Is Your Chevrolet Cobalt or GM Vehicle Running Poorly?
A failing Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), is the root cause of many frustrating and hard-to-diagnose vehicle problems. If you’re experiencing issues like a persistent check engine light, stalling, poor fuel economy, or a complete no-start condition, the ECM could be the culprit. As the central computer for your engine, its proper function is critical for performance, emissions, and reliability. This replacement module, service number 12597125, is the definitive solution to restore your vehicle’s factory operation.
From the Diagnostic Bay
We once had a 2009 Chevy HHR come into the shop that had its owner chasing ghosts for months. The car would randomly stall at red lights and had an intermittent check engine light for an oxygen sensor circuit. The owner had already replaced both O2 sensors, the MAF sensor, and even the throttle body based on advice from forums. After hooking up our professional scan tool, we noticed the live data stream from the ECM was erratic—voltage readings were jumping all over the place. We swapped in a known-good, programmed ECM, and every single issue disappeared instantly. It’s a classic case where the component controlling the sensors is the actual problem, not the sensors themselves.
The Direct Solution: A VIN-Programmed 2007-2010 Cobalt ECM
Don’t let a faulty computer keep you off the road. This unit is a direct-fit replacement for a wide range of General Motors vehicles, including the Chevrolet Cobalt, Malibu, HHR, Silverado, and Pontiac G5, G6, and Solstice. We take the guesswork out of the repair by programming the module specifically to your vehicle’s Vehicle Identification Number (VIN) before it ships. This ensures that it has the latest GM software updates and is calibrated to the specific options and systems your car was built with. When you receive it, it’s ready for a straightforward installation, getting you back on the road quickly and confidently.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is on with various or no specific codes
- ✔ Engine stalling or misfiring intermittently
- ✔ Vehicle won’t start or is very difficult to start
- ✔ Noticeable decrease in fuel efficiency
- ✔ Automatic transmission shifting harshly or erratically
- ✔ Loss of power and poor acceleration
- ✔ Communication errors with diagnostic scan tools
This module is a reliable replacement for multiple service numbers, including 12612397, 12594750, 12597125, 12629019, 12635902, and 12611549. By providing us with your VIN upon purchase, you guarantee a component that is perfectly matched to your vehicle’s specifications, eliminating the need for expensive dealership programming.
Frequently Asked Questions
Is this module ready to install right out of the box?
Yes, it is. We program the module with the latest GM software using the VIN you provide. This means it’s ready for installation upon arrival. In some cases, a simple security relearn procedure, which can be done without special tools, may be required after installation. We include instructions for this common procedure.
What is the difference between an ECM and a PCM?
The terms are often used interchangeably. ECM stands for Engine Control Module, while PCM stands for Powertrain Control Module. A PCM controls both the engine and the transmission, while an ECM typically just controls the engine. For most modern GM vehicles like the ones this part fits, the unit is a PCM, but it is commonly referred to as an ECM.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty ECM, then this part will be the solution. However, it’s crucial to ensure the vehicle has been properly diagnosed. This module will not fix issues caused by other failing components like sensors or wiring problems.
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 have this information, as the programming is essential for the part to function in your car.
Does this fit vehicles other than the Chevy Cobalt?
Absolutely. This ECM is compatible with a wide array of GM vehicles, including the Pontiac G5, G6, Saturn Aura, Chevy Malibu, HHR, and certain trucks like the Silverado 1500 with the 4.3L engine. Please review the detailed fitment list on this page to confirm compatibility with your specific year, make, and model.