Restore Your Vehicle’s Brain and Get Back on the Road with Confidence
Is your Cadillac, Buick, or SRX suffering from frustrating issues like stalling, erratic shifting, a persistent Check Engine Light, or a complete no-start condition? The Engine Control Module (ECM) is the central computer of your vehicle, and when it fails, it can cause a host of problems that are difficult to diagnose. This isn’t just an inconvenience; it’s a critical component for engine performance, fuel economy, and emissions. In my 20+ years as a technician, I’ve seen firsthand how a faulty ECM can mimic a dozen other problems, leading to wasted time and money on unnecessary repairs.
This listing is for a reliable, genuine OEM Engine Control Module, part number 12592124. Sourced from a salvaged vehicle, each unit is thoroughly inspected and ready for a new life in your car. The best part? We eliminate the biggest headache of ECM replacement: programming. Simply provide your vehicle’s VIN at checkout, and our experts will flash the module with the latest factory software specific to your car. This means no expensive trips to the dealership and no special scan tools required for programming. It’s the most direct path to fixing your vehicle right.
Case Study: A Tricky Diagnosis
I remember a 2006 Cadillac SRX that came into the shop with a complaint of random stalling at traffic lights. The owner had already replaced the throttle body and a couple of sensors with no luck. No hard codes were stored, only a pending P0606 (ECM Processor Fault) that would appear and disappear. After checking all the power and ground circuits to the ECM, we knew the issue was internal. The intermittent nature of the failure was classic ECM heat soak. We installed a pre-programmed 2004-2007 CTS ECM (a compatible unit) and the problem was solved instantly. This saved the customer hundreds over a new part and dealership programming fees.
Is Your GM 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 solution you need. Look out for:
- ✔ Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error), P0603 (Internal Control Module Keep Alive Memory Error), or P0606 (ECM/PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained stalling or rough idling, especially after the engine warms up.
- ✔ Poor fuel economy and a noticeable loss of power.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with your diagnostic scan tool.
A Straightforward Guide to Installation
Replacing your ECM is a job most DIY mechanics can handle in under an hour with basic hand tools. This pre-programmed module makes the process even simpler. While specific locations vary slightly by model, the general steps are consistent.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to ensure all systems are powered down.
- Locate the ECM: On most Cadillac CTS and SRX models, the ECM is found in the engine compartment on the passenger (RH) side. On Buick models like the LaCrosse and Allure, it’s often located in or near the lower air cleaner housing.
- Disconnect the Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Never force them. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the mounting hardware holding the old ECM in place and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed ECM in the same location and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harnesses back into the new module until they click securely into place. Reconnect the negative battery terminal.
- Perform Security Relearn: Your vehicle will likely require a simple security relearn procedure to recognize the new ECM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your owner’s manual for the exact procedure for your vehicle.
Verified Vehicle Compatibility List
This module, part number 12592124, is a direct replacement for service numbers 12581144, 12588472, and 19260507. It is guaranteed to fit and function correctly on the following vehicles:
- Cadillac CTS: 2004-2007 (Base models)
- Cadillac SRX: 2004-2006 (with 3.6L engine)
- Buick Allure: 2005-2008 (with 3.6L engine)
- Buick LaCrosse: 2005-2008 (with 3.6L engine)
- Buick Rendezvous: 2004-2006 (with 3.6L engine)
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) allows us to program the ECM with the exact software and calibrations for your car’s specific options, engine, and transmission. This ensures perfect compatibility and performance right out of the box.
Is this part difficult to install?
No, installation is straightforward for anyone with basic mechanical skills. Since we handle the programming, you just need to physically swap the modules and perform a simple security relearn procedure, which doesn’t require special tools.
What is a security relearn?
It’s a simple, built-in vehicle procedure that allows the anti-theft system to synchronize with the new ECM. It usually involves leaving the key in the ‘ON’ position for about 10 minutes. This step is crucial for the vehicle to start after the replacement.
This part is used. Is it reliable?
Absolutely. Every module is a genuine OEM part sourced from a salvaged vehicle and is inspected to ensure it is fully functional. This provides OEM quality and reliability at a fraction of the cost of a new part from a dealer.
Will this fix my specific problem?
This ECM will correct issues directly caused by a faulty module, such as internal processor faults (P0601, P0606), communication errors, and certain no-start or stalling conditions. It’s important to properly diagnose your vehicle to ensure the ECM is the root cause of the problem.