Is Your Cadillac, Buick, or SRX Running Rough? We Have the Solution.
There’s nothing more frustrating than a vehicle that won’t run right. Stalling at intersections, a persistent Check Engine Light, erratic shifting, or a no-start condition can ruin your day and your confidence in your car. Often, the root cause isn’t a simple sensor but the very brain of your engine: the Engine Control Module (ECM). When your ECM fails, it can send incorrect signals to everything from your fuel injectors to your transmission, causing a cascade of problems. This is a common issue I’ve diagnosed hundreds of times in my 20+ years as a technician, especially on vehicles with the GM 3.6L engine.
This listing is for a genuine, used OEM Engine Control Module, part number 12592124. It’s a reliable and cost-effective solution to get your vehicle back in top form without the excessive cost of a new unit from a dealership. We take the guesswork and hassle out of the repair by professionally programming this module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures proper communication with all other modules in your car and loads the latest software updates from General Motors for optimal performance and efficiency.
From the Diagnostic Bay: A Common Misdiagnosis
I remember a 2006 Buick LaCrosse that came into my shop. The owner had already replaced three different sensors and the throttle body trying to fix an intermittent stalling issue and a P0606 (ECM Processor Fault) code. He was frustrated and out hundreds of dollars. We connected our diagnostic scanner and saw erratic data streams coming from the ECM itself. The module was failing internally. We installed a pre-programmed 2004-2007 CTS ECM (which cross-references perfectly), performed the security relearn, and the car ran perfectly. This story is a classic example of how targeting the root cause saves time, money, and headaches.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in many ways. If you’re experiencing any of the following, this module is likely the fix you need:
- ✔ Persistent Check Engine Light (CEL)
- ✔ Diagnostic Trouble Codes (DTCs) like P0601, P0606, or other communication errors.
- ✔ Engine stalling or shutting off while driving.
- ✔ Rough or unstable idle.
- ✔ Vehicle won’t start, but the battery and starter are good.
- ✔ Poor fuel economy.
- ✔ Harsh or incorrect transmission shifting.
- ✔ Noticeable loss of engine power.
A Straightforward Guide to Installation
Installing your pre-programmed 2004-2007 CTS ECM is a manageable job for a DIYer with basic tools. The most critical part after installation is the security relearn, which pairs the new module to your vehicle’s anti-theft system. Here’s a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to ensure all modules are powered down.
- Locate the ECM: On a Cadillac CTS or SRX, it’s typically in the engine compartment on the passenger (RH) side. On a Buick Allure or LaCrosse, it’s often found in or near the lower air cleaner housing. Consult a repair manual for your specific model if you’re unsure.
- Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out. Never force them. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt your new, pre-programmed ECM into place. Reconnect the electrical connectors, ensuring they click securely into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Security Relearn (Crucial Step): This procedure is required. A common method for these GM vehicles is:
- Turn the key to the “ON” position (do not start the engine).
- Attempt to start the engine. It will likely crank but not start. Leave the key in the “ON” position.
- Wait 10-12 minutes. The “Security” or “Theft” light on the dash should turn off or stop flashing.
- Turn the key to “OFF” for 5 seconds.
- Repeat this cycle two more times for a total of three 10-minute cycles.
- After the third cycle, the vehicle should start and run, indicating the relearn is complete.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 12581144, 12588472, 12592124, and 19260507. It is guaranteed to fit the following vehicles with the specified options:
- Buick Allure: 2005-2008 (3.6L)
- Buick LaCrosse: 2005-2008 (3.6L)
- Buick Rendezvous: 2004-2006 (3.6L)
- Cadillac CTS: 2004-2007 (Base models)
- Cadillac SRX: 2004-2006 (3.6L)
After your purchase, please provide us with your VIN. This is essential for us to program the module correctly for your specific vehicle before shipment, ensuring a smooth and successful repair.