If your 2007-2009 Saturn Aura is suffering from jarring shifts, getting stuck in gear, or has an illuminated check engine light, you’re likely dealing with a failing Transmission Control Module (TCM). As an automotive technician with over two decades of diagnostic experience, I’ve seen countless drivers worry they need a costly transmission rebuild when the real culprit is this electronic module. This T42 TCM, part number 24235732, is the definitive, hassle-free solution to restore your vehicle’s drivability and peace of mind.
The TCM is the brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and monitoring system health. When it fails, communication breaks down, leading to the unpredictable and often unsafe performance you’re experiencing. Our module is a direct-fit replacement, but with one critical advantage: it arrives at your door fully programmed to your vehicle’s specific VIN. This means you can skip the expensive trip to the dealership for programming and get your car back to factory-spec performance right in your own garage.
Case Study: The Misdiagnosed Malibu
A customer brought in a 2008 Malibu with classic symptoms: it would slam into gear from a stop and refused to shift past 2nd gear on the highway. Another shop had quoted them over $3,000 for a transmission rebuild. I hooked up my scanner and saw a P0752 (Shift Solenoid ‘A’ Stuck On) code. While this points to a solenoid, my experience with these T42 modules told me to check the source. The solenoid tested fine. The real issue was a failing driver circuit inside the original TCM. We installed one of our VIN-programmed modules, cleared the codes, and the car shifted like new. The customer saved thousands and was back on the road in an hour. This is a perfect example of how our 2007-2009 Aura TCM can be the simple, correct fix.
Is Your Saturn Aura Showing These Transmission Issues?
A faulty TCM can manifest in several ways. If you notice any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Harsh, banging, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ Inability to upshift or downshift correctly.
- ✔ A sudden drop in fuel economy.
- ✔ Intermittent loss of communication with the module (a scanner can confirm this).
A Straightforward Guide to Installation
Replacing the 2007-2009 Aura TCM is a job most DIYers can handle in under 30 minutes with basic tools. For the Saturn Aura, the module is typically located on the front of the left frame rail.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the TCM: Find the module on the LH front frame rail. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unplug the wiring harnesses. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the wiring harnesses, ensuring they click securely into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and use a basic OBD2 scan tool to clear any stored trouble codes. Take the car for a test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24235732 and is interchangeable with a wide range of other GM part numbers, including 24252114, 24234503, and 24242391. While this page focuses on the 2007-2009 Aura TCM, this part fits many other vehicles. Please verify your specific model in the list below:
- Saturn Aura: 2007-2009 (Transmission; LH frame rail front)
- Chevrolet Cobalt: 2006-2010 (Transmission; LH strut tower)
- Chevrolet HHR: 2006-2011 (Transmission; LH engine compartment)
- Chevrolet Impala: 2006-2011 (Transmission; lower air cleaner housing)
- Chevrolet Malibu: 2006-2010 (Transmission; LH frame rail)
- Pontiac G6: 2006-2010 (Transmission; LH strut tower)
- Saturn Vue: 2007-2010 (Transmission; location varies by engine/drivetrain)
- …and many other GM models listed in the full fitment chart.
Frequently Asked Questions
Do I need to do any programming after I install this?
No. This module is expertly programmed to your vehicle’s VIN before shipping. It is a true plug-and-play solution, saving you a trip to the dealership.
Is this a new or used part?
This is a high-quality, OEM-spec component that has been inspected, tested, and programmed to ensure reliability and performance. It is backed by our one-year warranty.
What if my part number is slightly different?
This T42 module is interchangeable with dozens of GM part numbers. Please check the interchange list provided or contact us with your VIN, and our experts will verify compatibility for you.
Do I need to send my old TCM back?
No, there is no core charge for this part. You can keep your old module, which saves you the time and hassle of return shipping.
Will this fix a P0700 trouble code?
A P0700 code is a generic request from the TCM to turn on the check engine light. It is almost always accompanied by more specific transmission codes. A failing TCM is a very common cause of this code, and replacing it often resolves the issue.