Restore Smooth Shifting to Your 2006-2010 Pontiac G6
If your Pontiac G6 is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, the problem is very likely a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen these T42 modules cause countless headaches for GM owners. The constant stress from heat and vibration eventually compromises internal circuits, leading to the frustrating and unpredictable performance you’re likely experiencing. This isn’t just an annoyance—it’s a reliability issue that can leave you stranded. Don’t let a faulty module dictate your driving experience.
This replacement Pontiac G6 TCM, part number 24239926, is the definitive solution. We take the hassle and high cost of dealership repairs out of the equation. Each module is professionally programmed to your vehicle’s specific VIN before it ships, ensuring it communicates flawlessly with your car’s powertrain right out of the box. This means no expensive trips to the dealer for programming—just a straightforward installation to get your G6 driving like new again.
A Technician’s Notebook: The G6 That Wouldn’t Shift
A customer brought in a 2008 Pontiac G6 with a classic complaint: it would randomly refuse to shift past 2nd gear and the check engine light was on. A quick scan revealed a P0700 (Transmission Control System Malfunction) and a P0752 (Shift Solenoid ‘A’ Stuck On). While the solenoid code pointed to a specific part, my experience told me to look at the controller first. On these G6 models, the TCM is mounted right on the LH strut tower, exposed to engine bay heat. After confirming the solenoids had correct resistance, we swapped in a VIN-programmed TCM. The codes were cleared, and after a 15-minute test drive, the shifting was crisp and responsive. The original TCM was the culprit, a common failure I’ve diagnosed hundreds of times.
Is Your G6 Exhibiting These Transmission Faults?
- ✔ Abrupt, harsh, or jerky gear changes.
- ✔ The vehicle enters “limp mode,” often stuck in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758, 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.
- ✔ Complete failure to shift gears.
Your 30-Minute G6 TCM Installation Guide
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate the TCM: On your 2006-2010 Pontiac G6, the TCM is mounted to the driver’s side (LH) strut tower in the engine bay. It’s a silver box with electrical connectors.
- ✔ Disconnect and Remove: Carefully unplug the wiring harness connectors. Then, unbolt the module from its mounting bracket. Typically, this requires a 10mm socket.
- ✔ Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the wiring harnesses. Ensure they click into place.
- ✔ Final Steps: Reconnect the negative 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. Take the car for a test drive to confirm the shifting issues are resolved.
Verified Fitment for Your General Motors Vehicle
While this is the ideal solution for the Pontiac G6 TCM, this T42 module is also compatible with a wide range of other GM vehicles. It serves as a direct replacement for part numbers 24252114, 24234503, 24239926, and more. Please verify your vehicle from the list below:
Fits: Pontiac G6 (06-10), Cobalt (06-10), HHR (06-11), Impala (06-11), Monte Carlo (06-07), Saturn Aura (07-09), Ion (06-07), Vue (07-10), Chevrolet Malibu (06-10), Silverado, Tahoe, GMC Sierra, Yukon, and many more models from 2006-2014. Please confirm your specific model and year in our fitment tool.
What does “VIN Programmed” mean for me?
What does “VIN Programmed” mean for me?
It means this module is a true plug-and-play solution. We load your car’s Vehicle Identification Number (VIN) and the latest GM software onto the module before shipping. This ensures it works correctly with your engine and transmission without requiring a trip to a mechanic or dealer for expensive programming.
Do I need any special tools for installation on my G6?
No special tools are required. Basic hand tools, like a socket wrench set (specifically a 10mm socket), are all you need. The entire process typically takes less than 30 minutes.
Will this fix a P0700 code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, replacing a faulty TCM will resolve the P0700 and any related specific codes (like for solenoids). However, you should always ensure other components, like wiring, are in good condition.
Is there a core charge?
No, there is no core charge. You are not required to send your old, faulty module back to us, which saves you time and shipping costs.
How is this different from a used part from a junkyard?
A used part from another vehicle will not be programmed for your specific VIN, leading to compatibility issues and likely won’t work at all. Our modules are tested, built to OEM standards, and programmed specifically for your car, all backed by a one-year warranty.