Restore Peak Transmission Performance in Your GM Vehicle
Is your 2007-2009 Saturn Aura, or another GM vehicle, suffering from erratic shifting, getting stuck in gear, or displaying transmission-related warning lights? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and monitoring system health. When it fails, it can lead to poor performance, decreased fuel economy, and potentially catastrophic transmission damage. This genuine OEM-quality T42 TCM, part number 24240449, is the definitive solution to restore your vehicle’s smooth and reliable operation.
From the Diagnostic Bay
We had a 2008 Chevy Silverado in the shop last month with a classic case of TCM failure. The customer complained of harsh, unpredictable shifts and the truck being stuck in ‘limp mode’ (3rd gear only). The dealership quoted him over a thousand dollars for a new module plus programming fees. He brought it to us, and we installed this exact VIN-programmed T42 module. In under an hour, the truck was shifting like it just rolled off the factory floor. No expensive dealer visit, no complex programming—just a straightforward, effective repair that got him back on the road safely.
The Critical Role of the Saturn Aura TCM
The Saturn Aura TCM acts as the central command for the 4-speed automatic transmission found in a wide array of GM cars, trucks, and SUVs. It constantly analyzes data from sensors like vehicle speed, engine RPM, and throttle position to determine the perfect moment to shift gears. A healthy TCM ensures seamless acceleration, optimal fuel efficiency, and a comfortable ride. However, due to its location in the engine bay, it’s exposed to constant heat cycles and vibrations, which can lead to internal electronic failure over time. Replacing a faulty module is not just about fixing a symptom; it’s about restoring the core logic of your vehicle’s drivetrain.
Key Symptoms of a Failing T42 TCM
- ✔️ Harsh or Delayed Shifting: The most common symptom. You may feel a significant jolt or lag when the transmission shifts up or down.
- ✔️ Stuck in Gear / Limp Mode: The vehicle may refuse to shift out of a single gear (often 2nd or 3rd) as a protective measure.
- ✔️ Check Engine Light: Fault codes like P0700 (Transmission Control System Malfunction) or various solenoid-specific codes (P0750, P0751, etc.) will be stored.
- ✔️ No Communication: A scan tool may be unable to communicate with the TCM, indicating a complete internal failure.
- ✔️ Poor Fuel Economy: Inefficient shifting and incorrect torque converter lockup can cause a noticeable drop in MPG.
- ✔️ Erratic Instrument Cluster Behavior: In some cases, a failing TCM can cause flickering lights or inaccurate gear indicators.
The Plug-and-Play Advantage: VIN Programming Included
Why choose our T42 TCM? The single biggest advantage is our complimentary VIN programming service. When you order, we flash the module with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software updates. This means the part arrives at your door ready for immediate installation. There is no need for an expensive trip to the dealership for programming with a Tech2 or MDI scan tool. This process ensures perfect communication between the TCM, the Engine Control Module (ECM), and other vehicle systems, guaranteeing optimal performance from the moment you install it. This is the most efficient and cost-effective way to complete the repair on your Saturn Aura TCM or other compatible GM model.
This module is a direct replacement for a wide range of service numbers, including 24252114, 24234503, 24230461, 24240449, and many more, making it a versatile solution for countless vehicles on the road. Built to stringent OEM specifications, it comes with a one-year warranty for your peace of mind.
Frequently Asked Questions
What exactly does a Transmission Control Module do?
The TCM is a computer that controls your automatic transmission. It reads data from various sensors to control shift solenoids, regulate hydraulic pressure, and engage the torque converter clutch, ensuring smooth and efficient gear changes.
Is this part difficult to install?
For most DIYers with basic tools, this is a straightforward installation. It’s typically located in the engine bay and held in by a few bolts with electrical connectors. The most important steps are disconnecting the battery first and ensuring the connectors are seated properly upon reinstallation. The entire process often takes less than 30 minutes.
Why is VIN programming so important for this part?
VIN programming loads the module with the correct software and calibration files for your specific vehicle’s engine, tire size, and other options. Without it, the transmission will not shift correctly, and you will likely have warning lights. Our pre-programming service makes this a true plug-and-play part, saving you hundreds in dealership fees.
Will this module fix my P0700 check engine light code?
A P0700 code is a generic trouble code indicating that the TCM has detected a fault. If the fault is due to an internal failure of the TCM itself, then yes, replacing it with this programmed module will resolve the issue. It’s always best to have the specific transmission codes read to confirm the diagnosis.
Is there a core charge for my old part?
No, there is no core charge required for this module. You can keep your old part, eliminating the hassle and expense of shipping it back.