persistent Check Engine Light, or a car that just won’t start, a failing Engine Control Module (ECM) is often the culprit. In my 20+ years as a technician, I’ve seen these symptoms countless times. The ECM is the brain of your engine, and when it starts to fail, it can cause a cascade of problems that are impossible to ignore. You need a reliable solution that gets you back on the road without the astronomical cost and hassle of a dealership visit.
The Direct-Fit Solution for Your Vehicle
This is a thoroughly tested, used OEM Engine Control Module, part number 12592124, that serves as a direct replacement for several GM vehicles. The biggest advantage? We professionally program it to your vehicle’s specific VIN before it ships. This means it arrives ready for a straightforward installation, saving you from expensive dealer programming fees and towing costs. It’s the most efficient way to restore your vehicle’s original performance and reliability.
Expert Pro Tip: Check Before You Replace
Before you’re certain your ECM is faulty, take a moment to inspect the electrical connectors on your old module. Over the years, I’ve seen dozens of cases where the actual problem was corrosion or a bent pin inside the connector, not the module itself. Unplug the harnesses (with the battery disconnected!) and use a flashlight to look for any green or white crusty buildup or any pins that look pushed back or bent. Cleaning the terminals with a dedicated contact cleaner can sometimes solve the issue entirely. It’s a 5-minute check that could save you time and money.
Common Symptoms of a Failing 2004-2007 CTS ECM:
- ✔ Unexplained Check Engine Light (CEL)
- ✔ Engine stalling or cutting out while driving
- ✔ Complete no-start condition
- ✔ Poor fuel economy
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Misfire codes that don’t resolve with new plugs or coils
Plug-and-Play Installation: No Dealer Visit Required
Installing your pre-programmed module is a job most DIYers can handle. Here’s a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for capacitors to discharge.
- Locate the ECM: On most of these models, the ECM is found in the engine compartment. For the CTS and SRX, it’s typically on the right-hand (passenger) side. For the Buick models, it’s often under the air cleaner housing.
- Disconnect Harnesses: Carefully release the locking tabs on the electrical connectors and unplug them from the old ECM. Inspect them for damage or corrosion as mentioned in our Pro Tip.
- Swap the Module: Unbolt the old ECM from its mounting bracket and remove it. Secure the new, pre-programmed module in its place.
- Reconnect & Finalize: Plug the electrical harnesses firmly into the new ECM until they click. Reconnect the negative battery terminal. The vehicle may require a security relearn procedure, which can typically be done by cycling the key and is detailed in many online forums for your specific model.
Guaranteed Compatibility
This module is a direct replacement for units with service numbers 12581144, 12588472, 12592124, or 19260507. It is guaranteed to fit and function in the following vehicles:
- 2004-2007 Cadillac CTS (Base models)
- 2004-2006 Cadillac SRX (3.6L)
- 2005-2008 Buick Allure (3.6L)
- 2005-2008 Buick LaCrosse (3.6L)
- 2004-2006 Buick Rendezvous (3.6L)
After purchase, simply reply to your order confirmation email with your vehicle’s 17-digit VIN. We’ll handle the programming with the latest GM software updates and ship your ready-to-install ECM directly to you.