End the Guesswork and Get Your Car Running Right
Is your vehicle suffering from frustrating, intermittent issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition? These are classic signs that the brain of your engine, the Powertrain Control Module (PCM), is failing. Don’t let a faulty computer keep you off the road. This replacement PCM, service number 12597125, is the definitive, reliable solution to restore your vehicle’s performance and your peace of mind.
We take the complexity out of the repair. Before this module ever leaves our facility, it’s professionally programmed with the latest GM software updates, tailored specifically to your vehicle’s unique Vehicle Identification Number (VIN). This means no expensive trips to the dealership for programming—it arrives at your door ready for a straightforward installation. Get back to a smooth, predictable, and worry-free drive.
Warning Signs and How to Overcome Them
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the solution you need:
- ✔ Unexplained Check Engine Light with codes like P0601, P0606, or U0100.
- ✔ Poor fuel economy that has gotten progressively worse.
- ✔ The engine cranks but refuses to start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Stalling for no apparent reason, either at idle or while driving.
- ✔ Noticeable loss of engine power and acceleration.
A Mechanic’s Story: The Ground Wire That Wasn’t
“I had a customer with a Chevy Cobalt, a sister car to the G5, that was on its third computer from another supplier. The car would run for a week, then die. Everyone condemned the PCM again. Before swapping it, I did a full system check. Tucked away near the cylinder head was a corroded ground strap, barely making contact. A simple $5 part and 15 minutes of cleaning the contact point fixed a problem that had cost the owner hundreds. It’s a powerful reminder: always check your main power and ground connections before replacing a major electronic component. A solid foundation is key to a lasting repair.”
Guided Installation to Restore Your Ride
You don’t need to be a master mechanic to complete this job. With our pre-programmed module, the heavy lifting is already done. Follow these simple steps for a successful installation:
- Safety First: Always disconnect the negative terminal of your vehicle’s battery and wait at least 15 minutes to allow the system to fully discharge.
- Locate the Old PCM: On most of these vehicles, the PCM is located in the engine bay, often on the driver’s side near the front, sometimes as part of the air cleaner assembly.
- Careful Disconnection: Gently release the locking tabs on the electrical connectors and pull them straight out. Avoid wiggling them, as this can damage the pins. Then, unbolt the module from its mounting bracket.
- Install the New Module: Seat your new, pre-programmed PCM onto the bracket and secure the bolts. Firmly reconnect the electrical harnesses, ensuring the locking tabs click securely into place.
- Power Up: Reconnect the negative battery terminal.
- Final Step – Security Relearn: Your vehicle may require a simple security relearn procedure to sync the new PCM with your anti-theft system. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times before starting the engine. Consult your owner’s manual for the exact procedure for your model.
Tailored Fit for Your 2007-2010 Pontiac G5 PCM and More
This module is a direct-fit replacement for a wide range of General Motors vehicles. Please verify your service number or contact us with your VIN to confirm compatibility. This part is confirmed to fit the following models and configurations:
- Buick Lucerne: 2009-2011 (3.9L)
- Chevrolet Cobalt: 2007-2010 (2.2L, 2.4L)
- Chevrolet HHR: 2007-2011 (2.2L, 2.4L)
- Chevrolet Impala: 2010-2011
- Chevrolet Malibu: 2007-2012 (2.2L, 2.4L, 3.5L)
- Chevrolet Silverado 1500: 2007-2009 (4.3L)
- Chevrolet Express 1500 Van: 2008-2009 (4.3L)
- GMC Savana 1500 Van: 2008-2009 (4.3L)
- GMC Sierra 1500: 2007-2009 (4.3L)
- Pontiac G5: 2007-2010
- Pontiac G6: 2008-2010 (2.4L)
- Pontiac Solstice: 2008-2010 (2.4L)
- Saturn Aura: 2008-2009 (2.4L)
- Saturn Sky: 2008-2010 (2.4L)
- Saturn Vue: 2008-2010 (2.4L)
Your Questions, Answered
Is this PCM really ready to install out of the box?
Yes. We flash the module with the latest dealer-authorized software using the VIN you provide during checkout. This ensures it’s perfectly matched to your vehicle’s specific configuration. In most cases, you will only need to perform a simple security relearn procedure after installation.
How do I provide my VIN?
After you complete your purchase, simply reply to your order confirmation email with your 17-digit VIN, or send it to us through our website’s contact form with your order number. We cannot ship your part until we receive this information.
What if my original part number isn’t 12597125?
This module replaces several service numbers, including 12612397, 12594750, 12629019, and others listed in the product details. As long as your vehicle is on the compatibility list, this module will function correctly once programmed to your VIN.
Do I need any special tools for the installation?
For most vehicles, you will only need basic hand tools, such as a socket set and ratchet to remove the mounting bolts and disconnect the battery. No special electronic diagnostic tools are required for the installation itself.
What is your warranty policy on this part?
We stand behind our work. This part comes with a comprehensive warranty covering any defects in the module or the programming. Please see our full warranty page for complete details and duration.