Is your 2008-2010 Pontiac G6 suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition? These are common indicators that the heart of your vehicle’s engine management system, the Powertrain Control Module (PCM), may be failing. Don’t let a faulty computer keep you off the road. This direct-replacement PCM, part number 12629019, is the reliable solution to restore your vehicle’s performance, efficiency, and drivability.
This isn’t just a part; it’s a complete service. We take the guesswork out of the repair by pre-programming the module specifically for your car using your Vehicle Identification Number (VIN). This critical step ensures that the PCM communicates flawlessly with your G6’s specific engine, transmission, and options package. We load the latest, most stable software updates from GM, which can often resolve underlying drivability issues and improve overall operation. When you receive the part, it’s ready for a straightforward installation, getting you back behind the wheel faster.
From the Diagnostic Bay
We had a 2009 Pontiac G6 come into the shop with a complaint of intermittent stalling at stoplights and a check engine light that would come and go. The customer had already replaced the spark plugs and an oxygen sensor with no luck. Our initial scans showed a handful of seemingly unrelated communication codes. Instead of chasing ghosts, we hooked up a scope to the main power and ground feeds at the PCM. We found that the 5-volt reference signal would occasionally drop out, causing the engine to stumble. This pointed directly to an internal failure in the original computer. We installed a VIN-programmed 2008-2010 G6 PCM, performed the security relearn, and the car ran perfectly. It’s a great example of how a single faulty module can create multiple confusing symptoms.
Symptoms of a Failing Pontiac G6 PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ A noticeable decrease in fuel economy.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
Why Choose Our Programmed 2008-2010 G6 PCM?
This module is the central command for your vehicle’s powertrain. It controls critical functions like fuel mixture, ignition timing, transmission shift points, and emissions systems. A failing unit can cripple your car’s performance. Our solution is designed for a hassle-free repair. By providing us with your VIN at checkout, you ensure that the module you receive is a perfect match for your vehicle’s factory specifications. This unit is a direct fit for modules with service numbers 12629019, 12597125, 12612397, 12594750, 12635902, and 12611549, covering a wide range of GM vehicles including the Pontiac G6, Chevy Malibu, Cobalt, HHR, and more. Please verify your original part number and consult the fitment list to confirm compatibility.
Installation is typically straightforward. After disconnecting the battery, you’ll locate and unbolt the old module, disconnect the wiring harnesses, and install the new one in its place. Once installed and the battery is reconnected, you will likely need to perform a simple security relearn procedure, which can often be done without special tools. This procedure pairs the new PCM with your vehicle’s anti-theft system. Instructions for this are readily available online or in service manuals.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is your vehicle’s main computer. It controls all aspects of engine performance, including fuel injection, spark timing, and emissions, to ensure optimal power, efficiency, and low emissions.
Do I need to have this module programmed?
No. We handle the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the correct GM software for your specific car.
Is this part difficult to install?
For someone with basic mechanical skills, the installation is a simple plug-and-play process. The main steps are disconnecting the battery, swapping the module, and reconnecting the battery. A security relearn procedure may be required, which typically takes about 30 minutes and does not require a mechanic.
How do I find my original part number?
Your original part number is printed on a sticker on the case of your existing PCM. You may need to unbolt it or use a mirror to see the label clearly. Matching this number to our list of compatible service numbers ensures a correct fit.
What happens if I forget to provide my VIN?
Providing your VIN is essential for the programming service. We will hold your order and contact you to get the VIN. We cannot ship the part until it has been correctly programmed for your vehicle.