Is Your Cadillac or GM Vehicle Running Rough?
If you’re dealing with a persistent Check Engine Light, erratic engine behavior, stalling, or a no-start condition, a failing Engine Control Module (ECM) is a very likely culprit. For over 20 years in my shop, I’ve seen how a faulty ECM can throw a wrench into your vehicle’s performance, often mimicking other issues and leading to frustrating and expensive misdiagnoses. This isn’t just a part; it’s the brain of your engine, and when it’s not working right, nothing else will.
The Direct, No-Hassle Solution: A Pre-Programmed ECM
Forget about expensive dealership visits and the headache of finding a shop that can program a replacement module. This is a genuine, used OEM Engine Control Module, part number 12592124, that we professionally program to your vehicle’s specific Vehicle Identification Number (VIN) before we ship it. We load it with the latest GM software updates, ensuring it communicates perfectly with your car’s systems right out of the box. This is the most straightforward way to get your car back to factory-spec performance.
Expert Pro Tip from a 20-Year Veteran Technician
Before installing your replacement ECM, take a moment to inspect the main wiring harness where it runs near the module’s mounting bracket. On these GM platforms, I’ve frequently found harnesses that have chafed through the insulation from years of vibration. This can cause a short that not only damages the original ECM but will instantly fry your new one. A few wraps of electrical tape or securing the harness with a zip tie is a 5-minute check that can save you from a costly mistake.
Common Symptoms of a Failing 2004-2007 CTS ECM
If you’re experiencing any of the following, this module is the likely solution:
- โ Unexplained Check Engine Light with various communication or sensor codes
- โ Engine stalling or shutting off while driving
- โ Harsh or erratic automatic transmission shifting
- โ Noticeable loss of power and poor fuel economy
- โ Vehicle won’t start, but the battery and starter are good
- โ Communication issues with diagnostic scan tools
Plug-and-Play Installation: No Dealer Visit Required
We’ve done the complex part for you. The programming is complete. All you need are basic hand tools and a few minutes to get your vehicle running correctly again. Hereโs a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the ECM: On most compatible vehicles like the CTS or SRX, you’ll find it in the engine compartment, often on the right-hand (passenger) side. On others like the LaCrosse or Allure, it’s typically located in or near the lower air cleaner housing.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Do not force them.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your replacement ECM, reconnect the wiring harnesses until they click securely in place, and re-fasten the locking tabs.
- Final Step: Reconnect the negative battery terminal. The vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Your vehicle’s manual will have the specific steps.
Guaranteed Compatibility
This ECM is a direct replacement for several part numbers and fits a range of GM vehicles. Please verify your part number or match your vehicle from the list below. This unit is compatible with service numbers: 12581144, 12588472, 12592124, and 19260507.
- Cadillac CTS: 2004-2006 (Base, ID 12592124 or 19260507)
- Cadillac CTS: 2007 (Base)
- Cadillac SRX: 2004-2006 (3.6L)
- Buick Allure: 2005-2008 (3.6L)
- Buick LaCrosse: 2005-2008 (3.6L)
- Buick Rendezvous: 2004-2005 (ID 19260507)
- Buick Rendezvous: 2006 (3.6L)
IMPORTANT: After your purchase, please send us a message with your 17-digit VIN. We cannot ship your part until we have this information to complete the programming service.