Restore Smooth, Confident Shifting to Your Saturn Aura
If you’re dealing with the headaches of a faulty transmission—like harsh gear changes, getting stuck in limp mode, or a persistent check engine light—you’re not alone. As a technician with over 20 years of experience, I’ve seen countless GM vehicles, including the Saturn Aura, suffer from these exact issues. The culprit is almost always a failing Transmission Control Module (TCM). This replacement 2007-2009 Aura Transmission Control Module, part number 24239926, is the definitive, hassle-free solution to get your car driving like new again.
The TCM is the electronic brain of your automatic transmission. It processes data from various sensors to control shift points, torque converter clutch engagement, and line pressure. When it fails, the communication breaks down, leading to the unpredictable and often jarring performance you’re experiencing. Our T42 TCM comes expertly pre-programmed to your vehicle’s specific VIN, eliminating the need for an expensive and time-consuming trip to the dealership for flashing. It’s a true plug-and-play fix designed for reliability.
From the Diagnostic Bay: The Case of the Hesitant Saturn Aura
A customer brought in their ’08 Aura with classic symptoms: it would slam into gear from a stop and sometimes refuse to shift past 2nd gear. The dash was lit up with a check engine light, and my scan tool pulled a P0700 (Transmission Control System Malfunction) and a P0752 (Shift Solenoid ‘A’ Stuck On). While the solenoid code pointed to a specific part, my experience with these T42 modules told me to look at the controller first. Heat cycles and vibration often cause internal fractures on the circuit board. We installed one of our VIN-programmed modules, cleared the codes, and the car drove perfectly. The issue wasn’t the solenoid itself, but the module’s inability to control it correctly—a common misdiagnosis that this part prevents.
Is Your Saturn Aura Showing These Transmission Warning Signs?
- ✔️ Harsh, slamming, or erratic gear shifts that make driving uncomfortable.
- ✔️ The vehicle is stuck in a single gear (often called “limp mode”) and won’t shift up or down.
- ✔️ Check Engine Light or Transmission Warning Light is illuminated with Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0751, or other solenoid-related faults.
- ✔️ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔️ A noticeable drop in fuel economy due to inefficient shifting.
- ✔️ Complete loss of communication with the transmission, preventing the vehicle from moving.
A Straightforward Guide to Your TCM Replacement
One of the best features of this module is its simple installation, which most DIYers can complete in under 30 minutes with basic hand tools. For the 2007-2009 Saturn Aura, the TCM is typically located on the front of the left-hand frame rail.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work. This prevents short circuits and helps reset the vehicle’s electronic systems.
- Locate the Module: On your Aura, find the TCM mounted to the LH frame rail in the front of the engine bay. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the wiring harnesses, ensuring they click into place to confirm a solid connection.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, use it to clear any stored fault codes. Take the vehicle for a test drive to confirm smooth shifting has been restored.
Verified Vehicle Compatibility List
This T42 TCM, part number 24239926, is a direct replacement for a wide range of General Motors vehicles. While this page focuses on the 2007-2009 Aura Transmission Control Module, it also fits the following models. Please verify the location noted for your specific vehicle:
- Saturn Aura (2007-2009): Transmission; (LH frame rail front)
- Buick Allure / LaCrosse (2006-2009): Transmission; (lower air cleaner housing)
- Chevrolet Cobalt / Pontiac G5 (2006-2010): Transmission; (LH strut tower)
- Chevrolet HHR (2006-2011): Transmission; (LH engine compartment)
- Chevrolet Impala / Monte Carlo (2006-2011): Transmission; (lower air cleaner housing)
- Chevrolet Malibu (2006-2010): Transmission; (LH frame rail)
- Pontiac G6 (2006-2010): Transmission; (LH strut tower)
- Saturn Vue (2007-2010): Transmission; (LH front engine compartment)
- …and many other GM trucks, vans, and SUVs listed in the original fitment data.
Frequently Asked Questions
Do I need to take this module to a dealer for programming?
No. This module is delivered to you pre-programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you hundreds in dealership programming fees.
Where is the TCM located on my 2008 Saturn Aura?
On the 2007-2009 Saturn Aura, the Transmission Control Module is located in the engine compartment, mounted on the front section of the left-hand (driver’s side) frame rail.
Will this fix my P0700 and solenoid codes?
In many cases, yes. A failing TCM is a very common cause of a generic P0700 code as well as specific solenoid performance codes (e.g., P0751, P0756). This is because the module itself loses the ability to properly command the solenoids, even if the solenoids are mechanically fine.
What tools are required for installation?
You will typically only need basic hand tools, such as a socket set (likely 10mm) and a ratchet to remove the mounting bolts and a wrench to disconnect the battery terminal.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or dispose of it without the hassle of returning it.