Restore Peak Performance and Reliability to Your Buick
Is your 2005-2008 Buick LaCrosse suffering from frustrating issues like intermittent stalling, a persistent check engine light, poor fuel economy, 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 ECM is the brain of your vehicle’s engine, and when it falters, it can cause a cascade of problems that are difficult to diagnose. This isn’t just an inconvenience; it’s a matter of reliability and safety.
We offer a dependable and straightforward solution: a thoroughly tested, used OEM Engine Control Module, part number 19260507 (also compatible with service numbers 12581144, 12588472, and 12592124). The real value here is our professional programming service. Before we ship your part, we flash it with the latest official GM software, precisely matched to your vehicle’s VIN. This critical step ensures seamless communication with your car’s other systems and restores the original performance and efficiency specifications, something a generic, un-programmed module from a salvage yard simply cannot do.
Case Study: A Tricky Diagnosis
A customer brought in their ’07 LaCrosse 3.6L with a problem that had stumped two other shops: it would randomly stall at stoplights, but with no consistent check engine codes. We could have spent hours chasing phantom sensor issues. However, my experience with these GM platforms pointed towards the ECM. Heat soak and age can cause microscopic cracks in the circuit board, leading to these infuriating, intermittent failures. We swapped in a VIN-programmed ECM just like this one. The stalling vanished immediately. The customer saved hundreds on diagnostic labor and got a reliable car back, proving that sometimes the most direct fix is the right one.
Common Signs of a Failing Engine Computer
If you’re experiencing any of the following, a faulty ECM is a likely culprit. Replacing your 2005-2008 LaCrosse ECM can be the definitive solution.
- ✔ Check Engine Light is on with codes related to internal module failure (e.g., P0601, P0606).
- ✔ Engine stalls, stumbles, or misfires for no apparent reason.
- ✔ Vehicle won’t start, and the security light may be flashing.
- ✔ Noticeable decrease in fuel mileage.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to communicate with a diagnostic scan tool.
A Straightforward Guide to Your ECM Installation
Installing your replacement module is a manageable job for a confident DIYer. The location on the LaCrosse (lower air cleaner housing) makes it accessible. Follow these steps for a smooth installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all modules to power down completely.
- Locate the ECM: On the 3.6L LaCrosse and Allure, the ECM is secured to the lower portion of the air filter housing. You will need to remove the top of the airbox and the air filter to gain access.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors. They can be brittle, so apply steady, even pressure. Pull the connectors straight out from the module.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you’ll need it for the new unit.
- Install the New ECM: Mount your new, pre-programmed ECM onto the bracket and securely fasten it.
- Reconnect Everything: Plug the electrical harnesses back in, ensuring they click firmly into place. Reassemble the air filter housing and reconnect the negative battery terminal.
- Perform Security Relearn: In many cases, you may need to perform a simple security relearn procedure, which can typically be done without special tools. Turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeat two more times before attempting to start the engine.
Verified Vehicle Compatibility
This module is a guaranteed fit for the following vehicles, provided the part number or service number matches. Our VIN programming ensures it works correctly for your specific application.
- Buick Allure: 2005-2008 (3.6L)
- Buick LaCrosse: 2005-2008 (3.6L)
- Buick Rendezvous: 2004-2006 (3.6L)
- Cadillac CTS: 2004-2007 (Base models, check ID)
- Cadillac SRX: 2004-2006 (3.6L)
Don’t let a faulty computer keep your car off the road. This pre-programmed 2005-2008 LaCrosse ECM is the most efficient and cost-effective way to solve complex engine management problems. Order yours today and get your vehicle running right again.
Why do you need my VIN?
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential. It allows us to load the exact, correct GM factory software for your car’s specific options, engine, and transmission. This ensures perfect compatibility and function, eliminating the need for an expensive trip to the dealership for programming.
Is any other programming needed after I install it?
Our programming handles the core engine and transmission functions. However, you will likely need to perform a simple ‘Security Relearn’ or ‘Crankshaft Position Variation Relearn’ procedure. The security relearn can often be done without tools, while the crank relearn may require a capable scan tool for optimal performance.
My original part number is different. Will this still work?
Yes. Manufacturers often use several interchangeable ‘service numbers’ for the same part. This module, 19260507, is a direct replacement for service numbers 12581144, 12588472, and 12592124. As long as your vehicle is on the compatibility list, our VIN programming will ensure it works correctly.
Is this a new part?
This is a high-quality, tested, and inspected used OEM part sourced from a salvaged vehicle. This allows us to provide a reliable, factory-spec component at a fraction of the cost of a new one, while our professional programming ensures it performs like new.