Is your Pontiac G5, Chevy Cobalt, or another GM vehicle suffering from perplexing engine issues? A faulty Powertrain Control Module (PCM) is often the culprit behind problems like a persistent check engine light, rough idling, stalling, or a complete no-start condition. Restore your vehicle’s performance and reliability with this direct-fit replacement Engine Control Module, part number 12611549. This isn’t just a part; it’s a comprehensive solution. We program the module specifically to your vehicle’s VIN with the latest factory software from GM, ensuring it works seamlessly right out of the box.
From the Diagnostic Bay
We had a 2008 Chevy HHR come into the shop with a classic case of “parts cannon” diagnostics. The owner had replaced the MAF sensor, O2 sensors, and even the throttle body chasing an intermittent stalling issue and a P0606 code (PCM Processor Fault). The problems persisted. After hooking up our scanner and seeing erratic data pids from the engine controller, we knew the issue was internal to the PCM. Instead of another expensive guess, we installed a VIN-programmed module just like this one. The HHR immediately started and ran perfectly. It’s a powerful reminder that sometimes the ‘brain’ is the problem, not the ‘senses’.
Is Your Vehicle Showing Signs of a Failing PCM?
- ✔ Unexplained Check Engine Light (CEL) with various communication or processor codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Misfires or rough running even after replacing spark plugs and coils.
- ✔ Failure to pass an emissions test.
The Superior Solution: VIN-Programmed and Ready for Installation
Don’t waste time and money at the dealership with expensive programming fees. Our process is simple and effective. When you purchase this 2007-2010 G5 PCM, you provide us with your vehicle’s VIN. Our technicians then use that information to flash the module with the most current GM-approved calibration for your exact vehicle configuration. This critical step ensures all components, from the engine and transmission to the emissions system, communicate and function as the factory intended. This module is a direct replacement for a wide range of GM vehicles, making it a versatile and reliable choice for your repair.
This unit is compatible with multiple service numbers, including: 12597125, 12612397, 12594750, 12629019, 12635902, and 12611549. By ordering from us, you get a fully updated and tested module that is prepared for installation, getting you back on the road faster.
Frequently Asked Questions
What does the PCM do in my vehicle?
The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the central computer of your vehicle. It controls all aspects of engine performance, including fuel injection, ignition timing, emissions systems, and automatic transmission shifting, to ensure optimal power, efficiency, and low emissions.
Is this module ready to install when I receive it?
Yes! This PCM is shipped to you fully programmed to your vehicle’s specific VIN. It is ready for physical installation. In most cases, this allows for a straightforward swap with your old module.
Will I need to perform any additional procedures after installation?
In many GM vehicles, a security relearn or Crankshaft Variation (CASE) relearn procedure may be necessary after installation. This can typically be done with a capable bi-directional scan tool or by following a specific key-on/key-off sequence. This ensures the anti-theft system recognizes the new PCM and the engine runs smoothly.
How do I provide my Vehicle Identification Number (VIN)?
After completing your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or reply to your order confirmation email. We cannot program and ship the module without it.
My vehicle isn’t a Pontiac G5. Will this still fit?
Absolutely. While this is a perfect 2007-2010 G5 PCM, it also fits a wide variety of other GM models, including the Chevy Cobalt, HHR, Malibu, Silverado 1500, GMC Sierra 1500, Saturn Aura, and more. Please check the detailed fitment list on this page to confirm compatibility with your specific year, model, and engine.