Is Your Saturn Aura Shifting Poorly or Stuck in Gear?
If you’re experiencing frustrating transmission problems with your 2007, 2008, or 2009 Saturn Aura—such as harsh shifting, delayed gear engagement, or a persistent check engine light—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 shift with precision. When it fails, it can lead to a cascade of performance issues, poor fuel economy, and even leave you stranded. This T42 Transmission Control Module, corresponding to part number 24234503, is the definitive solution to restore your vehicle’s drivability and peace of mind.
From the Diagnostic Bay
We had a 2008 Saturn Aura come into the shop that was a real head-scratcher for the owner. It would shift perfectly when cold, but after 15 minutes of driving, it would slam into gear and eventually get stuck in 3rd (limp mode), flashing a transmission warning light. The owner had already replaced two shift solenoids with no luck. We hooked up our scanner and saw a generic P0700 code and an intermittent solenoid circuit code. Knowing these T42 modules, we suspected an internal failure in the TCM itself, which often breaks down under heat. We installed one of our VIN-programmed modules, cleared the codes, and took it for a long test drive. The shifting was buttery smooth, hot or cold. It’s a classic case where the problem isn’t mechanical, but the computer controlling it—a new, correctly programmed Saturn Aura TCM is the only proper fix.
Symptoms of a Failing 2007-2009 Saturn Aura TCM
A faulty transmission module can manifest in various ways. If you notice any of the following signs, it’s time to inspect your TCM:
- ✔️ Harsh, erratic, or delayed shifting between gears.
- ✔️ The vehicle gets stuck in a single gear (often called “limp mode”).
- ✔️ Check Engine Light or Transmission Warning Light is illuminated on the dashboard.
- ✔️ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are stored.
- ✔️ Inability to upshift or downshift, resulting in poor acceleration.
- ✔️ A noticeable decrease in fuel efficiency.
- ✔️ The transmission seems to overheat more easily than normal.
- ✔️ Complete loss of communication with the module, leading to a no-start or no-shift condition.
The Plug-and-Play Solution: VIN Programming Included
Replacing a modern electronic module isn’t just a matter of swapping parts. This Saturn Aura TCM comes pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the module communicates flawlessly with your car’s engine computer and other systems right out of the box. You get the latest factory software updates from GM, which often resolve inherent performance issues. By providing your VIN during checkout, you eliminate the need for an expensive trip to the dealership for programming, saving you time and money.
Key Features and Benefits
- Direct Fitment: Engineered to meet or exceed original equipment specifications for a perfect fit and function in your 2007-2009 Saturn Aura.
- VIN-Programmed: Arrives ready for installation with no additional programming required. This ensures optimal shift patterns, torque converter lockup, and fuel economy.
- Restores Performance: Corrects common transmission issues like hard shifts, slipping, and error codes, making your car drive like new again.
- Durable Construction: Built with high-quality components to withstand the harsh environment of the engine bay and ensure long-lasting reliability.
- Broad Compatibility: Interchangeable with a wide range of part numbers, including 24252114, 24230461, 24234274, 24239224, and more.
Simple Installation
For the Saturn Aura, the TCM is typically located on the front of the left-hand frame rail. The replacement process is straightforward for a DIY mechanic with basic tools. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Reconnect everything, and you’re ready to go. Once installed, use a standard OBD2 scanner to clear any stored fault codes to complete the process.
Frequently Asked Questions
What does “VIN Programmed” mean for this TCM?
VIN programming means we load your vehicle’s specific identification number and the latest GM-approved software onto the module before shipping it to you. This makes the part a true plug-and-play solution, as it will be perfectly matched to your car’s factory settings, avoiding compatibility issues and the need for dealership tools.
Will this fix a P0700 transmission fault code?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the Check Engine Light to be turned on. While this module often resolves the root cause (like internal circuit failure), you should always scan for more specific codes (e.g., P0751, P0756) to confirm the diagnosis. In many cases, replacing a faulty TCM will clear the P0700 code and its related specific codes.
Can I install this part myself?
Yes, installation is generally simple for those with basic mechanical skills. On the 2007-2009 Saturn Aura, the TCM is located on the front driver’s side frame rail. The process involves disconnecting the battery, removing a few bolts, and swapping electrical connectors. It typically takes less than an hour.
Is there a core charge for this part?
No, we do not require a core charge for this transmission control module. You can keep your old part without any hassle or need to ship it back to us.
What vehicles is this T42 TCM compatible with?
While this listing is for the 2007-2009 Saturn Aura, this T42 module is compatible with a vast range of 2006-2014 GM vehicles equipped with 4-speed automatic transmissions like the 4L60E and 4L65E. This includes models like the Chevy Silverado, Tahoe, Impala, GMC Sierra, Buick LaCrosse, and many others. The key is the VIN programming, which makes it specific to your vehicle.