Is your Saturn SKY experiencing frustrating issues like a persistent check engine light, poor fuel economy, stalling, or a no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance. This direct-fit replacement ECM, part number 12612397, is the definitive solution to restore your vehicle’s reliability and driving pleasure. We take the guesswork out of the repair by programming the module specifically to your vehicle’s VIN before it ships, ensuring a seamless installation process.
From the Diagnostic Bay
We had a 2009 Saturn SKY come into the shop with a very elusive problem. The owner complained of intermittent stalling, but only after driving for 20-30 minutes. No consistent trouble codes were stored, just a few random communication errors. We checked fuel pressure, ignition components, and sensor data—all looked normal. On a hunch, we monitored the live data stream from the ECM during a long test drive. Just as the car started to sputter, we saw the short-term fuel trim values go haywire before the data stream cut out completely. The ECM was failing internally under heat soak. Installing a pre-programmed replacement like this one had the SKY running perfectly within the hour, solving a problem that had stumped two other shops.
Diagnosing a Faulty 2008-2010 Saturn SKY ECM
The ECM is the brain of your vehicle, and when it starts to malfunction, it can cause a wide array of confusing symptoms. If you’re noticing any of the issues below, a failing engine computer is a likely culprit. This module is a crucial component for managing everything from the air-fuel mixture to transmission shift points. Replacing a faulty unit is essential for your vehicle’s health and performance.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Vehicle refuses to start or has difficulty starting.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Misfire codes or poor engine performance.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Automatic transmission shifting erratically or harshly.
This ECM is a direct replacement for multiple GM service numbers, including 12612397, 12597125, 12594750, 12629019, 12635902, and 12611549. It’s not just for the Saturn SKY; it also fits a wide range of other GM vehicles such as the Chevrolet Cobalt, HHR, Malibu, Silverado 1500, Pontiac G5, G6, Solstice, and more. Upon purchase, simply provide us with your vehicle’s VIN, and our technicians will flash the module with the latest GM-certified software for your specific vehicle. This ensures all factory settings are correct and that the module communicates perfectly with your car’s other systems, including the anti-theft security.
Frequently Asked Questions
Do I need to do any programming to this ECM?
No. We handle all the programming for you before shipment. You simply need to provide your vehicle’s VIN during or after checkout. The module will arrive ready for installation.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your car. We use it to load the exact software and calibrations your vehicle requires, ensuring perfect compatibility with its specific engine, transmission, and options.
Will this part be plug-and-play?
Yes, since the unit is pre-programmed to your VIN, the installation is a direct swap. In some cases, a simple CASE (Crankshaft Angle Sensor Error) relearn procedure may be required, which can be performed with a compatible scan tool.
Is this compatible with other GM vehicles?
Absolutely. This ECM fits a wide variety of GM cars and trucks from roughly 2007 to 2012, including models like the Chevy Malibu, Cobalt, HHR, Silverado, Pontiac G6, Solstice, and Saturn Aura. Please check the detailed fitment list on this page to confirm for your specific vehicle.
How do I find my original part number?
Your original part number is printed on a sticker on the casing of your current ECM. You can cross-reference it with the service numbers listed here, such as 12612397, 12597125, or 12629019, to confirm a match.