Restore Peak Performance to Your GM Vehicle with a VIN-Programmed ECM
Is your Cadillac CTS, SRX, or Buick running rough, stalling unexpectedly, or refusing to start? A faulty Engine Control Module (ECM) is often the culprit behind these frustrating and complex issues. As the central computer of your vehicle, the ECM governs everything from fuel injection and ignition timing to transmission shifting. When it fails, the symptoms can be unpredictable and difficult to diagnose. This isn’t just an inconvenience; it’s a critical failure that compromises your vehicle’s performance and reliability.
This listing is for a dependable, tested OEM Engine Control Module, part number 12592124. We take the guesswork and high cost out of the repair process. Before this module ships, our experts will program it with the latest official GM software updates, specifically matched to your vehicle using the VIN you provide. This means it arrives at your door ready for a straightforward installation, eliminating the need for an expensive trip to the dealership for programming. You get a reliable, cost-effective solution that restores your vehicle’s original function.
Case Study: A Tricky Diagnosis
I remember a 2006 Buick LaCrosse with the 3.6L V6 that came into my shop. The owner had already replaced spark plugs and ignition coils trying to chase down a random misfire (P0300) and a harsh 1-2 shift. The check engine light would come and go. After scanning, I found no other codes. My experience with these E55 controllers immediately pointed me toward the ECM. The driver circuits inside the module that control the ignition coils can weaken over time, causing intermittent failures that don’t always set a specific component code. We installed a VIN-programmed ECM, performed a quick security relearn, and the misfire and shifting issues were gone for good. It saved the customer from replacing more unnecessary parts.
Common Signs of a Failing Engine Computer
If you’re experiencing any of the following, a faulty ECM could be the root cause. A proper diagnosis is key, but these are strong indicators:
- ✔ Check Engine Light is illuminated, often with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ The engine cranks but will not start.
- ✔ Unexplained drops in fuel economy.
- ✔ The vehicle stalls for no apparent reason, either while driving or at idle.
- ✔ Rough idling, engine hesitation, or misfires.
- ✔ Problems with the automatic transmission shifting smoothly.
- ✔ Loss of communication with the scan tool.
A Straightforward Guide to Installation
Installing your pre-programmed module is a simple process that most DIY enthusiasts can handle. Since we’ve done the programming, no special tools are required.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the ECM: On most compatible vehicles, the ECM is found in the engine compartment, either on the side or near the air cleaner housing. Refer to your vehicle’s service manual for the exact location.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be released. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, programmed ECM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Relearn (If Needed): In some cases, a simple security or Crankshaft Variation (CASE) relearn procedure may be required. This can often be done without a scan tool. Consult your service manual for vehicle-specific instructions.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 12581144, 12588472, 12592124, and 19260507. Please verify your part number or consult the list below to ensure proper fitment. This part is compatible with the following vehicles and options:
2005 (3.6L)
2006-2008 (3.6L, lower air cleaner housing)
Buick LaCrosse:
2005 (3.6L)
2006-2008 (3.6L, lower air cleaner housing)
Buick Rendezvous:
2004-2005 (LH engine compartment, ID 19260507)
2006 (3.6L)
Cadillac CTS:
2004 (RH engine compartment, Base, ID 19260507)
2004-2006 (RH engine compartment, Base, ID 12592124)
2007 (RH engine compartment, Base)
Cadillac SRX:
2004-2006 (RH front engine compartment, 3.6L)
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to load the exact, correct software for your car’s specific options and systems. This ensures the module communicates perfectly with the rest of the vehicle, just like a new part from the factory.
Is this part difficult for a DIYer to install?
Not at all. Since the module comes pre-programmed, the physical installation is typically very simple. It involves disconnecting the battery, unplugging the old module, and plugging in the new one. No special programming tools are required.
Will this fix my car’s specific problem?
This ECM will resolve any issues directly caused by a faulty engine computer. However, it’s crucial to have your vehicle properly diagnosed first, as similar symptoms can be caused by other failing parts like sensors or wiring.
What does ‘flashed with the newest updates’ mean?
Manufacturers like GM often release software updates to fix bugs, improve performance, or enhance efficiency that were discovered after the vehicle was built. We install the latest available version, so you’re not just replacing the part—you’re getting the most refined software for your car.
This is a used part. Is it reliable?
Yes. Each module is sourced from a salvaged vehicle and thoroughly inspected and tested to ensure it is fully functional. The professional programming with fresh software further ensures its operational integrity, offering a reliable and economical repair solution.