Restore Your Vehicle’s Performance with a Reliable, Programmed ECM
Is your Cadillac, Buick, or SRX suffering from frustrating issues like stalling, erratic idling, a persistent Check Engine Light, or a complete no-start condition? As a technician with over two decades of experience, I’ve seen these symptoms countless times, and they often point directly to a failing Engine Control Module (ECM)—the computer that acts as your engine’s brain. When it falters, the entire vehicle’s performance and reliability are compromised. This isn’t just an inconvenience; it’s a critical failure that needs a dependable solution.
This listing is for a thoroughly tested, used OEM Engine Control Module, part number 19260507 (interchangeable with 12581144, 12588472, and 12592124). The most significant benefit we offer is that this module arrives at your door pre-programmed with the latest GM software updates, specifically matched to your vehicle’s VIN. This eliminates the need for an expensive trip to the dealership for programming, saving you both time and money. You get a component that’s ready for installation right out of the box, making it an ideal fix for both seasoned mechanics and determined DIYers.
Common Signs of a Failing Engine Control Module
If your vehicle is exhibiting any of the following symptoms, a failing ECM is a highly likely culprit. On the diagnostic scanner, you may see codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ Vehicle refuses to start or cranks but won’t turn over
- ✔ Intermittent stalling, especially when coming to a stop
- ✔ Noticeable decrease in fuel economy
- ✔ Rough or unstable engine idle
- ✔ Check Engine Light is illuminated with module-specific codes
- ✔ Poor acceleration or loss of power
- ✔ Communication errors with other vehicle modules
Case Study: A Tricky Diagnosis
A customer brought in a 2005 Buick Rendezvous with an intermittent no-start condition that had stumped two other shops. It would run fine for days, then suddenly refuse to start. There were no consistent trouble codes. After checking all the basics—battery, starter, fuel pressure—I focused on data streaming from the ECM. I noticed that during the no-start events, the ECM wasn’t sending the ‘crank’ signal to the powertrain relay. After swapping in a known-good, programmed ECM like this one, the problem vanished completely. The original unit had an internal fault that only appeared under specific temperature conditions. This is a classic example of how a failing 2004-2006 SRX ECM can create ghost-like issues that are impossible to trace without addressing the root cause.
A Straightforward Guide to Installation
Replacing the ECM on these vehicles is a manageable job. The key is our pre-programming service, which handles the most complex part for you. Here’s a general guide to get you started:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On the SRX and CTS, it’s typically in the engine compartment on the passenger (RH) side. On Buick models, it’s often found in or near the lower air cleaner housing. Refer to your vehicle’s service manual for the exact location.
- Disconnect Connectors: Carefully unclip and remove the electrical wiring harnesses from the old ECM. These connectors have locking tabs that must be released to prevent damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need to reuse it.
- Install the New ECM: Mount your new, pre-programmed module in place and securely tighten the bolts. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Security Relearn: Your vehicle may require a simple key-cycle security relearn procedure to recognize the new ECM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Instructions will be provided.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM vehicles equipped with the 3.6L engine. Please verify your part number or contact us with your VIN to confirm compatibility. This 2004-2006 SRX ECM is guaranteed to fit the following:
- Cadillac SRX: 2004-2006 (3.6L Engine)
- Cadillac CTS: 2004-2007 (Base, ID 12592124 or 19260507)
- Buick Allure: 2005-2008 (3.6L Engine)
- Buick LaCrosse: 2005-2008 (3.6L Engine)
- Buick Rendezvous: 2004-2006 (3.6L Engine, ID 19260507)
By purchasing from us, you’re not just getting a part; you’re getting a fully functional, VIN-matched solution that restores your vehicle’s factory performance and reliability. Let us help you get back on the road with confidence.
Frequently Asked Questions
Do I need to do any programming myself?
No. We program the module to your specific vehicle using the VIN you provide during checkout. It will arrive ready to install. However, a simple security relearn procedure (key cycle) is typically required after installation.
Is this a new part?
No, this is a high-quality, tested used OEM part sourced from a salvaged vehicle. This allows us to offer a reliable, cost-effective solution compared to a new dealer part.
How do I provide my VIN?
After you complete your purchase, you will need to send us a message with your vehicle’s 17-digit VIN. We cannot ship the module until we receive this information for programming.
What if my original part number is different?
This module, part number 19260507, is a direct replacement for service numbers 12581144, 12588472, and 12592124. As long as your vehicle is on the compatibility list, this module will function correctly.
Will this fix my car’s problem for sure?
This part will correct issues directly caused by a faulty ECM. While the symptoms listed are common for ECM failure, we always recommend a proper diagnosis by a qualified mechanic to ensure you are purchasing the correct part for your specific problem.