Programmed 2009 G6 Engine Computer ECM | Replaces Part #12625455 & 12629009

Restore Peak Performance to Your Pontiac G6

Is your 2009 Pontiac G6 frustrating you with intermittent stalling, a stubborn no-start condition, or a check engine light that just won’t go away? As a technician with over two decades of experience, I’ve seen these exact symptoms hundreds of times. More often than not, the root cause isn’t a complex mechanical failure, but a faulty Engine Control Module (ECM)—the brain of your vehicle. When the ECM starts to fail, it can create a cascade of confusing problems, from poor fuel economy to erratic transmission shifting. This isn’t just an annoyance; it’s a reliability issue that can leave you stranded.

This isn’t just a replacement part; it’s a complete, hassle-free solution. We take the guesswork and high dealership costs out of the equation. By providing us with your vehicle’s VIN at checkout, you will receive a 2009 G6 Engine Computer that is fully programmed with the latest, most stable software updates from GM. It arrives at your door ready for a straightforward installation, restoring the precise fuel delivery, ignition timing, and emissions control your vehicle had when it was new.

Common Signs of a Failing GM ECM

If you’re experiencing any of the following, a faulty engine computer is the likely culprit. Replacing your failing module can resolve these issues and restore your vehicle’s dependability.

• ✔ Check Engine Light is illuminated, often with codes like P0601, P0602, or P0606 (Internal Control Module Failure).
• ✔ Engine cranks but refuses to start.
• ✔ Unexplained stalling, especially after the engine has warmed up.
• ✔ Noticeable decrease in fuel efficiency.
• ✔ Rough or unstable idling.
• ✔ Communication errors with scan tools or other modules (U-codes).
• ✔ The vehicle enters a reduced power or “limp” mode.

A Straightforward Guide to Installation

You don’t need to be a master mechanic to install this part. With basic hand tools, you can get your G6 back on the road in under an hour. Our pre-programming service means you skip the expensive trip to the dealer for software flashing.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
2. Locate the ECM: On the 2009 Pontiac G6, the Engine Control Module is typically found in the left-hand (driver’s side) front of the engine compartment, often near the air filter housing.
3. Disconnect the Old Unit: Carefully unplug the electrical connectors from the old ECM. There are usually release tabs that need to be pressed or lifted.
4. Swap the Modules: Unbolt the old module from its mounting bracket and set it aside. Mount your new, pre-programmed ECM in its place.
5. Connect and Secure: Plug the electrical connectors firmly into the new module until they click into place. Ensure they are fully seated.
6. Power Up: Reconnect the negative battery terminal.
7. Security Relearn: In some cases, a simple security relearn procedure may be necessary. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Your vehicle’s manual will have the specific steps.

Verified Vehicle Compatibility

This module is a direct replacement for part numbers 12625455 and 12629009. It fits a wide range of General Motors vehicles. Please verify your model and options below to ensure a perfect fit.

Frequently Asked Questions