Restore Peak Performance to Your GM 3.6L Vehicle
Is your Buick LaCrosse, Cadillac CTS, or another compatible GM vehicle suffering from perplexing engine problems? Issues like random stalling, poor fuel economy, a persistent Check Engine Light, or a complete no-start condition can often be traced back to a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, and when it malfunctions, it can cause a cascade of frustrating and difficult-to-diagnose symptoms. This genuine used GM ECM, part number 12592124, is the reliable and cost-effective solution to get your vehicle running smoothly again.
The Brain of Your Engine: Why a Healthy ECM is Crucial
The Engine Control Module orchestrates everything from fuel injection and ignition timing to emissions control and transmission shifting. It constantly processes data from sensors throughout your vehicle to make real-time adjustments for optimal performance, efficiency, and reliability. When internal components on the circuit board fail due to heat, vibration, or age, the signals it sends become erratic or stop altogether, leading to the symptoms you’re experiencing. Simply replacing the module isn’t enough; it must be correctly programmed to your specific vehicle’s Vehicle Identification Number (VIN) to communicate with all other onboard systems. We handle this critical programming step for you, ensuring a seamless integration process.
From the Diagnostic Bay
We had a 2007 Buick LaCrosse come in on a tow truck. The owner said it would run fine for a few minutes, then suddenly stall and refuse to restart for an hour. He had already replaced the crank sensor and fuel pump with no luck. After connecting our diagnostic scanner, we noticed the data stream from the ECM would completely drop out right before the stall. There were no specific trouble codes, just a loss of communication. We suspected an internal ECM failure caused by thermal stress. We installed one of our pre-programmed 12592124 modules, performed the quick security relearn, and the car fired right up. After a 30-minute test drive, the stalling issue was completely gone. It’s a classic case where the symptoms are confusing, but the root cause is the central computer.
Common Symptoms of a Failing 2005-2008 LaCrosse ECM
If you’re experiencing any of the following issues, a faulty engine computer could be the culprit. This module is a direct solution for these common problems:
- ✔ Check Engine Light is on with various communication or sensor-related codes (e.g., U-codes, P0601-P0606).
- ✔ Engine stalls intermittently, especially after warming up.
- ✔ Vehicle cranks but will not start.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Rough idling or misfires that aren’t resolved by new spark plugs or coils.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Loss of power and sluggish acceleration.
- ✔ Inconsistent or non-functional electronic throttle control.
A Simple, Programmed Solution
Don’t let a faulty ECM keep you off the road. Our process is designed to be straightforward and effective. This is a tested, genuine used ECM sourced from a salvaged vehicle. Upon purchase, you provide us with your vehicle’s VIN. Our technicians then use official GM equipment to flash the module with the latest, most up-to-date software specific to your car. This ensures all parameters are set correctly for your engine, transmission, and options package. The module arrives at your door ready for installation. In most cases, a simple security relearn procedure is all that’s needed to sync the new ECM with your vehicle’s anti-theft system, a process that can often be done without a trip to the dealer.
Guaranteed Fitment & Compatibility
This ECM is a direct replacement for several service numbers. If your original module has one of the following part numbers, this unit is the correct replacement:
- 12592124
- 12581144
- 12588472
- 19260507
This part is confirmed to fit the following vehicles with the 3.6L V6 engine. Please verify your original part number to ensure compatibility.
- Buick Allure: 2005-2008 (3.6L)
- Buick LaCrosse: 2005-2008 (3.6L)
- Buick Rendezvous: 2004-2006 (3.6L)
- Cadillac CTS: 2004-2007 (Base, 3.6L)
- Cadillac SRX: 2004-2006 (3.6L)
Frequently Asked Questions
Do I need to do anything after installing this ECM?
Yes. While we program the module to your VIN, you will need to perform a security relearn procedure (also known as a key relearn or anti-theft relearn). This syncs the programmed ECM to your vehicle’s ignition keys and security system. This procedure can typically be done without special tools and instructions can be found online or in a service manual.
How do I provide my VIN?
After you complete your purchase, you can send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship the module without it. Please double-check the VIN for accuracy before sending.
Is this a new part?
No, this is a high-quality, tested used part that has been sourced from a salvaged vehicle. Each unit is inspected and verified to be fully functional before being programmed and shipped. This provides a reliable, factory-original part at a significant savings over a new module.
Will this ECM fix my car’s problem?
This module will correct issues directly caused by a faulty ECM. It is crucial to properly diagnose your vehicle’s problem before ordering. If your issue is caused by a bad sensor, wiring, or another component, replacing the ECM will not resolve it.
What is the difference between all the part numbers listed?
GM often releases updated hardware or software versions of a module over time. The different service numbers (12581144, 12588472, 19260507, 12592124) are all physically compatible and functionally interchangeable once they are programmed with the correct software for your specific vehicle’s VIN.