Is Your Saturn Aura Shifting Erratically?
If you’re experiencing frustrating transmission issues with your 2007, 2008, or 2009 Saturn Aura—such as harsh, delayed, or unpredictable shifting—a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change and ensuring smooth, efficient operation. When it begins to fail, it can lead to a cascade of problems, from poor fuel economy to your vehicle getting stuck in ‘limp mode,’ making it unreliable and unsafe to drive.
From the Diagnostic Bay
We recently had a 2008 Pontiac G6 (which shares a similar platform with the Saturn Aura) come into the shop. The owner was frustrated with intermittent ‘Check Engine’ lights and a transmission that would slam into gear one day and shift perfectly the next. He’d already replaced a couple of shift solenoids with no luck. After scanning the vehicle, we found a generic P0700 transmission fault code, but no specific solenoid codes. This pointed us directly to the module itself. We installed a VIN-programmed T42 TCM, and the car immediately returned to its smooth-shifting self. The customer was thrilled to have his car back to normal without a costly trip to the dealership for programming.
Key Symptoms of a Failing Saturn Aura TCM
Your vehicle’s computer system is designed to alert you to problems, but the signs of a faulty TCM can sometimes be mistaken for mechanical issues. By replacing the module, you can resolve these persistent electronic faults and restore your transmission’s intended performance. Watch for these common indicators:
- ✔ Erratic Shifting: Experiencing sudden harsh downshifts, delayed upshifts, or a feeling of the transmission slipping between gears.
- ✔ Warning Lights: The ‘Check Engine’ light or a specific transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Your mechanic finds codes like P0700 (Transmission Control System Malfunction) or specific solenoid codes (e.g., P0750, P0751, P0752).
- ✔ Stuck in Gear: The vehicle enters a failsafe or ‘limp mode,’ often getting stuck in 2nd or 3rd gear to prevent further damage.
- ✔ Poor Fuel Efficiency: Inefficient shifting and torque converter lock-up can lead to a noticeable drop in your MPG.
- ✔ No Communication: A scan tool may be unable to communicate with the transmission module, indicating a complete failure.
The Plug-and-Play Solution: A VIN-Programmed Module
This genuine OEM-quality GM T42 TCM is the definitive solution to your transmission woes. What sets our modules apart is our expert VIN programming service. Before shipping, we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software updates directly onto the module. This critical step ensures that the TCM is perfectly matched to your Saturn Aura’s powertrain configuration, eliminating the need for expensive and time-consuming dealership programming. It arrives at your door ready for a true plug-and-play installation.
Installation is straightforward for a DIY mechanic or any professional technician. On the 2007-2009 Saturn Aura, the TCM is typically located on the left-hand front frame rail. Simply disconnect the battery, unbolt the old module, disconnect the wiring harnesses, and install the new one in its place. Once reconnected, the pre-programmed module will immediately begin managing your transmission correctly, restoring crisp shifts and reliable performance.
Guaranteed Compatibility and Reliability
This module, service part number 24230461, is a direct replacement for a wide range of original equipment parts, ensuring a perfect fit and function. It is interchangeable with part numbers such as 24252114, 24234503, 24234274, 24235340, and many more. Built to meet or exceed original GM specifications, this part comes with a one-year warranty for your peace of mind. Don’t let a faulty computer sideline your vehicle. Restore its performance and reliability today.
Frequently Asked Questions
What does ‘VIN-programmed’ mean?
VIN programming means we flash the module with your vehicle’s specific factory software using your Vehicle Identification Number (VIN). This ensures the TCM works seamlessly with your engine, transmission, and other electronic systems right out of the box, avoiding any need for a trip to the dealer for additional calibration.
Will this fix my P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause of a P0700, it’s essential to ensure there are no underlying mechanical issues or wiring problems. In most cases where the module itself is faulty, this part will be the correct fix.
Where is the TCM located on my 2008 Saturn Aura?
For the 2007-2009 Saturn Aura, the Transmission Control Module is typically found mounted on the front portion of the left-hand (driver’s side) frame rail in the engine compartment.
Do I need any special tools for installation?
Basic hand tools, such as a socket set and ratchet, are usually all that is required to access and replace the module. The most important step is to disconnect the vehicle’s battery before you begin to prevent any electrical issues.
Is there a core charge for this part?
No, there is no core charge required for this transmission control module. You can keep your old part without the hassle of returning it.