Restore Flawless Shifting to Your Saturn Aura
Is your 2007, 2008, or 2009 Saturn Aura suffering from harsh shifting, getting stuck in gear, or displaying a check engine light? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change and ensuring smooth, efficient operation. When it fails, it can cause a host of frustrating and potentially damaging issues. This OEM-quality T42 Transmission Control Module, service part number 24243921, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2008 Saturn Aura come into the shop with the owner convinced they needed a full transmission rebuild. The car was shifting violently between first and second gear and would occasionally get stuck in third (limp mode). The codes pulled were P0700 (Transmission Control System Malfunction) and a few solenoid-specific codes. Instead of jumping to the most expensive conclusion, we checked the basics. The fluid was clean, and the wiring looked good. The culprit? The original TCM had developed an internal fault. After installing one of our pre-programmed T42 modules, the car shifted like it just rolled off the factory floor. It’s a powerful reminder that sometimes the ‘brain’ is the problem, not the ‘body’.
Symptoms of a Failing Saturn Aura TCM
A faulty TCM can manifest in various ways. If you’re experiencing any of the following, it’s highly likely your module needs replacement:
- ✔️ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔️ The vehicle enters ‘limp mode,’ often getting stuck in a single gear (like 2nd or 3rd) to prevent further damage.
- ✔️ Your dashboard is lit up with the Check Engine Light or a specific transmission warning indicator.
- ✔️ Diagnostic scans reveal trouble codes such as P0700, P0750, or other transmission-related faults.
- ✔️ A noticeable decrease in fuel economy as the transmission operates inefficiently.
- ✔️ Complete failure to shift, either up or down, or intermittent loss of communication with the module.
Why Our Programmed T42 TCM is the Superior Solution
Replacing a TCM isn’t just about swapping parts. The module must be programmed specifically for your vehicle to function correctly. Our process eliminates the extra steps, costs, and headaches associated with dealership service.
Plug-and-Play Installation: The single biggest advantage is that this module arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). We load the latest GM software updates, ensuring it communicates flawlessly with your engine computer and other systems right out of the box. No expensive trips to the dealer for programming are required.
OEM-Standard Quality: This is not a generic, one-size-fits-all part. It’s built to meet or exceed original equipment manufacturer standards for durability and performance. It’s designed to handle the demands of daily driving and restore the precise shifting logic your Saturn Aura was designed with. This high-quality construction ensures a long service life and reliable operation, backed by our one-year warranty.
Broad Compatibility: While this is the perfect solution for your Saturn Aura TCM, this T42 module is also a direct replacement for a wide array of other GM vehicles from 2006-2014 that use 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24230461, and more, making it a versatile and reliable choice for many models.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This Transmission Control Module is delivered fully programmed to your vehicle’s VIN. It is a true plug-and-play solution, designed to work immediately upon installation without requiring any additional programming or dealer intervention.
Where is the TCM located on a 2007-2009 Saturn Aura?
On the Saturn Aura models from 2007 to 2009, the Transmission Control Module is typically located on the front of the left-hand (driver’s side) frame rail in the engine compartment.
Will this module fix a 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 code (an internal TCM failure), you should always diagnose any other specific codes that accompany it. If the TCM itself is the faulty component, this replacement part will resolve the issue.
Is there a core charge for my old part?
No, there is no core charge required for this part. You can keep your old module without the hassle of shipping it back, saving you time and money.
What tools are needed for installation?
Installation is straightforward and typically requires basic hand tools like a socket set and ratchet. The process usually takes less than 30 minutes. Always remember to disconnect the negative battery terminal before starting work to ensure safety and help reset the vehicle’s electronic systems.