Is your 2007-2009 Saturn Aura suffering from frustrating and unpredictable transmission issues? If you’re dealing with harsh gear changes, getting stuck in limp mode, or seeing that dreaded check engine light, you’re not alone. As a technician with over two decades of experience, I’ve seen countless GM vehicles sidelined by a failing Transmission Control Module (TCM). This isn’t just an annoyance; it’s a critical failure that compromises your car’s performance and safety. This T42 series TCM, part number 24235732, is the definitive, hassle-free solution to restore the smooth, reliable shifting your vehicle had when it was new.
From the Diagnostic Bay: The Misleading Solenoid Code
A customer brought in his Chevy Impala, convinced he needed a new transmission. It was shifting erratically and throwing a P0752 code (Shift Solenoid ‘A’ Stuck On). He’d already replaced the solenoid, but the problem persisted. After a quick data stream check, I noticed the TCM wasn’t commanding the solenoid correctly. The module itself had an internal short, sending false signals. We installed a VIN-programmed T42 TCM, just like this one, and the problem was solved in under an hour. He saved thousands on a transmission rebuild he didn’t need. This highlights why addressing the 2007-2009 Aura TCM first is often the smartest diagnostic step.
Is Your Saturn Aura Showing These Transmission Warning Signs?
A faulty TCM can manifest in various ways, often mimicking other transmission problems. Before you consider a costly mechanical repair, check if you’re experiencing these common symptoms:
- ✔ Abrupt, harsh, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in a single gear (often 2nd or 3rd), a condition known as “limp mode.”
- ✔ Check Engine Light or Transmission Warning Light is illuminated on your dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as the general P0700 or specific solenoid codes (e.g., P0750, P0752, P0753).
- ✔ Failure to upshift or downshift, leading to poor acceleration and decreased fuel economy.
- ✔ Intermittent loss of communication with the TCM, causing unpredictable behavior.
Get Your Aura Shifting Smoothly: A 30-Minute Install Guide
One of the best features of this module is its straightforward installation. Because it arrives pre-programmed to your vehicle’s VIN, you can perform the replacement right in your driveway, saving you a trip to the dealership and their associated programming fees. For the 2007-2009 Saturn Aura, the TCM is located on the front of the left-hand frame rail.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the Module: On your Aura, find the TCM mounted to the LH front frame rail. It will have several electrical connectors attached.
- Disconnect and Remove: Carefully unclip the wiring harnesses. Then, unbolt the old TCM from its mounting bracket.
- Install the New TCM: Mount the new module in place and securely re-fasten the bolts. Reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD2 scanner to clear any stored fault codes from the vehicle’s memory.
Verified Fitment Across a Wide Range of GM Vehicles
While this is the correct part for your 2007-2009 Aura TCM replacement, this versatile T42 module is also a direct-fit solution for an extensive list of other General Motors cars, trucks, and SUVs. Please verify your specific model and year below.
ALLURE 06-09 Transmission; (lower air cleaner housing)
AVALANCHE 1500 07-08 Transmission; (next to battery)
CANYON 08-12 Transmission; (RH rear engine compartment)
COBALT 06-10 Transmission; (LH strut tower)
COLORADO 08-12 Transmission; (RH rear engine compartment)
DTS 06-11 Transmission; (RH front engine compartment)
ENVOY 06-09 Transmission; (LH engine compartment)
EXPRESS VANS 06-14 Transmission; (RH engine compartment)
G5 07-10 Transmission; (LH strut tower)
G6 06-10 Transmission; (LH strut tower)
GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
HHR 06-11 Transmission; (LH engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
IMPALA 06-11 Transmission; (lower air cleaner housing)
ION 06-07 Transmission; (behind LH strut tower)
LACROSSE 06-09 Transmission; (lower air cleaner housing)
LUCERNE 06-11 Transmission; (LH engine compartment)
MALIBU 06-10 Transmission; (LH frame rail)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
MONTANA 06-09 Transmission; (LH strut tower)
SIERRA & SILVERADO TRUCKS 07-13 Transmission; (next to battery)
TAHOE & YUKON 07-09 Transmission; (next to battery)
TRAILBLAZER 06-09 Transmission; (LH engine compartment)
VUE 07-10 Transmission; (LH front engine compartment)
…and many more. See full list for details.
What does ‘VIN Programmed’ actually mean for me?
What does ‘VIN Programmed’ actually mean for me?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This makes the unit truly plug-and-play. You can install it yourself without needing expensive programming tools or a trip to the dealership, saving you time and money.
Will this fix a P0700 transmission fault code?
A P0700 code is a general fault code indicating the TCM has detected a problem. Often, replacing a faulty TCM will resolve the P0700 and any related specific codes (like for solenoids or sensors). However, it’s always wise to ensure the wiring and connectors are in good condition during installation.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part that has been expertly tested and programmed for reliability. It is backed by our one-year warranty, ensuring dependable performance and peace of mind for your repair.
Do I need to send my old TCM back?
No, there is no core charge or need to return your old part. You can complete the repair without the hassle of shipping a core back, making the process faster and more convenient.