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 throws a check engine light, you’re not alone. The Transmission Control Module (TCM) is the brain of your automatic transmission, and when it fails, it can cause a host of drivability problems. This OEM-quality T42 TCM, part number 24234274, is the definitive solution for your 2006-2010 Pontiac G6, arriving pre-programmed to your vehicle’s VIN for a true plug-and-play repair.
Case Study: A Tricky Diagnosis
I recently had a 2008 G6 in my bay with classic symptoms: intermittent hard 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode). The owner had already replaced a shift solenoid with no luck. A scan showed a P0700 (Transmission Control System Malfunction) but no specific solenoid codes this time. Experience pointed me toward the TCM. These modules, especially on the G6, are located on the LH strut tower, where they’re exposed to heat and vibration. After confirming power and ground were good, we installed one of our VIN-programmed modules. The difference was immediate. Crisp, clean shifts were restored, and the customer avoided a costly diagnostic runaround at the dealership.
Is Your G6 Showing These Transmission Red Flags?
A failing TCM doesn’t always mean a complete transmission failure. Catching it early can save you from more significant damage. Look out for these common indicators:
- ✔ Unpredictable or harsh shifting between gears.
- ✔ The vehicle suddenly entering limp mode, refusing to shift out of a single gear.
- ✔ An illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, particularly P0700, P0750, or other solenoid-related faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
A Straightforward Guide to Your G6 TCM Installation
One of the best features of this part is its simple installation. You don’t need to be a master mechanic to get your car running right again. For the 2006-2010 Pontiac G6 TCM, the module is located on the driver’s side strut tower in the engine bay.
- Safety First: Always disconnect the negative terminal from your car’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the TCM: Open the hood and find the TCM mounted to the driver’s side (LH) strut tower. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harnesses. They have locking tabs that need to be pressed. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the wiring harnesses. You should hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it run for a moment. While our programming handles the critical setup, it’s good practice to use a basic OBD2 scanner to clear any old fault codes from the computer’s memory.
Verified Vehicle Fitment
This T42 Transmission Control Module is a direct-fit replacement for the 2006-2010 Pontiac G6. It is also compatible with a wide range of other General Motors vehicles that use the T42 controller, and it interchanges with numerous part numbers including 24252114, 24234503, 24230461, 24235340, and more. This ensures broad compatibility and reliability across many popular models like the Chevrolet Cobalt, HHR, Malibu, Saturn Aura, and others that share this platform.
Frequently Asked Questions
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means we flash the module with your car’s specific Vehicle Identification Number (VIN) and the latest GM software before we ship it. This makes the module ready to install right out of the box, with no expensive trips to the dealership for programming required.
Can I install this part myself if I have basic tools?
Absolutely. The Pontiac G6 TCM is in a very accessible location. With a simple socket set and about 30 minutes, most DIYers can complete this job successfully. Just follow the installation steps provided.
My original part has a different service number on it. Will this work?
Yes. GM uses many different service numbers for the same part over its production life. Our module, part number 24234274, is a central interchange for dozens of other numbers. As long as your vehicle is listed in our fitment guide, this module will function correctly.
What happens if I keep driving with a bad TCM?
Continuing to drive with a faulty TCM can lead to more severe transmission damage. Poor shifting can cause excessive wear on clutches and bands, and being stuck in limp mode is a significant safety hazard. Replacing it promptly is the best course of action.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, faulty module back to us, which simplifies the repair process for you.