If your Saturn Aura is suffering from harsh, delayed, or unpredictable shifting, the problem often lies with a failing Transmission Control Module (TCM). As a seasoned technician with over two decades of experience, I’ve seen countless drivers worry they need a full transmission rebuild when the real culprit is this electronic brain. This OEM-quality T42 TCM, part number 24252114, is the definitive, hassle-free solution to restore your vehicle’s drivability and peace of mind.
The TCM is the nerve center of your automatic transmission. It processes data from various sensors to control shift points, torque converter lockup, and line pressure. When it fails, communication breaks down, leading to the frustrating and sometimes dangerous symptoms you’re experiencing. Our module solves this by arriving at your door fully programmed to your vehicle’s specific VIN. This means no expensive trips to the dealership for flashing or calibration. It’s a true plug-and-play repair that both professional mechanics and determined DIYers can appreciate.
From the Diagnostic Bay: A Common Misdiagnosis
A few months back, a 2008 Saturn Aura was towed into my shop. The owner was convinced his transmission was toast. It was stuck in 3rd gear (limp mode) and had a check engine light on. He’d already gotten a quote for thousands for a transmission replacement. I hooked up my scan tool and pulled a P0700 (Transmission Control System Malfunction) and several solenoid-specific codes. Instead of condemning the transmission, I checked the TCM. After swapping in one of our pre-programmed modules, the car shifted perfectly. The customer saved a fortune and drove away in a car that felt brand new. This is why properly diagnosing the 2007-2009 Saturn Aura TCM is the first critical step.
Is Your Saturn Aura Showing These Telltale Signs?
- ✔️ Harsh, slamming shifts or erratic gear changes.
- ✔️ Vehicle is stuck in a single gear (limp mode) and won’t shift up or down.
- ✔️ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔️ Diagnostic Trouble Codes (DTCs) are present, especially P0700, P0750, or other solenoid-related faults.
- ✔️ A noticeable decrease in fuel economy due to inefficient shifting.
- ✔️ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔️ Complete loss of communication with the transmission module.
Your 30-Minute Path to a Smooth Ride
Installing your new 2007-2009 Saturn Aura TCM is a straightforward job that you can complete with basic hand tools. The module is typically located on the front left frame rail. Following these steps will ensure a successful installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic repair. This prevents electrical shorts and helps reset the vehicle’s systems.
- Locate the Old Module: On the Saturn Aura, you’ll find the TCM mounted to the front portion of the driver’s side frame rail.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note the locking tabs to avoid damage. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place and securely reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. While the module is pre-programmed, it’s always good practice to use a basic OBD2 scanner to clear any stored fault codes. Take the vehicle for a test drive to confirm smooth shifting.
Verified Fitment for Your General Motors Vehicle
This T42 TCM is the correct replacement for a wide array of GM vehicles, ensuring broad compatibility. It is interchangeable with part numbers 24242391, 24234503, 24255280, and more. While this page focuses on the 2007-2009 Saturn Aura TCM, this part also fits the following models (please verify location and options):
- Saturn Aura: 2007-2009 (LH frame rail front)
- Chevrolet Cobalt/HHR/Impala/Malibu: Various years (check specific location)
- Pontiac G5/G6/Grand Prix: Various years (typically LH strut tower)
- GMC/Chevrolet Trucks & SUVs (Silverado, Tahoe, Yukon, etc.): Various years (often next to the battery)
- Buick Allure/LaCrosse/Lucerne: Various years (check specific location)
- …and many other vehicles listed in the original fitment chart.
Do I need to get this TCM programmed by a dealer?
Do I need to get this TCM programmed by a dealer?
No. The biggest benefit of our service is that we program the module to your vehicle’s VIN before shipping it. This makes the installation plug-and-play, saving you the time, cost, and hassle of a dealership visit.
What is a core charge? Do I need to send my old part back?
We do not require a core charge. You can keep your old part, which simplifies the process for you. No need to worry about packaging and shipping the old module back to us.
Where is the TCM located on my 2008 Saturn Aura?
For the 2007-2009 Saturn Aura, the Transmission Control Module is typically found mounted on the front of the left-hand (driver’s side) frame rail in the engine compartment.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating a problem within the transmission control system. In many cases, a faulty TCM is the root cause. If your diagnosis has pointed to the module itself, replacing it with our programmed unit is the correct fix to clear this and related codes.
What kind of warranty is included?
We stand by the quality of our parts. This module comes with a one-year warranty, giving you confidence and protection for your repair.