Restore Your Pontiac’s Performance and Reliability
Is your Pontiac G5 suffering from frustrating issues like a persistent check engine light, erratic shifting, stalling, or a complete no-start condition? These are classic signs of a failing Powertrain Control Module (PCM). Don’t let a faulty computer keep you off the road. This replacement PCM, service number 12597125, is the definitive solution to restore your vehicle’s brain, getting you back to a smooth, confident, and worry-free drive. We take the guesswork and dealership hassle out of the equation by pre-programming the module specifically to your vehicle’s VIN with the latest GM software updates. It’s a direct-fit, ready-to-install solution designed for lasting performance.
Signs Your Engine Computer Needs Attention
A failing PCM can manifest in confusing ways. If you’re experiencing any of the following, it’s time to consider a replacement. Addressing it now can prevent further component damage and ensure your vehicle runs as it should.
- ✔ Unexplained Check Engine Light (CEL) illumination.
- ✔ Stalling, stuttering, or hesitation during acceleration.
- ✔ Poor fuel economy that has gradually worsened.
- ✔ The engine cranks but refuses to start.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Communication error codes, such as U0100 (Lost Communication With ECM/PCM).
- ✔ Internal processor failure codes, like P0606.
A Mechanic’s Note: The VIN is Everything
“I remember a customer with a Chevy Cobalt who had bought a used PCM online. He spent a whole weekend trying to get it to work, only to find out it was from a car with a different transmission and emissions setup. The car ran terribly. He brought it to us, and we got him this exact pre-programmed unit. We plugged it in, performed the security relearn, and it fired right up, purring like a kitten. Providing your VIN isn’t just a step; it’s the secret to a 15-minute fix versus a weekend-long headache. We ensure the software is a perfect match for your car’s DNA.”
Guided Installation for a Confident Fix
Replacing your 2007-2010 G5 PCM is a straightforward process you can tackle with basic hand tools. Our pre-programming service handles the most complex part, leaving you with a simple physical installation.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Old Module: On most G5 and Cobalt models, the PCM is located in the engine compartment on the driver’s side, near the fuse box.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed module in the same location. Secure the bolts and then firmly reconnect the electrical harnesses until they click into place.
- Reconnect the Battery: Re-attach the negative battery terminal and tighten it securely.
- Perform Security Relearn: You will need to perform a simple key-relearn procedure to sync the new PCM with your vehicle’s anti-theft system. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. Your vehicle should then start and run correctly.
Tailored Fit for Your Ride
This module is a direct replacement for service number 12597125 and is compatible with a wide array of GM vehicles. While this is a popular 2007-2010 G5 PCM, please verify your part number and check the list below to ensure perfect compatibility.
- AURA: 2008-2009 (2.4L, w/o hybrid)
- COBALT: 2007-2010 (2.2L, 2.4L options)
- EXPRESS 1500 VAN: 2008-2009 (4.3L)
- G5: 2007-2010
- G6: 2008-2010 (2.4L options)
- HHR: 2007-2011 (2.2L, 2.4L)
- IMPALA: 2010-2011
- LUCERNE: 2009-2011 (3.9L)
- MALIBU: 2007-2012 (2.2L, 2.4L, 3.5L options)
- SAVANA 1500 VAN: 2008-2009 (4.3L)
- SIERRA 1500 PICKUP: 2007-2009 (4.3L, w/o hybrid)
- SILVERADO 1500 PICKUP: 2007-2009 (4.3L, w/o hybrid)
- SKY: 2008-2010 (2.4L)
- SOLSTICE: 2008-2010 (2.4L)
- VUE: 2008-2010 (2.4L)
Frequently Asked Questions
Do I need to do anything after installing this PCM?
Yes. While we handle the programming, you will need to perform a standard security relearn procedure (also known as a Passlock or anti-theft relearn). This process syncs the new computer to your vehicle’s keys and is simple to do at home with no special tools required. Instructions are readily available online for your specific model.
How do I provide my VIN number?
After you complete your purchase, please send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. The VIN is typically found on your driver’s side dashboard (visible through the windshield) or on the driver’s door jamb sticker.
Is this a plug-and-play part?
Because it comes pre-programmed to your VIN, it is as close to plug-and-play as possible. The only additional step is the security relearn procedure, which is a necessary part of the vehicle’s design when a major computer is replaced.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. It’s crucial to properly diagnose the problem first. This module is designed to fix issues originating from the computer itself, not from other faulty sensors or mechanical problems on the vehicle.
What if my original part number isn’t listed?
This module replaces several service numbers, including 12612397, 12594750, 12629019, and others listed in the description. If your number is on that list, this part is a compatible replacement. If you’re unsure, please contact us with your VIN and original part number before ordering.