Restore Flawless Shifting to Your Pontiac G6
If your 2006-2010 Pontiac G6 is suffering from jerky shifts, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As a technician with over two decades of experience under the hood, I’ve seen countless drivers frustrated by these exact issues. A faulty TCM can make your daily drive unpredictable and stressful. This isn’t just an inconvenience; it’s a critical component failure that compromises your car’s performance and safety. This replacement T42 TCM, part number 24255280, is the definitive solution to restore the crisp, reliable automatic shifting you expect from your vehicle.
The beauty of this module is that it arrives at your door completely programmed to your car’s specific Vehicle Identification Number (VIN). This means you can bypass the dealership entirely, saving you hundreds of dollars in programming fees and valuable time. It’s a true plug-and-play fix designed for both professional mechanics and determined DIYers. Once installed, it correctly manages shift points, torque converter lockup, and line pressure, effectively erasing those persistent diagnostic trouble codes and getting you back on the road with confidence.
From the Diagnostic Bay
I remember a 2008 Pontiac G6 that came into my shop a few years back. The owner was at his wit’s end. The car would intermittently refuse to shift past 2nd gear, and the check engine light was on with a general P0700 (Transmission Control System Malfunction) code. He’d already replaced a shift solenoid with no luck. After connecting my scan tool, I saw erratic data from the TCM. Heat soak from the engine compartment had caused internal circuits to fail over time—a common issue with these units. We installed a VIN-programmed 2006-2010 G6 Transmission Module, and the problem was solved instantly. The test drive was smooth, and all transmission parameters were back to OEM spec. It’s a repair that provides immediate, satisfying results.
Is Your Pontiac G6 Showing These Telltale Signs?
- ✔ Unpredictable, harsh, or delayed gear changes.
- ✔ Vehicle is stuck in “limp mode” and won’t shift out of a single gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults are present.
- ✔ A complete loss of communication with the transmission module (no-start or no-shift condition).
- ✔ Poor acceleration and a noticeable drop in fuel economy.
A Straightforward Guide to Installation
Replacing the 2006-2010 G6 Transmission Module is a job most DIYers can handle in their own garage in under an hour. For the Pontiac G6, this module is conveniently located on the driver’s side, attached to the strut tower, making access simple.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the Module: Open the hood and find the TCM on the driver’s side strut tower. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harnesses. They have locking tabs, so be gentle. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any stored codes, though the system will often relearn on its own.
Verified Vehicle Compatibility
While this is the primary module for the Pontiac G6, this T42 TCM is also compatible with a wide range of other General Motors vehicles. It directly interchanges with part numbers 24252114, 24234503, 24230461, 24240400, 24255280, and others. Below is a partial list of compatible models. Always verify fitment with your specific vehicle and part number.
- Pontiac G6: 2006-2010 (LH strut tower)
- Pontiac G5: 2007-2010 (LH strut tower)
- Chevrolet Cobalt: 2006-2010 (LH strut tower)
- Chevrolet HHR: 2006-2011 (LH engine compartment)
- Chevrolet Malibu: 2006-2010 (LH frame rail)
- Saturn Aura: 2007-2009 (LH frame rail front)
- Saturn Ion: 2006-2007 (behind LH strut tower)
- And many more GM models from 2006-2014.
Frequently Asked Questions
Do I need to take my car to a dealer for programming?
No. This module comes fully programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you time and money.
Where is the TCM located on my 2007 Pontiac G6?
On the 2006-2010 Pontiac G6, the Transmission Control Module is located in the engine bay, mounted to the driver’s side (LH) strut tower. It’s easily accessible.
Will this fix my car being stuck in 3rd gear (limp mode)?
Yes, a failing TCM is one of the most common causes of a vehicle entering limp mode. Replacing it with this pre-programmed unit is a very effective way to resolve that specific issue.
Is this part difficult to install for a beginner?
This is considered a beginner-to-intermediate level repair. With basic hand tools and our step-by-step guide, most people can complete the installation in under an hour. The key is the pre-programming, which removes the most complex step.
Does this part come with a warranty?
Absolutely. We stand behind our parts with a one-year warranty, giving you peace of mind with your purchase.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or recycle it locally without the hassle of shipping it back.