Restore Your Saturn Aura’s Shifting Performance
Is your 2007, 2008, or 2009 Saturn Aura experiencing frustrating transmission problems like harsh shifting, delayed gear engagement, or getting stuck in limp mode? 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 disrupt your entire driving experience and lead to more significant mechanical issues if left unaddressed. This T42 Transmission Control Module, part number YNXS, is the definitive solution, pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay
We had a 2008 Saturn Aura come into the shop with a classic complaint: erratic shifting and a persistent check engine light with code P0700 (Transmission Control System Malfunction). The owner had already spent money replacing a couple of shift solenoids based on a guess, but the problem remained. After a quick scan and data stream analysis, we saw the TCM was intermittently losing communication. Instead of chasing ghosts, we installed one of our VIN-programmed T42 modules. The installation on the LH frame rail took less than 30 minutes. After clearing the codes, the car shifted perfectly on the test drive. It’s a common scenario: drivers often replace internal transmission parts when the real culprit is the external electronic controller. This module saves time, money, and diagnostic headaches by directly addressing the root cause.
Common Symptoms of a Failing Saturn Aura TCM
A faulty transmission module can manifest in several ways. If you’re noticing any of the following issues with your Aura or another compatible GM vehicle, your TCM is the most likely cause. Confirming these symptoms can give you confidence that you’re ordering the right part for the job.
- ✔ Harsh or Erratic Shifting: Gears may bang, jerk, or shift at the wrong times.
- ✔ Delayed Engagement: A noticeable pause when shifting from Park into Drive or Reverse.
- ✔ Stuck in Gear: The vehicle may enter a “limp mode” and refuse to shift out of 2nd or 3rd gear.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light will illuminate on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): You may find codes stored such as P0700, P0750, or other solenoid-related faults.
- ✔ Poor Fuel Economy: Inefficient shifting directly leads to increased fuel consumption.
- ✔ No Communication: A scan tool may be unable to communicate with the transmission module.
The Plug-and-Play Advantage: VIN Programming Included
The biggest hurdle when replacing modern electronic modules is the need for expensive and time-consuming dealership programming. We eliminate that step entirely. Before this module ships, we program it using the latest GM software updates and your vehicle’s unique VIN. This ensures that it is perfectly matched to your Saturn Aura’s specific configuration, including its engine, transmission, and tire size. The result is a simple, straightforward installation that restores factory performance without any additional setup. Just install the part, connect the wiring, and you’re ready to drive.
Broad Compatibility Across the GM Family
While this is a perfect fit for your 2007-2009 Saturn Aura, the T42 TCM was a workhorse for General Motors, used in dozens of popular vehicles with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is a direct replacement for a wide range of part numbers, including 24252114, 24234503, 24230461, and YNXS. It fits vehicles from Chevrolet, GMC, Buick, Pontiac, Cadillac, and more. Whether you’re working on a Silverado, an Impala, a Yukon, or a G6, this module provides the same reliable, pre-programmed solution.
Frequently Asked Questions
What does this T42 Transmission Control Module do?
The T42 TCM is the central computer for your automatic transmission. It processes data from various vehicle sensors to control shift points, torque converter clutch lockup, and line pressure, ensuring smooth and efficient transmission operation.
Is this module truly plug-and-play?
Yes. By providing us with your vehicle’s VIN during checkout, we program the module specifically for your car. This means no additional programming or trips to the dealership are required. Simply install it, clear any old codes, and you’re good to go.
Where is the TCM located on my 2008 Saturn Aura?
For the 2007-2009 Saturn Aura, the transmission control module is typically located on the front portion of the driver’s side (LH) frame rail. Always disconnect the vehicle’s battery before beginning the removal and installation process.
Will this fix transmission error codes like P0700 or P0750?
Absolutely. If the module itself is the cause of these diagnostic trouble codes, replacing it with this pre-programmed unit is the correct fix. Codes like P0700 indicate a general transmission fault, which is often triggered by a failing TCM. Solenoid codes can also be caused by a faulty driver circuit within the module.
Do I need to return my old part (core)?
No. We do not require you to return your old module. There is no core charge associated with this purchase, making the process simpler and hassle-free for you.