Restore Smooth Shifting to Your Saturn Aura
If your 2007-2009 Saturn Aura is suffering from jarring shifts, getting stuck in gear, or throwing transmission-related codes, the culprit is often a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty TCM can make your daily drive frustrating and unreliable. This T42 Transmission Control Module, part number 24235754, is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a true plug-and-play repair that gets you back on the road without a costly trip to the dealership.
A Technician’s Notebook: The Misleading Solenoid Code
A few months back, a 2008 Saturn Aura was brought into my bay. The owner was frustrated; he had already replaced a shift solenoid based on a P0750 series code, but the harsh 2-3 shift and intermittent limp mode persisted. A quick data stream check showed erratic commands being sent from the TCM. Over my 20+ years, I’ve seen this hundreds of times across GM platforms. The diagnostic trouble code points to a solenoid, but the root cause is the module itself failing internally. We installed a VIN-programmed 2007-2009 Aura TCM, cleared the codes, and the car shifted like new. This is a classic case where replacing the brain, not just the muscle, is the correct fix.
Is Your Saturn Aura Exhibiting These Transmission Issues?
- ✔ Unpredictable, harsh, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode,” often refusing to shift out of 2nd or 3rd gear.
- ✔ The Check Engine Light or a transmission warning light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as the general P0700 or specific solenoid codes (e.g., P0750, P0751, P0752).
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the transmission module.
A Straightforward Guide to Installation
For the Saturn Aura, this is a repair most DIY enthusiasts can handle in their own driveway in under 30 minutes. The module is located on the front of the left-hand frame rail. No complex procedures or specialized tools are required.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the TCM: On your 2007-2009 Aura, find the module mounted to the LH front frame rail.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note the retaining clips; never force them. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always best practice to use a basic OBD2 scan tool to check for and clear any stored fault codes to ensure a clean slate for the system.
Verified Vehicle Compatibility
While this is a direct-fit, programmed solution for the 2007-2009 Aura TCM, this versatile T42 module is also compatible with a wide range of other General Motors vehicles. Please verify your part number (24235754) or contact our team to confirm fitment. Key compatible models include:
- Saturn: Aura (07-09), Vue (07-10), Ion (06-07)
- Chevrolet: Silverado, Tahoe, Impala, Cobalt, HHR, Malibu
- GMC: Sierra, Yukon, Savana, Canyon, Envoy
- Pontiac: G6, Grand Prix
- Buick: LaCrosse, Lucerne, Allure
- Cadillac: DTS
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This Transmission Control Module is delivered fully programmed to your vehicle’s specific VIN. It’s ready for installation right out of the box, saving you time and hundreds of dollars in dealership fees.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer. While it doesn’t pinpoint the exact issue, it often appears when the TCM itself is failing. Replacing a faulty TCM is a very common and effective way to resolve a P0700 code and the underlying transmission problem.
Is this a reliable, long-term fix?
Absolutely. This module is built to meet or exceed OEM specifications and is rigorously tested for quality and durability. It comes with a one-year warranty to give you complete peace of mind.
What happens if I don’t replace a failing TCM?
Ignoring a faulty TCM can lead to more severe issues. Continued harsh shifting can cause premature wear on clutches and other internal transmission components, potentially leading to a complete transmission failure that is far more expensive to repair.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module or dispose of it without the hassle of returning it.