Restore Peak Performance to Your GM Vehicle
Is your Saturn Aura, Chevy Malibu, or Pontiac G6 suffering from frustrating issues like a persistent check engine light, poor fuel economy, rough idling, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission performance. This replacement PCM, part number 12639669, is the definitive solution to restore your vehicle’s reliability and drivability. We take the guesswork out of the repair by pre-programming the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships, ensuring a seamless installation process.
From the Diagnostic Bay
We once had a 2009 Chevy HHR come into the shop with an intermittent stalling problem that had stumped two other mechanics. The owner had already replaced the spark plugs, ignition coils, and fuel pump. A quick scan showed no communication with the ECM. Before condemning the module, we always check the ‘Big 3’: power, ground, and communication lines. We found a corroded ground connection on the engine block near the module. A simple cleaning and tightening of the connection restored communication and solved the stalling. Always verify your main power and ground connections before replacing a computer—it can save you hundreds!
The Importance of a Properly Functioning 2008-2009 Aura PCM
The PCM is the brain of your vehicle’s powertrain. It constantly analyzes data from dozens of sensors to control fuel injection, ignition timing, emissions systems, and transmission shift points. When it fails, the entire system is compromised, leading to a cascade of performance problems. Simply swapping a used module from another vehicle won’t work, as it contains the incorrect software and security information. Our service ensures this module arrives with the latest GM-certified software, specifically calibrated for your car using the VIN you provide. This makes it a true plug-and-play solution for many common issues.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL)
- ✔ Engine Stalling or Misfiring
- ✔ Drastic Decrease in Fuel Economy
- ✔ Harsh or Erratic Transmission Shifting
- ✔ Failure to Pass Emissions Testing
- ✔ Vehicle Won’t Start, Despite a Good Battery and Starter
- ✔ Communication Errors with a Diagnostic Scan Tool
This module is a direct replacement for service number 12597125 and is also compatible with the following service numbers: 12612397, 126140, 12594750, 12629019, 12635902, and 12611549. It fits a wide array of General Motors vehicles beyond the Saturn Aura, including the Chevy Cobalt, HHR, Malibu, Silverado 1500 (4.3L), Pontiac G5, G6, Solstice, and more. Please verify your part number and check the detailed fitment list to ensure compatibility.
Frequently Asked Questions
Do I need to do any programming to this PCM?
No. We handle all the programming for you. Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software specific to your car before we ship it.
What is a CASE Relearn and will I need to do it?
A CASE (Crankshaft Angle Sensor Error) Relearn is a procedure that synchronizes the new PCM with your engine’s crankshaft position sensor. While the vehicle will often run without it, performing this procedure with a capable scan tool is highly recommended to ensure optimal timing, prevent misfire codes, and turn off the check engine light. Many local repair shops can perform this service for you.
Is this a simple plug-and-play installation?
For the most part, yes. The physical installation involves disconnecting the battery, unplugging the electrical connectors from the old module, removing it, and installing the new one. After reconnecting the battery, you will need to perform a security relearn procedure, which typically involves cycling the key. The CASE relearn mentioned above may also be necessary.
Where is the PCM located on my 2008 Saturn Aura?
On the 2008-2009 Saturn Aura with the 2.4L engine, the Electronic Control Module is typically located on the right-hand (passenger) side of the firewall in the engine compartment.
What information do you need from me to program the module?
We only need your 17-digit Vehicle Identification Number (VIN). This allows us to access the correct software and calibration files directly from GM’s database to ensure a perfect match for your vehicle’s specific options.