Is Your Pontiac G6 Shifting Erratically?
If you’re experiencing harsh shifting, delayed gear engagement, or your 2006-2010 Pontiac G6 is stuck in limp mode, a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change and ensuring smooth, efficient operation. When it fails, it can cause a cascade of frustrating and potentially damaging issues, from poor fuel economy to a complete inability to shift gears. This replacement GM T42 TCM, part number 24235732, is the definitive solution to restore your vehicle’s performance and reliability.
The Plug-and-Play Solution: Pre-Programmed for Your Vehicle
One of the biggest hurdles in replacing a modern electronic module is the need for expensive dealership programming. We eliminate that step entirely. This module is expertly programmed to your vehicle’s specific VIN before it ships. This ensures 100% compatibility with your G6’s systems right out of the box. Simply install the module, and it will communicate seamlessly with the Engine Control Module (ECM) and other vehicle systems, restoring the precise shifting logic your car was built with. No additional flashing or calibration is required.
Expert Pro Tip
Before beginning the installation, always disconnect the negative terminal of your vehicle’s battery. This not only protects you and the vehicle’s sensitive electronics from accidental shorts but also helps clear any stored adaptive learning values from the old, faulty module. After installing the new TCM and reconnecting the battery, allow the vehicle to idle for a few minutes before driving to let the systems re-synchronize.
Common Symptoms of a Failing Pontiac G6 TCM
A faulty transmission module can manifest in various ways. If you’re noticing any of the following issues, it’s a strong indication that your TCM needs replacement. Ignoring these signs can lead to more severe transmission damage over time.
- ✔ Harsh or Erratic Shifting: Gears may slam into place, or shifts may feel unpredictable and jerky.
- ✔ Delayed Engagement: A noticeable pause when shifting from Park into Drive or Reverse.
- ✔ Stuck in Gear / Limp Mode: The vehicle may refuse to shift out of a single gear (often 2nd or 3rd) to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light will illuminate on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): A scan tool will often show codes like P0700 (Transmission Control System Malfunction) or various solenoid-specific codes (e.g., P0750, P0753, P0758).
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lock-up issues caused by a bad TCM can lead to a significant drop in MPG.
- ✔ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM at all, indicating a complete module failure.
Installation and Compatibility
For the 2006-2010 Pontiac G6, the TCM is conveniently located at the left-hand (driver’s side) strut tower in the engine compartment, making for a straightforward replacement that typically takes less than 30 minutes. This module is also a direct replacement for a wide range of other GM vehicles that use the T42 controller and 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is interchangeable with numerous service numbers, including 24252114, 24234503, 24230461, 24242391, and more, ensuring you get the correct part for your repair. Built to strict OEM standards and backed by a one-year warranty, this module is the reliable choice for getting your car back to peak performance.
Frequently Asked Questions
Do I need to take my car to the dealer after installing this part?
No. This Transmission Control Module is pre-programmed to your vehicle’s VIN before shipping. This makes it a true plug-and-play solution, requiring no additional programming or calibration from a dealership. Simply install it, and you’re ready to go.
Where is the TCM located on my Pontiac G6?
On the 2006-2010 Pontiac G6, the TCM is typically found in the engine bay, mounted to the driver’s side (LH) strut tower. It’s an accessible location that makes for a quick and easy replacement.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the Check Engine Light to be turned on. While this module often resolves the root cause of the P0700 code (such as internal TCM failure), it’s always wise to scan for other transmission-specific codes to confirm the diagnosis.
Is a core charge required for this part?
No, there is no core charge for this module. You can keep your old part without the hassle of needing to return it, saving you time and money.
What transmissions is this T42 module compatible with?
This T42 TCM is designed for vehicles equipped with GM’s 4-speed automatic transmissions, including popular models like the 4L60E, 4L65E, 4L70E, and 4L80E. It fits a wide array of cars, trucks, and SUVs from the mid-2000s to the early 2010s.