Restore Your Pontiac G6’s Shifting Performance
Is your 2006-2010 Pontiac G6 suffering from erratic shifting, getting stuck in gear, or displaying a persistent check engine light? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating smooth gear changes, managing torque converter lockup, and monitoring overall transmission health. When it fails, it can cripple your vehicle’s drivability and leave you stranded. This OEM-quality T42 TCM, service part number 24241806, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We recently had a 2009 Pontiac G6 towed in. The owner was frustrated because the car would barely move, feeling like it was stuck in 3rd gear—a classic case of ‘limp mode’. The dashboard was lit up with a check engine light and a transmission warning. A quick scan pulled a P0700 code, which is a general transmission fault indicator. Digging deeper, we found several solenoid circuit codes. Instead of chasing down individual solenoids, our experience pointed directly to the T42 TCM, a common point of failure. After confirming power and ground to the module were good, we installed one of our VIN-programmed TCMs. The installation, located right at the LH strut tower, took less than 20 minutes. After clearing the codes, the G6 shifted perfectly on the test drive, just like it did from the factory. The customer was back on the road the same day, avoiding a costly and time-consuming dealership visit.
Symptoms of a Failing Pontiac G6 TCM
A faulty TCM can manifest in various ways, often starting as intermittent issues before becoming a constant problem. If you’re experiencing any of the following, it’s time to inspect your transmission control module.
- ✔ Harsh or delayed gear engagement, making the car lurch forward.
- ✔ Erratic upshifting or downshifting, or a complete failure to shift gears.
- ✔ The vehicle enters ‘limp mode,’ typically stuck in 2nd or 3rd gear, to protect the transmission from further damage.
- ✔ Illumination of the Check Engine Light or Transmission Warning Light on your dash.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ A noticeable decrease in fuel economy due to inefficient gear selection.
- ✔ The transmission may feel like it’s slipping between gears.
Plug-and-Play Solution: The Power of VIN Programming
What sets this module apart is our expert VIN programming service. Dealerships require you to buy the part, install it, and then have the vehicle towed to them for expensive programming. We eliminate that entire process. Simply provide your vehicle’s VIN at checkout, and we will flash the module with the latest GM software specific to your Pontiac G6. This ensures that the TCM communicates flawlessly with your vehicle’s Engine Control Module (ECM) and other systems right out of the box. No additional calibration or setup is required. This is a true plug-and-play repair that saves you time, money, and hassle.
Installation is Simple
For the 2006-2010 Pontiac G6, the TCM is conveniently located on the LH (driver’s side) strut tower in the engine bay. The replacement process is straightforward for a DIY mechanic or any professional technician.
- Safety First: Disconnect the negative terminal of your car battery.
- Locate the Module: Find the TCM on the driver’s side strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors and unbolt the old module from its bracket.
- Install the New Module: Bolt the new, pre-programmed TCM in place and securely reconnect the wiring harnesses.
- Final Steps: Reconnect the battery. It’s recommended to use an OBD2 scan tool to clear any stored transmission codes after installation to ensure a clean slate for the new module.
Frequently Asked Questions
What does a VIN-programmed TCM mean?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and the corresponding factory software onto the module before we ship it. This makes the part fully compatible with your car’s other electronic systems, allowing for a simple plug-and-play installation without needing a trip to the dealership for further programming.
Will this module fit vehicles other than the Pontiac G6?
Yes. This T42 TCM is compatible with a wide range of 2006-2014 General Motors vehicles that use 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. This includes models from Chevrolet, GMC, Buick, Cadillac, Saturn, and more. Please check the compatibility list on our product page to confirm your specific vehicle.
Do I need to return my old TCM (core charge)?
No, there is no core charge for this part. You can keep your old module or dispose of it at your convenience without any additional fees or hassle.
Will this fix a P0700 diagnostic 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 a faulty TCM is a very common cause for a P0700 code (often accompanied by other specific transmission codes), you should always perform a full diagnosis. However, if you are experiencing shifting symptoms along with this code, replacing the TCM is the most likely solution.
Is any special tool required for installation on my G6?
Basic hand tools, such as a socket set, are all that is typically required to physically replace the module. We also highly recommend using an OBD2 scan tool to clear any fault codes from the vehicle’s memory after the installation is complete.