Restore Peak Performance to Your Vehicle’s Engine
Is your Cadillac XLR, Buick Allure, Chevy Colorado, or another compatible GM vehicle suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that governs your vehicle’s engine performance, fuel economy, and emissions. A faulty ECM can cripple your vehicle, leaving you stranded and facing a complex diagnostic challenge. This genuine GM Engine Control Module, service number 12630457, is the definitive solution to restore your vehicle’s factory performance and reliability.
From the Diagnostic Bay
We had a 2009 Cadillac XLR in the shop that was driving the owner crazy. It would run perfectly for 20 minutes, then suddenly stall at a stoplight and refuse to restart for an hour. There were no consistent trouble codes, just a generic communication error that would pop up intermittently. We checked fuel pressure, ignition components, and wiring harnesses, but everything tested fine. On a hunch, we monitored the live data stream from the ECM. As the engine bay heated up, the data output would become erratic right before a stall. The internal processors were failing under heat. We replaced it with a VIN-programmed module like this one, and the car ran flawlessly. It’s a textbook example of how a failing ECM can mimic a dozen other problems.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns immediately.
- ✔ Engine stumbling, misfiring, or running rough.
- ✔ Unexplained decrease in fuel efficiency.
- ✔ Intermittent or complete failure to start the engine.
- ✔ Hesitation or stalling during acceleration.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Loss of communication with diagnostic scan tools.
Your Plug-and-Play Solution: The 2008-2009 XLR ECM
Don’t settle for a generic, unprogrammed module that will require expensive trips to the dealership for flashing and security relearns. We take the guesswork and hassle out of the repair. When you purchase this ECM, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then program the module with the latest, most stable GM-certified software specific to your exact vehicle build. This ensures perfect compatibility with your engine, transmission, and all related electronic systems. The result is a true plug-and-play component that restores your vehicle’s brain to factory-new condition. This professional programming service is included with your purchase.
Broad Compatibility Across the GM Family
While this is a perfect fit for the 2008-2009 Cadillac XLR, this versatile E38 ECM was used across a wide array of General Motors vehicles. This module is a direct replacement for a variety of service numbers, ensuring you get the right part. It is fully interchangeable with the following part numbers:
12590032, 12602044, 12603530, 12605843, 12607096, 12630457, 19210737
Please review the extensive fitment list to confirm this part is correct for your specific year, make, model, and engine combination. A correct match is crucial for proper function.
Frequently Asked Questions
What is VIN programming and why do I need it?
VIN programming loads your vehicle’s specific software and security information onto the ECM. Without it, the module will not communicate correctly with other systems in your car, leading to a no-start condition and multiple error codes. Our service ensures the part is ready for installation right out of the box.
Will I need to do anything else after installation?
In most cases, this is a plug-and-play installation. However, some GM vehicles may require a simple security relearn procedure (often called a CASE relearn or anti-theft relearn) which can typically be done without special tools. Instructions for this procedure are widely available online or in service manuals.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot ship your part until we receive this information, as the programming is a critical step. Please double-check your VIN for accuracy before sending.
Is this a new or used part?
This is a high-quality, tested, and guaranteed functional used OEM part. Each unit is inspected and then programmed with fresh, vehicle-specific software, providing a reliable and cost-effective alternative to a brand-new module from a dealer.
What if my original part number is not on the list?
If your part number is not listed in the interchangeable numbers, this module may not be correct for your vehicle, even if your model is listed. Please contact us with your VIN and original part number before ordering to ensure we can provide the correct component for your car.