Restore Peak Performance to Your GM Vehicle
Is your Cadillac CTS, SRX, or Buick running poorly? Experiencing a persistent Check Engine Light, rough idling, or even a no-start condition? These are classic signs of a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, managing everything from fuel injection and ignition timing to emissions controls. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose problems. This genuine used GM ECM, part number 12592124, is the definitive solution to get your vehicle running smoothly again.
We had a 2006 Cadillac SRX come into the shop with an intermittent stalling issue that no one could figure out. The customer had replaced the fuel pump and multiple sensors, but the problem persisted. After hooking up our diagnostic scanner, we noticed the live data stream from the ECM would occasionally drop out completely just before a stall. There were no specific codes pointing to the module itself, just a collection of communication errors. We swapped in a VIN-programmed ECM like this one, performed the security relearn, and the problem was solved instantly. It’s a reminder that a faulty computer can create phantom symptoms that lead you down expensive, incorrect diagnostic paths.
Is Your Vehicle Showing Signs of ECM Failure?
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, a faulty ECM could be the culprit. This Cadillac CTS ECM is designed to resolve these common issues:
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine stalling or shutting off unexpectedly while driving
- ✔ No-start or hard-start conditions, especially when the engine is warm
- ✔ Noticeable decrease in fuel economy
- ✔ Rough or erratic engine idle
- ✔ Hesitation or stumbling during acceleration
- ✔ Transmission shifting problems or harsh shifts
- ✔ Communication errors with diagnostic scan tools
The Power of VIN-Specific Programming
Don’t settle for a generic, unprogrammed module that requires an expensive trip to the dealership. The single most important benefit of this ECM is that we program it specifically for your vehicle using your VIN before it ships. This process ensures that the module has the correct software and calibrations for your car’s specific options and emissions equipment. We flash it with the latest updates available from General Motors, which can resolve known bugs and improve overall performance and reliability. This plug-and-play approach saves you time, money, and the headache of coordinating with a dealer for programming services.
Guaranteed Fitment and Compatibility
This ECM is a direct replacement for several GM service numbers, ensuring broad compatibility. Please verify that your original module has one of the following part numbers:
- 12592124 (Primary)
- 12581144
- 12588472
- 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)
Sourced from reliable, road-tested salvaged vehicles, each unit is inspected to ensure it is a functional and dependable replacement for your original failed computer. By choosing this Cadillac CTS ECM, you are getting an authentic GM part without the new-part price tag.
Frequently Asked Questions
What do I need to do after I purchase this ECM?
After you complete your purchase, you MUST provide us with your vehicle’s 17-digit VIN. We cannot ship the module until we have this information, as we use it to program the computer specifically for your car.
Is this part truly “plug and play”?
Because it is pre-programmed to your VIN, it is as close to plug-and-play as possible. However, many GM vehicles of this era require a security relearn procedure (also known as a Passlock or anti-theft relearn) after installation. This procedure syncs the new ECM with your vehicle’s keys and can typically be done without special tools. Instructions are widely available online.
How can I be sure my ECM is the problem?
The symptoms listed above are strong indicators, but it’s always best to have a professional diagnosis performed. A mechanic can confirm that the power and ground circuits to the ECM are good and that other components aren’t causing the issue. This ensures you are replacing the correct part.
Where is the ECM located on a 2005 Cadillac CTS?
On the 2004-2007 Cadillac CTS, the ECM is located in the engine compartment on the right-hand (passenger) side. Always disconnect the battery before attempting to remove or install the module.
This is a used part. How reliable is it?
This is a genuine OEM part sourced from a salvaged vehicle. Unlike many aftermarket parts, it was built to GM’s original quality standards. We inspect our parts to ensure they are in good working condition, providing a reliable and cost-effective solution.