Is your 2006 Chevrolet Monte Carlo or other GM vehicle suffering from perplexing engine issues? A faulty Engine Control Module (ECM), the brain of your vehicle’s engine management system, is often the culprit behind poor performance, decreased fuel economy, and frustrating check engine lights. This genuine GM Engine Control Module, part number 12630457, is the definitive solution to restore your vehicle’s original performance and reliability. We take the guesswork out of the repair by programming the module specifically to your vehicle’s VIN before it ships, ensuring a seamless, plug-and-play installation process.
From the Diagnostic Bay
We had a 2008 Impala come in with what the owner was sure was a failing transmission. It had harsh, erratic shifts and would occasionally feel like it was slipping between gears. We checked the transmission fluid, ran diagnostics on the solenoids, and everything looked fine. After hours of chasing ghosts, we decided to look at the data coming from the ECM. We noticed erratic voltage readings to the transmission control module (TCM) which is integrated with the ECM on many of these models. On a hunch, we swapped in a known-good, programmed ECM. The car drove perfectly. The original ECM had an internal fault that was mimicking a major transmission problem, saving the customer thousands in unnecessary repairs. A failing ECM doesn’t always throw obvious engine codes.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is illuminated, often with communication-related trouble codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Poor or erratic automatic transmission shifting.
- ✔ Loss of power and sluggish acceleration.
- ✔ Intermittent issues that are difficult to diagnose.
The Perfect Solution for Your 2006 Monte Carlo ECM
Replacing your vehicle’s ECM can seem daunting, but our service simplifies the process. Unlike a generic module from a local parts store or salvage yard, this unit is not just a part in a box. It’s a comprehensive solution. When you order, you provide us with your vehicle’s VIN. Our technicians then use official GM equipment to load the latest, most stable factory software specific to your car’s exact build. This critical step ensures all systems—from the engine and transmission to the anti-lock brakes and security system—communicate flawlessly. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money.
This module is a direct replacement for a wide variety of GM vehicles and is interchangeable with several service numbers, including 12590032, 12602044, 12603530, 12605843, 12607096, and 19210737. While this listing is focused on the 2006 Monte Carlo ECM, it also provides a perfect fit for models like the Pontiac G6, Chevrolet Impala, Buick LaCrosse, Cadillac DTS, and many more across the GM family. Please verify the extensive fitment list to confirm compatibility with your specific vehicle.
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will need to send us your 17-digit Vehicle Identification Number (VIN). Our technicians will use this number to flash the module with the correct GM factory software for your vehicle’s specific options and configuration. This makes the unit ready for installation right out of the box.
Will I need to do anything else after installation?
In most cases, the module is plug-and-play. However, some vehicles may require a security relearn procedure or a crankshaft position sensor relearn. These are simple procedures that can often be done without special tools. Instructions can be readily found online or in a service manual.
Is this a new or used part?
This is a high-quality, tested, and verified used OEM part. Each module is inspected to ensure it meets our strict quality standards before being programmed and shipped. This provides OEM reliability at a fraction of the cost of a new unit from a dealership.
How do I find my part number to confirm a match?
Your original ECM’s part number is printed on a sticker on the module itself. For a 2006 Monte Carlo, it’s typically located inside the lower part of the air cleaner box. You can match it to 12630457 or any of the interchangeable service numbers listed in the description.
What is your warranty policy?
We stand behind our products with a standard warranty. Please check the warranty details on this page for specific terms and conditions. Our goal is to ensure you get a reliable part that solves your vehicle’s issues.