Is Your Vehicle Suffering from Mysterious Engine Problems?
If your Pontiac G5, Chevy Cobalt, Malibu, or another compatible GM vehicle is experiencing frustrating issues like a persistent Check Engine Light, poor fuel economy, stalling, or a complete no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. The PCM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions controls. When it fails, it can create a cascade of problems that are difficult to diagnose and can leave you stranded.
This replacement PCM, service number 12611549, is the definitive solution to restore your vehicle’s performance and reliability. It’s not just a part in a box; it’s a fully programmed, plug-and-play solution tailored specifically to your car. We flash the module with the latest OEM software updates from General Motors using the Vehicle Identification Number (VIN) you provide. This critical step ensures that the computer communicates flawlessly with all other modules in your vehicle, eliminating compatibility issues and ensuring all systems function exactly as the factory intended.
From the Diagnostic Bay
We had a 2009 Chevy HHR come into the shop with a list of complaints: intermittent stalling at stoplights, a flashing check engine light, and a transmission that shifted harshly between first and second gear. The owner had already replaced the throttle body and a couple of sensors with no success. After hooking up our scanner, we saw a jumble of communication error codes (U-codes) and implausible sensor readings. Instead of continuing to chase individual parts, we inspected the PCM. We found subtle signs of internal failure. By installing a VIN-programmed PCM like this one, we resolved all the issues in one go. The engine ran smoothly, the transmission shifted perfectly, and all the codes cleared. It’s a classic case of the root cause being the computer, not the components it’s monitoring.
Symptoms of a Failing Powertrain Control Module
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ Decreased fuel efficiency for no apparent reason.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Unexplained warning lights on the dashboard, such as traction control or ABS.
The Right Solution for Your 2007-2010 G5 PCM
Don’t settle for a generic, unprogrammed module that will cause more headaches than it solves. This PCM is a direct-fit replacement for a wide range of GM vehicles and is guaranteed to be compatible when programmed to your VIN. It is a reliable replacement for multiple service numbers, including 12597125, 12612397, 12594750, 12629019, 12635902, and 12611549. The programming process ensures that all vehicle-specific parameters, such as tire size, gear ratios, and security information (anti-theft), are correctly configured. While installation is straightforward, some vehicles may require a simple security or CASE (Crankshaft Angle Sensor Error) relearn procedure, which can often be performed without specialized tools. Get your vehicle back on the road with confidence by installing a module that’s prepared correctly from the start.
Do I need to have this PCM programmed?
No, we handle the programming for you before shipment. Simply provide us with your vehicle’s VIN during or after checkout, and we will flash the module with the correct, updated GM software for your specific vehicle. This makes installation much simpler.
What is a CASE relearn and will I need to perform one?
A CASE (Crankshaft Angle Sensor Error) relearn procedure synchronizes the new PCM with your engine’s crankshaft position sensor. Many GM vehicles require this after a PCM replacement to clear certain trouble codes (like P1336) and ensure optimal engine timing. This can often be done with a capable bi-directional scan tool.
Is this a plug-and-play part?
Because we program it to your VIN, it is as close to plug-and-play as possible. You will install the module, and in some cases, you may need to perform a simple security relearn procedure (often involving turning the key on and off) or the CASE relearn mentioned above. This ensures the anti-theft system recognizes the new computer.
How do I find my original part number?
Your original part number is printed on a sticker on the PCM itself. However, this module replaces several different service numbers. As long as your vehicle’s year, make, model, and engine match the fitment list, we can program this module to work perfectly for you.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM also controls the transmission’s functions. If your shifting issues are caused by faulty electronic commands from a failing module, this replacement part will resolve them. However, it will not fix internal mechanical failures within the transmission itself.