End Your Pontiac G6 Transmission Headaches for Good
If you’re dealing with the frustration of a 2006-2010 Pontiac G6 that shifts harshly, gets stuck in gear, or throws confusing transmission codes, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen countless GM vehicles sidelined by a faulty Transmission Control Module (TCM). The T42 TCM is the electronic brain of your automatic transmission, and when it fails, it can cause a cascade of problems that make your car unreliable and unsafe to drive. This replacement TCM, part number 24235753, is the definitive solution, arriving pre-programmed to your car’s specific VIN for a true plug-and-play repair.
A Technician’s Notebook: The Intermittent G6 Shifting Nightmare
I remember a 2008 Pontiac G6 that came into my bay with a complaint of intermittent, bone-jarring shifts and occasionally getting stuck in 3rd gear. The owner had already replaced a shift solenoid with no luck. The problem was, the codes were intermittent and would clear themselves. After a long test drive with a scanner hooked up, I saw the TCM data stream drop out right before a harsh shift. The internal electronics of the original module were failing under heat. Installing a VIN-programmed T42 TCM like this one not only fixed the issue instantly but also provided the latest factory software, making the transmission shift smoother than it had in years. This is a common failure point I’ve diagnosed on hundreds of these GM platforms.
Is Your Pontiac G6 Exhibiting These Transmission Issues?
A failing TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module is the culprit. A new 2006-2010 G6 TCM is often the most direct path to a lasting fix.
- ✔ Harsh, slamming, or erratic gear changes.
- ✔ The vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission warning light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid Errors), or other communication codes.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Poor fuel economy and a feeling of lost power.
DIY-Friendly Installation Guide: Back on the Road in Minutes
One of the best features of this module is that it eliminates the need for an expensive trip to the dealership for programming. For the Pontiac G6, the TCM is conveniently located and easy to access, making this a perfect job for a DIY enthusiast. The entire process typically takes less than 30 minutes.
- 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 your 2006-2010 Pontiac G6, the TCM is located on the driver’s side of the engine bay, mounted to the LH strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. 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. Ensure 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 DTCs. Take the car for a test drive to confirm smooth shifting.
Verified Fitment for Your General Motors Vehicle
While this is the perfect 2006-2010 G6 TCM, this T42 module is also compatible with a wide range of other GM vehicles. It is a direct replacement for part numbers 24242391, 24234503, 24252114, 24235753, and more. Please verify your specific model and year below.
- Pontiac G6: 2006-2010 (LH strut tower)
- Chevrolet Cobalt: 2006-2010 (LH strut tower)
- Chevrolet HHR: 2006-2011 (LH engine compartment)
- Chevrolet Impala: 2006-2011 (lower air cleaner housing)
- Chevrolet Malibu: 2006-2010 (LH frame rail)
- Saturn Aura: 2007-2009 (LH frame rail front)
- GMC Sierra / Chevrolet Silverado 1500: 2007-2013 (next to battery)
- GMC Yukon / Chevrolet Tahoe: 2007-2009 (next to battery)
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This Transmission Control Module comes fully pre-programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you time and money.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a failing TCM is the root cause, and replacing it will resolve the P0700 and any related specific codes (like for solenoids). However, you should always ensure the transmission itself is mechanically sound.
What tools are required for installation on a Pontiac G6?
Installation is very straightforward. You will typically only need a basic socket set to remove the mounting bolts and a wrench to disconnect the battery terminal. No specialized tools are required.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or dispose of it without the hassle of returning it, making the process simpler and faster for you.
What kind of warranty is included?
This module is backed by a one-year warranty, giving you peace of mind that you’re installing a quality, reliable part that is built to last.