Restore Peak Performance to Your Pontiac G6
Is your 2006-2009 Pontiac G6 or another compatible GM vehicle suffering from perplexing issues like a persistent Check Engine Light, rough idling, stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance, fuel economy, and emissions. A faulty ECM can disrupt the intricate balance of your engine’s operations, leading to frustrating and potentially damaging problems. This replacement Engine Control Module, part number 12602044, is the definitive solution to restore your vehicle’s reliability and drivability.
The ECM is the brain of your car’s engine. It processes data from a network of sensors to precisely control fuel injection, ignition timing, variable valve timing, and transmission shifts. When it begins to fail, the signals become erratic or stop altogether, causing a cascade of performance issues. Don’t let a malfunctioning computer keep you off the road. Our professionally serviced ECMs provide a reliable and cost-effective alternative to an expensive dealership visit.
From the Diagnostic Bay
We had a 2008 Pontiac G6 3.6L come into the shop with a complaint of intermittent stalling at stoplights and a check engine light with codes for multiple sensor circuits reading ‘low voltage’. The owner had already replaced the alternator and battery. After checking the main power and ground circuits to the ECM, we found them to be solid. We connected a scope and saw the 5-volt reference signal, which powers many of the engine’s sensors, was dropping out intermittently. This pointed directly to an internal failure in the ECM. We installed one of our VIN-programmed modules, performed the security relearn, and the G6 ran perfectly. It’s a great example of how a single component can create symptoms that seem to point everywhere else.
Symptoms of a Failing GM Engine Control Module
If you’re experiencing any of the following issues, a failing ECM could be the culprit. Confirming your diagnosis is the first step toward a lasting repair.
- ✔ Persistent and illuminated Check Engine Light (CEL)
- ✔ Engine stalling or shutting off unexpectedly while driving
- ✔ Rough or erratic idling
- ✔ Noticeable decrease in fuel efficiency
- ✔ Difficulty starting the engine or a complete no-start condition
- ✔ Hesitation or stumbling during acceleration
- ✔ Poor overall engine performance
- ✔ Automatic transmission shifting problems
- ✔ Communication errors with diagnostic scan tools
The Perfect Solution: A VIN-Programmed 2006-2009 G6 ECM
What sets this ECM apart is our comprehensive programming service. Before this module ships, we flash it with the latest, most stable software updates directly from GM. More importantly, we program it using the unique Vehicle Identification Number (VIN) you provide. This critical step ensures that the module is perfectly matched to your vehicle’s specific configuration, including its engine, transmission, and factory options. The result is a true plug-and-play installation experience. You can avoid the hassle and expense of towing your car to a dealership for programming. This module arrives ready to be installed, saving you time and money.
This unit is a direct replacement for a wide array of GM vehicles and is interchangeable with numerous service numbers, including 12590032, 12603530, 12605843, 12607096, 12630457, and 19210737. Please consult the detailed fitment list to confirm compatibility with your specific make, model, and year.
Frequently Asked Questions
Do I need to do any programming after I receive this ECM?
No. We program the ECM with your vehicle’s VIN before shipping. It arrives ready to install. However, on most GM vehicles, you will need to perform a simple security relearn procedure (often called a key relearn or anti-theft relearn) which can typically be done without any special tools. Instructions are readily available online for your specific model.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as the programming is essential for the part to function correctly.
Is this ECM compatible with vehicles other than the Pontiac G6?
Yes, absolutely. This ECM fits a very wide range of GM vehicles from brands like Chevrolet, Buick, Saturn, Cadillac, and more. Please refer to the detailed compatibility list on this page to ensure it matches your specific year, make, and model.
What if my original part number is not 12602044?
This module is a direct replacement for several service numbers, including 12590032, 12603530, 12605843, and others listed on the page. As long as your vehicle is on the compatibility list and your original part number is one of the listed interchanges, this ECM will work for you.
Do I need to send my old ECM back?
No core charge or return is required for this part. You can keep or responsibly dispose of your old module.