Get Your Saturn Aura Shifting Smoothly Again
If you’re dealing with the frustration of a transmission that won’t shift correctly, goes into limp mode, or throws confusing error codes, you’ve come to the right place. As a technician with over two decades of experience under the hood, I’ve seen countless drivers struggle with these exact issues. A faulty Transmission Control Module (TCM) is often the culprit, and this pre-programmed T42 TCM, part number 24239224, is the definitive, hassle-free solution for your 2007-2009 Aura TCM needs.
This isn’t just a replacement part; it’s a direct fix that arrives ready to install. We handle the complex part—programming the module to your car’s specific Vehicle Identification Number (VIN)—so you don’t have to pay for expensive dealership services. This ensures that once installed, the module communicates perfectly with your vehicle’s engine and transmission, restoring the crisp, predictable shifting you expect from your Saturn.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Saturn Aura with classic transmission trouble: harsh 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode). He had already replaced two shift solenoids based on a generic code reader, but the problem persisted. After connecting my professional scan tool, I saw the tell-tale signs of intermittent communication loss from the TCM, not a solenoid failure. Heat soak was causing the internal circuits of the original module to fail. We installed one of our VIN-programmed T42 modules, and the car was shifting perfectly within 30 minutes. It’s a prime example of how targeting the root cause with the right part saves time and money.
Is Your Saturn Showing These Symptoms?
- ✔ Sudden, harsh, 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 on, with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A noticeable drop in fuel economy or signs of the transmission overheating.
- ✔ Complete loss of communication with the TCM, leading to a no-start or no-shift condition.
A Straightforward Guide to Installation
For the 2007-2009 Saturn Aura, the TCM is located on the front of the left-hand (driver’s side) frame rail. This is a job most DIYers can handle in their own driveway with basic tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: Find the TCM mounted on the LH frame rail in the front of the engine bay. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unclip the wiring harnesses from the old module. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount your new, pre-programmed TCM in the same location. Securely reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s best practice to use a basic OBD2 scan tool to clear any stored fault codes from the previous failure. Start the car and enjoy smooth shifting!
Will This Fit My Vehicle?
This T42 Transmission Control Module is a direct-fit replacement for the 2007-2009 Aura TCM and is also compatible with a wide array of other General Motors vehicles. It is interchangeable with part numbers 24252114, 24234503, 24239224, 24256960, and more. While this page is focused on the Saturn Aura, this module also fits:
- Chevrolet: Cobalt, HHR, Impala, Malibu, Monte Carlo, Silverado, Tahoe, Express Van
- GMC: Canyon, Envoy, Sierra, Yukon, Savana Van
- Pontiac: G5, G6, Grand Prix
- Buick: Allure, LaCrosse, Lucerne
- And many more models from 2006-2014. Please verify your part number or contact us with your VIN to ensure perfect fitment.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
Absolutely not. We program the module to your vehicle’s VIN before it ships. This makes installation a simple plug-and-play process, saving you time and hundreds of dollars in dealership fees.
What is a T42 TCM?
The T42 is the specific hardware platform used by General Motors for the transmission control module in many of its 4-speed automatic transmissions, like the 4L60E and 4L65E, during this era. It’s the electronic brain of your transmission.
Is there a core charge for my old part?
No, we do not require a core charge. You can keep your old part or dispose of it at your convenience without any extra hassle.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. A failing TCM is a very common cause for this code. Replacing it with our programmed module will resolve the issue if the TCM is the root cause.
What kind of warranty is included?
This module is backed by our solid one-year, hassle-free warranty, giving you peace of mind and confidence in your repair.