Restore Smooth Shifting to Your Pontiac G6
If you’re dealing with the frustration of a Pontiac G6 that shifts harshly, gets stuck in gear, or has a persistent check engine light, the culprit is often a failing Transmission Control Module (TCM). As an automotive technician with over two decades of experience, I’ve seen countless GM vehicles, including the G6, sidelined by faulty TCMs. This isn’t just an inconvenience; it’s a critical failure that impacts drivability and safety. This T42 series TCM, part number 24240400, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
The TCM is the brain of your automatic transmission, responsible for executing precise gear changes, managing torque converter clutch lockup, and monitoring system health. Over time, engine bay heat and vibrations can degrade internal electronic components, leading to the erratic behavior you’re likely experiencing. Instead of risking a costly and incorrect diagnosis at a shop, you can replace the faulty module yourself with a reliable, OEM-quality part that’s ready to install right out of the box.
A Technician’s Notebook: The Phantom Solenoid Code
A customer brought in a 2008 Pontiac G6 with a classic complaint: intermittent harsh 1-2 shifts and a check engine light for a P0752 (Shift Solenoid ‘A’ Stuck On). The previous shop had already replaced the solenoid twice, but the problem always returned after a few days. Knowing these T42 modules, I suspected the driver circuit inside the TCM was failing under load, not the solenoid itself. We installed one of our VIN-programmed TCMs, cleared the codes, and took it for an extended test drive. The shifting was immediately crisp and predictable. The customer called a month later to say the car had never driven better. This is a prime example of how a failing module can mimic other component failures, making a quality 2006-2010 G6 Transmission Module the correct first step in the diagnosis.
Is Your G6 Showing These Transmission Faults?
A failing TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs replacement. A new 2006-2010 G6 Transmission Module is designed to correct these issues permanently.
- ✔ Harsh, slamming, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear) and will not shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is on with Diagnostic Trouble Codes (DTCs) like P0700, P0750-P0758, or other solenoid-related faults.
- ✔ Sudden loss of communication with the transmission module (U-codes).
- ✔ Poor fuel economy due to incorrect gear selection or torque converter lockup failure.
- ✔ The transmission feels like it’s slipping between gears.
A Straightforward Guide to Installation
For the Pontiac G6, this is a repair most DIY enthusiasts can handle in their own driveway in under 30 minutes. The module is easily accessible, and our VIN programming eliminates the need for expensive dealership tools.
- 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: On the 2006-2010 Pontiac G6, the transmission control module is typically located on the driver’s side of the engine bay, mounted to the strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. 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 and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Reconnect and Verify: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any stored DTCs. Take the vehicle for a test drive to confirm smooth shifting has been restored.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24240400 and interchanges with numerous other GM service numbers. While this page focuses on the 2006-2010 G6 Transmission Module, it is also compatible with a wide range of other GM vehicles. Please verify your specific model and year from the list below.
Partial Fitment List:
- Pontiac G6 (2006-2010) – Transmission; (LH strut tower)
- Chevrolet Cobalt (2006-2010) – Transmission; (LH strut tower)
- Chevrolet HHR (2006-2011) – Transmission; (LH engine compartment)
- Saturn Aura (2007-2009) – Transmission; (LH frame rail front)
- Chevrolet Malibu (2006-2010) – Transmission; (LH frame rail)
- And many more GM models from 2006-2014.
Frequently Asked Questions
Frequently Asked Questions
What exactly does “VIN Programmed” mean?
It means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your car’s engine computer and other systems, just like an OEM part from the dealer, but without the extra cost and hassle of a programming service.
Do I need any special tools for this installation?
No. Basic hand tools, such as a socket set to remove the mounting bolts, are all that’s required. No special diagnostic computers or programming equipment are needed because we handle the programming for you.
Is there a core charge for my old module?
No, there is no core charge. You are not required to send your old, faulty part back to us, saving you time and return shipping costs.
Will this fix a P0700 trouble code?
A P0700 code is a generic fault request from the TCM to the main engine computer, telling it to turn on the check engine light. The P0700 itself doesn’t specify the problem, but it’s almost always accompanied by more specific transmission codes (like P0752). Replacing a faulty TCM will resolve the underlying issue, which in turn clears the P0700 code.
What is the warranty on this part?
This transmission control module comes with a one-year warranty, giving you peace of mind and confidence in your repair.