Is Your Saturn SKY Running Rough? The PCM Might Be the Culprit.
If your 2008, 2009, or 2010 Saturn SKY is experiencing frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition, the problem may lie with a failing Powertrain Control Module (PCM). The PCM is the electronic brain of your vehicle, orchestrating everything from fuel injection and spark timing to transmission control and emissions. When it begins to fail, it can cause a cascade of confusing and performance-robbing symptoms that can be difficult to diagnose.
This is a direct replacement PCM, part number 12630186, designed to restore your vehicle’s original performance and reliability. We take the guesswork out of the repair by pre-programming the module specifically for your car. All we need is your vehicle’s 17-digit Vehicle Identification Number (VIN) at checkout. Our technicians will flash the unit with the latest, most stable software updates directly from GM, ensuring optimal function and communication with all other modules in your Saturn SKY.
From the Diagnostic Bay
We had a 2009 Pontiac Solstice (which shares the same platform and PCM as the SKY) come into the shop with a bizarre, intermittent issue. The owner complained that the car would randomly lose power and the throttle would become unresponsive for a few seconds before returning to normal. There were no consistent trouble codes, just a few random communication errors stored. We checked wiring, sensors, and the throttle body itself, but everything tested fine. On a hunch, we monitored the PCM’s internal voltage and temperature data during a long test drive. We discovered that after about 20 minutes of driving, the processor was overheating, causing it to momentarily glitch. Swapping in a correctly programmed PCM like this one solved the problem completely. It’s a perfect example of how a failing computer can create phantom issues that seem unrelated.
Symptoms of a Failing 2008-2010 Saturn SKY PCM
A failing engine computer can manifest in many ways, from subtle annoyances to critical failures. If you’re noticing any of the following, it’s time to consider your PCM as a potential cause:
- ✔ Persistent Check Engine Light (CEL) with various or no specific codes.
- ✔ Engine stalling or cutting out unexpectedly while driving.
- ✔ Difficulty starting the engine, or a complete no-start condition.
- ✔ Noticeable decrease in fuel efficiency for no apparent reason.
- ✔ Rough or erratic idling.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
A Seamless, Programmed Solution
Don’t let a complex computer repair keep you off the road. Our process is designed to be as simple as possible. By providing your VIN, you receive a module that is ready for installation. Once installed, you may need to perform a simple security relearn procedure, which can often be done without special tools and involves a sequence of key cycles. This ensures the new PCM properly syncs with your vehicle’s anti-theft system. This module is a direct replacement for multiple service numbers, ensuring wide compatibility.
This part is a confirmed fit for the following service numbers: 12597125, 12612397, 12594750, 12629019, 12635902, 12611549, and more.
Broad GM Vehicle Compatibility
While this is a primary solution for the Saturn SKY, this versatile E37-style PCM was used across a wide range of General Motors vehicles. Please verify your part number to ensure compatibility. This module is also found in models such as:
- Chevrolet Cobalt (2007-2010)
- Chevrolet HHR (2007-2011)
- Chevrolet Malibu (2007-2012)
- Chevrolet Silverado 1500 (2007-2009 with 4.3L)
- GMC Sierra 1500 (2007-2009 with 4.3L)
- Pontiac G5/G6 (2007-2010)
- Pontiac Solstice (2008-2010)
- Saturn Aura (2008-2009)
- Saturn VUE (2008-2010)
Frequently Asked Questions
Do I need to have this PCM 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 vehicle.
What information do you need from me?
We require your 17-digit Vehicle Identification Number (VIN). This allows us to access the exact factory software and calibrations for your car’s engine, transmission, and options.
Is any additional setup required after I install it?
In most cases, you will need to perform a security relearn procedure (also known as a Passlock or anti-theft relearn). This syncs the new computer to your car’s keys and security system. This procedure typically takes about 30 minutes and does not require a scan tool. A Crankshaft Variation Relearn (CASE relearn) may also be needed, which does require a capable scan tool.
How do I find the part number on my old computer?
The part number is printed on a large sticker on the case of your existing PCM. You will typically see the Service Number (SERV. NO.) clearly labeled. Matching this number ensures you are ordering the correct hardware.
Will this fix my car’s problem for sure?
This module will correct any issues directly caused by a faulty PCM. However, it is crucial to properly diagnose your vehicle, as similar symptoms can be caused by bad sensors, wiring issues, or mechanical problems. This part is not a ‘test’ part and is a final sale item due to its electronic nature.