Restore Peak Performance to Your GM Vehicle
Are you battling a persistent check engine light, erratic engine behavior, or a no-start condition in your 2009-2010 GM truck, van, or SUV? The Engine Control Module (ECM), the central computer of your vehicle, is often the root cause of these frustrating issues. This direct-fit ECM, part number 12629009 (also compatible with 12625455), is the definitive solution to get your vehicle running reliably again. We eliminate the guesswork and costly dealership visits by pre-programming this module specifically to your vehicle’s VIN before it ships, ensuring a seamless installation process.
From the Diagnostic Bay
I once had a 2009 Sierra 2500 in the shop with an intermittent stalling problem that was driving the owner crazy. It would die at a stoplight, then fire right back up. No consistent trouble codes were stored, making diagnosis a nightmare. After exhausting all the usual suspects—fuel pump, sensors, wiring—we focused on the ECM. We found that heat soak was causing an internal failure on the main board. Swapping in a VIN-programmed ECM like this one resolved the issue immediately. These modules can fail in ways that are incredibly difficult to trace, making a known-good, correctly programmed replacement the most efficient repair.
Is Your Vehicle Showing Signs of a Failing ECM?
A faulty engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, a failing ECM could be the culprit:
- ✔ Persistent Check Engine Light (CEL) with codes like P0601, P0606, or other internal processor faults.
- ✔ Unexplained engine stalling or hesitation during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough idling or misfires that aren’t resolved by new spark plugs or coils.
- ✔ The vehicle cranks but refuses to start.
- ✔ Communication errors when trying to use a diagnostic scan tool.
- ✔ Erratic automatic transmission shifting patterns.
The Simple, VIN-Programmed Solution
Don’t settle for a generic, off-the-shelf module that requires expensive programming at a dealership. Our process is designed for the DIY mechanic and professional alike. When you purchase this module, simply provide us with your vehicle’s 17-digit VIN. Our technicians will then use official GM equipment to flash the unit with the latest, most stable software specific to your vehicle’s configuration. This ensures perfect communication between the engine, transmission, and other onboard systems. This is the key to a successful repair for a complex component like the 2009-2010 Tahoe ECM.
Installation and Setup
Once you receive your pre-programmed ECM, installation is straightforward. Locate your old module (typically in the engine compartment), disconnect the battery, swap the modules, and reconnect the battery. For many GM vehicles, a simple security relearn procedure may be necessary to sync the new ECM with your vehicle’s anti-theft system. This procedure can often be completed in your driveway without any special tools, and instructions are widely available.
Frequently Asked Questions
What exactly does an ECM do?
The Engine Control Module (ECM) is your vehicle’s main computer. It controls critical functions like fuel injection timing, ignition timing, variable valve timing, and transmission shifting. When it fails, it can cause a wide range of performance problems.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is essential for the part to function.
Is this a direct replacement for part number 12625455?
Yes. Part number 12629009 is a compatible and often superseding part number for 12625455. This module is guaranteed to work for all applications listed for both part numbers.
Will I need to do anything after installing this ECM?
While the module comes programmed for engine and transmission functions, you may need to perform a security relearn (also known as a key relearn or anti-theft relearn). This procedure syncs the new ECM with your vehicle’s keys and can typically be done in 10-30 minutes without special tools.
What happens if I install an ECM that isn’t programmed?
An unprogrammed ECM will not allow the vehicle to start. The internal software is missing the specific instructions for your engine, transmission, and options. It will also not be synced with the vehicle’s security system, preventing fuel delivery and ignition.