Finally, A Real Fix for Your Saturn Aura’s Transmission Problems
If you’re dealing with a 2007-2009 Saturn Aura that shifts hard, gets stuck in gear, or has a persistent check engine light, you know how frustrating it can be. As a technician with over two decades of experience, I’ve seen countless GM vehicles sidelined by a faulty Transmission Control Module (TCM). The T42 module is the electronic brain of your automatic transmission, and when it fails, it can cause a cascade of issues that feel like a major mechanical failure. But the fix is often simpler and more affordable than you think.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a high-quality T42 TCM, interchangeable with part number 24230461, and pre-program it to your vehicle’s specific VIN. This crucial step eliminates the need for an expensive trip to the dealership for programming. It arrives at your door ready to be installed, allowing you to restore your vehicle’s performance and drivability right in your own garage. This is the definitive solution for your 2007-2009 Aura Transmission Module, getting you back on the road with confidence.
From the Diagnostic Bay
I remember a 2008 Saturn Aura that came into the shop with the classic signs: the transmission was stuck in 3rd gear (limp mode), and the dash was lit up with a check engine light. The owner was worried about a costly transmission rebuild. After a quick scan, we pulled a P0700 (Transmission Control System Malfunction) and several solenoid-related codes. Instead of tearing into the transmission, we identified the culprit as the T42 TCM. After installing one of our VIN-programmed modules, the codes cleared, the car shifted perfectly on the test drive, and the customer drove away with a reliable car for a fraction of the cost of a new transmission.
Is Your Saturn Aura Showing These Transmission Warning Signs?
- ✔ Harsh, slamming, or erratic gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in “limp mode,” often refusing to shift out of 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated with codes like P0700, P0750, or other transmission-related DTCs.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Poor acceleration and a noticeable drop in fuel economy.
- ✔ Complete loss of communication with the transmission module, leading to a no-shift condition.
Your Straightforward 30-Minute Installation Guide
Replacing the 2007-2009 Aura Transmission Module is a job most DIYers can handle with basic tools. The module is located on the front of the left-hand frame rail.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: Find the TCM mounted to the front of the driver’s side frame rail in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses.
- Final Steps: Reconnect the battery terminal. While our VIN programming handles the critical setup, it’s always good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Fitment for Your General Motors Vehicle
This T42 TCM is a direct-fit replacement for a wide range of GM vehicles, ensuring broad compatibility. While this page focuses on the 2007-2009 Aura Transmission Module, it also fits the following models. Please verify the location noted for your specific vehicle.
- Saturn Aura: 2007-2009 (LH frame rail front)
- Chevrolet Cobalt / HHR / Impala / Malibu / Monte Carlo
- Pontiac G5 / G6 / Grand Prix
- Buick Allure / LaCrosse / Lucerne
- GMC Sierra / Yukon / Savana / Canyon / Envoy
- Chevrolet Silverado / Tahoe / Suburban / Express / Colorado
- And many more models from 2006-2014. This part is interchangeable with numbers: 24252114, 24234503, 24234274, 24235340, and others.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. This module comes fully pre-programmed to your vehicle’s VIN. It’s a plug-and-play solution that requires no additional programming or dealership visits.
Where is the TCM located on my 2008 Saturn Aura?
On the 2007-2009 Saturn Aura, the Transmission Control Module is typically mounted on the front of the left-hand (driver’s side) frame rail inside the engine compartment.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While a failing TCM is a very common cause, you should always diagnose any other specific codes that appear alongside it. In many cases, replacing the TCM resolves the root cause of the P0700 code.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part, which simplifies the process and saves you the hassle and cost of return shipping.
What is the warranty on this part?
This part is backed by our one-year warranty, giving you peace of mind and assurance in the quality and reliability of your repair.