Programmed 2008 G6 Engine Control Module ECM | 12612384

Restore Peak Performance to Your GM Vehicle

Is your car or truck running rough, stalling unexpectedly, or showing a persistent check engine light? These are classic signs that the brain of your engine, the Engine Control Module (ECM), might be failing. As a technician with over two decades of experience, I’ve seen how a faulty ECM can cause endless frustration and misdiagnosis. This isn’t just a part; it’s the central command center for your engine’s performance, fuel economy, and emissions. This replacement 2008 G6 Engine Control Module is the definitive solution to get your vehicle running reliably again.

The biggest hurdle in replacing an ECM has always been the programming. In the past, this meant towing your vehicle to a dealership and paying hundreds for them to flash the new module. We’ve eliminated that step entirely. When you purchase this module, we will program it to your vehicle’s specific VIN with the latest GM software updates before it ships. This ensures it works seamlessly with your car’s existing systems, including the anti-theft security, transmission, and specific engine options. It’s a direct-fit, ready-to-install solution.

Common Signs of a Failing ECM

• ✔ Check Engine Light is on, often with communication codes (like U0100) or internal processor codes (P0601, P0602, P0606).
• ✔ Engine cranks but refuses to start.
• ✔ Rough or unstable idle.
• ✔ Unexplained drop in fuel economy.
• ✔ Car stalls for no apparent reason, especially when warm.
• ✔ Harsh or erratic automatic transmission shifting.
• ✔ Loss of power and poor acceleration.

A Straightforward Guide to Installation

Installing your new ECM is a manageable job for a DIY enthusiast. While the exact location varies slightly by model (see fitment list), the process is generally the same. For the Pontiac G6, it’s typically located in the left-hand (driver’s side) front of the engine compartment.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system to fully discharge.
2. Locate the ECM: Find the module in your engine bay. It’s a metal box with several large electrical connectors.
3. Disconnect Connectors: Carefully release the locking tabs on each electrical harness connector and pull them straight out. Never force them.
4. Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
5. Install the New Module: Bolt your new, pre-programmed ECM into place.
6. Reconnect Everything: Firmly plug the harness connectors back into the new module until they click and lock. Reconnect the negative battery terminal.
7. Perform Security Relearn: Most GM vehicles require a simple security relearn procedure to sync the new ECM with the anti-theft system. This can usually be done without special tools by cycling the key. A common method is: Turn the key to ‘ON’ for 10 minutes, ‘OFF’ for 10 seconds, and repeat two more times. Your vehicle should then start.

Verified Vehicle Compatibility

This module, part number 12612384, is a direct replacement for service numbers 12612384, 12622141, and 12617568. It fits a wide range of GM vehicles. Please confirm your model and engine options below.

How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot program and ship your module without it.

Do I need to do anything after installing this module?
Yes. In most cases, you will need to perform a simple ‘Security Relearn’ or ‘Anti-Theft Relearn’ procedure. This syncs the new module to your key and security system and can be done without any special tools. We include general instructions to help you.

Is this part really ready to install out of the box?
Yes, because we program it for you. It arrives flashed with the latest GM software matched to your VIN, so you don’t need a trip to the dealer for programming. Just install it and perform the security relearn.

Will this fix my specific problem?
This module will correct any issues directly caused by a failing ECM. If you’re experiencing symptoms like stalling, no-start, or specific internal ECM error codes, this is very likely the solution. Proper diagnosis is always recommended.

Is this a direct replacement for part number 12622141 or 12617568?
Yes. This module is fully compatible with and serves as a direct replacement for part numbers 12612384, 12622141, and 12617568.