Restore Flawless Shifting to Your Saturn Aura
If you’re dealing with the frustrating and unpredictable behavior of a failing transmission, you’re not alone. As a technician with over two decades of experience, I’ve seen countless GM vehicles, including the Saturn Aura, come into the shop with symptoms that point directly to a faulty Transmission Control Module (TCM). This isn’t just an inconvenience; it’s a safety and reliability issue. This T42 TCM, part number 24255280, is the definitive solution to get your vehicle driving like new again. It arrives pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and complex programming procedures. It’s a true plug-and-play fix designed for both professional installers and determined DIYers.
Case Study: A Tricky Diagnosis
A customer brought in their 2008 Saturn Aura with a complaint that baffled a few other shops: intermittent harsh downshifts when coming to a stop, but only after the car was fully warmed up. There were no consistent trouble codes, just a generic P0700 (Transmission Control System Malfunction) that would pop up and disappear. We checked the fluid, solenoids, and wiring, all of which seemed fine. From experience, I know these T42 modules can develop internal heat-related failures that don’t always throw a specific code. We installed one of our VIN-programmed TCMs, and the problem vanished instantly. The pre-programming ensured the module communicated perfectly with the car’s engine computer and body control module, restoring the precise shift logic GM intended. It turned a frustrating diagnostic puzzle into a simple, 30-minute fix.
Is Your Saturn Aura Showing These Transmission Warning Signs?
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in “limp mode,” often refusing to shift out of 2nd or 3rd gear.
- ✔ The Check Engine Light or a dedicated transmission warning light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758 (solenoid circuit faults), or U-codes indicating communication loss.
- ✔ A noticeable drop in fuel economy or a transmission that seems to be overheating.
- ✔ Complete failure to engage gears or move when shifting from Park.
Your 30-Minute Path to a Smooth-Shifting Ride
Installing your new 2007-2009 Aura Transmission Module is a straightforward process that requires basic hand tools and can be completed in your own driveway. For the 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: Find the old TCM on the LH frame rail at the front of the engine compartment. It’s a silver box with large electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harnesses. Be gentle with the plastic tabs, as they can become brittle over time. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new module securely onto the bracket and firmly reconnect the wiring harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect and Verify: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. Take it for a test drive to confirm that shifting is smooth and all warning lights are off. While not always necessary, clearing any stored codes with a basic OBD2 scanner is good practice.
Verified Fitment Across the GM Family
While this is the perfect solution for your Saturn Aura, this versatile T42 TCM is also compatible with a wide array of other General Motors vehicles. It serves as a direct replacement for multiple part numbers, including 24252114, 24234503, 24242391, and more. It’s the go-to module for repairing transmissions in popular models such as:
- Chevrolet Cobalt, HHR, Impala, Malibu, Silverado, and Tahoe
- GMC Canyon, Sierra, and Yukon
- Pontiac G5, G6, and Grand Prix
- Buick Allure, LaCrosse, and Lucerne
- Saturn Vue and Ion
- And many others from 2006-2014.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means we load your car’s unique Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it works perfectly with your vehicle’s specific configuration right out of the box, saving you a trip to the dealer for expensive programming.
Do I need any special tools for this installation?
No. Basic hand tools like a socket set and a screwdriver are all that’s typically required. The most important part is ensuring the battery is disconnected before you start.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. If the root cause is the TCM itself, then yes, replacing it with this module will resolve the code and the underlying issue.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old part or dispose of it without the hassle of needing to send it back to us.
What kind of warranty comes with this module?
This module is backed by our comprehensive one-year warranty, giving you confidence and peace of mind in your repair.