Is your Pontiac G5, Cobalt, or Malibu giving you headaches with unpredictable stalling, a stubborn check engine light, or baffling performance drops? You’re not just dealing with an inconvenience; you’re losing the reliable, smooth ride you depend on. The brain of your vehicle’s engine, the Powertrain Control Module (PCM), is often the culprit behind these frustrating and hard-to-diagnose issues. This is your direct-fit, permanent solution to reclaim your vehicle’s performance and your peace of mind.
We take the guesswork and expensive dealership trips out of the equation. This module, service number 12597125, arrives at your doorstep fully programmed to your vehicle’s specific VIN. We load the latest, most stable software updates from GM, ensuring optimal communication between your engine and transmission. This isn’t just a replacement part; it’s a restoration of your car’s original factory performance and efficiency.
Warning Signs and How to Overcome Them
If you’re noticing any of the following, a failing PCM could be the cause. Replacing it can solve these issues and prevent further damage:
- ✔ Persistent Check Engine Light (CEL) with codes like P0601, P0602, P0606.
- ✔ Unexplained drops in fuel economy.
- ✔ Engine stalling, stuttering, or refusing to start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass emissions testing.
- ✔ Communication errors with diagnostic scan tools.
Guided Installation to Restore Your Ride
You can do this. With basic tools and a little patience, you can get your car back on the road. Here’s a simple guide to installing your Programmed 2007-2010 G5 PCM:
- Safety First: Always disconnect the negative terminal of your vehicle’s battery before starting any electrical work. This prevents accidental shorts and protects the electronics.
- Locate the Old Module: On most compatible vehicles like the G5 or Cobalt, the PCM is found in the engine bay, typically on the driver’s side near the front of the vehicle, sometimes under the air cleaner box or battery tray.
- Disconnect and Remove: Carefully unplug the electrical harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- Install Your New PCM: Mount the new module securely in place of the old one. Reconnect the electrical harnesses, ensuring they click firmly into place. A secure connection is critical.
- Power Up: Reconnect the negative battery terminal.
- Perform Security Relearn: Your vehicle’s anti-theft system needs to recognize the new PCM. This is usually a simple procedure: Turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds. Repeat this cycle 3 times. The engine should then start and run normally.
From the Trenches: The Phantom Misfire
“We had a 2009 Malibu in the shop that was driving the owner crazy. It had a random, intermittent misfire that no one could pin down. Plugs, coils, injectors—all replaced. The issue persisted. After hours of diagnostics, we traced it to the PCM’s injector driver circuit, which was failing intermittently when it got hot. We installed one of these VIN-programmed modules, and the car ran like it just rolled off the assembly line. It’s a reminder that sometimes, the problem lies in the vehicle’s brain, and the right fix brings immediate relief.”
Tailored Fit for Your GM Vehicle
This module is a direct replacement for service numbers 12612397, 12594750, 12597125, 12629019, 12635902, and 12611549. It is guaranteed to fit the following models and engine configurations. Please confirm your vehicle is on this list before ordering.
- 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 Express 1500 Van: 2008-2009 (4.3L)
- Chevrolet Silverado 1500 Pickup: 2007-2009 (4.3L, w/o hybrid)
- GMC Savana 1500 Van: 2008-2009 (4.3L)
- GMC Sierra 1500 Pickup: 2007-2009 (4.3L, w/o hybrid)
- Pontiac G5: 2007-2010
- Pontiac G6: 2008-2010 (2.4L)
- Pontiac Solstice: 2008-2010 (2.4L)
- Saturn Aura: 2008-2009 (2.4L, w/o hybrid)
- Saturn Sky: 2008-2010 (2.4L)
- Saturn Vue: 2008-2010 (2.4L)
After your purchase, simply reply to your order confirmation email with your vehicle’s 17-digit VIN. We’ll handle the programming and ship your Programmed 2007-2010 G5 PCM promptly.
Frequently Asked Questions
What does ‘pre-programmed to my VIN’ actually mean?
It means we flash the module with the specific software and calibrations your exact vehicle requires based on its Vehicle Identification Number (VIN). This includes engine and transmission parameters, tire size, and any factory options. This ensures it works seamlessly with your car right out of the box, avoiding a costly trip to the dealership for programming.
Will I need to do anything after I install it?
Yes, you will need to perform a simple ‘Security Relearn Procedure’ so your vehicle’s anti-theft system recognizes the new module. This procedure typically involves cycling the ignition key and does not require any special tools. We include instructions to make it easy.
Where can I find my vehicle’s VIN?
Your 17-digit VIN can be found on your vehicle’s registration, your insurance card, or on the driver’s side of the dashboard visible through the windshield.
Is this a new or used part?
This is a professionally restored and tested original equipment (OEM) module. Each unit undergoes a rigorous inspection and validation process to ensure it meets or exceeds factory specifications for performance and reliability, providing you with a dependable and cost-effective solution.
What if my original part number isn’t on the list?
The service numbers listed are the most common, but there can be others. As long as your vehicle’s year, make, model, and engine match our fitment list, this module will be the correct replacement. The VIN programming ensures it is a perfect match for your specific vehicle.