Is your 2008 or 2009 Buick LaCrosse experiencing perplexing engine issues like stalling, poor fuel economy, or a persistent check engine light? The Engine Control Module (ECM), the master computer of your vehicle, is often the source of these frustrating problems. This genuine GM Engine Control Module, service number 19210737, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency.
Unlike a standard replacement part from a local store, this ECM arrives at your door specifically programmed for your vehicle. We use your unique Vehicle Identification Number (VIN) to load the latest, most stable software updates directly from GM. This critical step ensures that the module communicates flawlessly with your engine, transmission, and all other vehicle systems, eliminating the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 2008 LaCrosse with the 5.3L V8 come in that was driving the owner crazy. It had a random misfire code that would pop up, and the transmission shifts were harsh and unpredictable. The owner had already replaced spark plugs, wires, and even a coil pack with no success. After hooking up our diagnostic tools, we noticed the injector pulse width was erratic on one cylinder. The issue wasn’t the injector itself, but the driver circuit inside the original ECM was failing intermittently. We installed one of our VIN-programmed modules, performed the security relearn, and the car ran perfectly. It’s a classic case where chasing parts gets expensive, but addressing the vehicle’s ‘brain’ provides the real fix.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start or intermittent starting problems.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass emissions testing.
Why Choose Our Pre-Programmed 2008-2009 LaCrosse ECM?
Choosing the right replacement is crucial for a lasting repair. Our process is designed to provide a reliable, straightforward solution. When you order this 2008-2009 LaCrosse ECM, you’re not just getting a part; you’re getting a fully prepared component that integrates seamlessly with your vehicle. The programming we perform corrects common factory software bugs and optimizes engine parameters for longevity and performance based on GM’s latest specifications. This module is a direct replacement for multiple service numbers, ensuring broad compatibility.
Interchangeable Service Numbers: 12590032, 12602044, 12603530, 12605843, 12607096, 12630457, 19210737
While this listing is focused on the 2008-2009 LaCrosse ECM, this versatile module also fits a wide range of other GM vehicles, including the Chevy Impala, Pontiac G6, Cadillac DTS, and GMC Envoy, among many others. Please verify the fitment list to ensure compatibility with your specific model and engine option.
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship the module until we have this information to perform the programming.
Will I need to do anything after installing the ECM?
In most cases, you will need to perform a security relearn procedure (also known as a CASE relearn or anti-theft relearn). This is a simple process that can often be done without special tools and involves a sequence of key turns. Instructions are widely available online for your specific vehicle.
Is this a brand new part?
This is a high-quality, tested, and verified genuine OEM part that has been professionally prepared with new software for your vehicle. This ensures OEM-level reliability and function.
What if my original part number is not on the list?
The provided list of service numbers covers the most common interchanges for this ECM. If your number is not listed, please contact us with your VIN and original part number to confirm compatibility before ordering.
How long does the programming and shipping process take?
Programming is typically completed within one business day of receiving your VIN. After that, the module is shipped out via the method you select at checkout.