Is Your Pontiac G6 Shifting Erratically or Stuck in Gear?
If your 2006-2010 Pontiac G6 is experiencing harsh shifts, delayed gear engagement, or has the check engine light illuminated with transmission-related codes, a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change and ensuring smooth, efficient operation. When it fails, it can lead to a host of drivability issues, poor fuel economy, and even leave you stranded. This genuine OEM-quality T42 TCM, service number 24243901, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2008 Pontiac G6 come into the shop last month. The owner was convinced the transmission was shot and was bracing for a multi-thousand dollar bill. It was slamming into gear and sometimes wouldn’t shift past 2nd. We pulled the codes and saw a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. Instead of immediately quoting a new transmission, we checked the TCM connections and data. The module was intermittently losing communication. We swapped in one of our VIN-programmed T42 modules, cleared the codes, and took it for a test drive. The car shifted like it just rolled off the factory floor. The customer saved a fortune by correctly diagnosing the electronic component instead of the entire mechanical assembly.
Signs Your G6 TCM is Failing
A faulty TCM can manifest in various ways, often mimicking a more severe mechanical transmission failure. Before condemning your transmission, check for these common electronic symptoms:
- ✔️ Harsh, jerky, or delayed shifting between gears.
- ✔️ The vehicle gets stuck in a single gear, often referred to as “limp mode.”
- ✔️ An illuminated Check Engine Light or Transmission Warning Light on your dashboard.
- ✔️ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, or other solenoid-specific faults.
- ✔️ Inability to upshift or downshift properly as you accelerate or decelerate.
- ✔️ A noticeable decrease in fuel efficiency.
- ✔️ The transmission seems to slip out of gear unexpectedly.
The Ultimate Solution: A Pre-Programmed 2006-2010 G6 Transmission Module
Replacing your faulty module is critical, and this part offers the most seamless repair process available. We pre-program this module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This crucial step ensures that the TCM has the latest GM software and is perfectly calibrated for your G6’s engine, transmission, and options. This plug-and-play solution eliminates the need for an expensive trip to the dealership for programming, saving you time and money. Simply install the module, and you’re ready to go.
This T42 TCM is a direct replacement for a wide range of GM vehicles beyond the Pontiac G6, including popular models like the Chevrolet Cobalt, HHR, Impala, GMC Sierra, and Buick LaCrosse. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24242391, and more, ensuring broad compatibility. Built to stringent OEM specifications, this module guarantees dependable performance and is backed by our one-year warranty for your peace of mind.
Simple, DIY-Friendly Installation
Installation is straightforward for anyone with basic mechanical skills. On the Pontiac G6, the TCM is typically located on the driver’s side, attached to the strut tower. The process generally takes less than 30 minutes.
- Safety First: Disconnect the negative terminal of your vehicle’s battery.
- Locate the TCM: Find the module on the driver’s side strut tower in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors and unbolt the old module from its bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM in place and securely reconnect the electrical harnesses.
- Final Steps: Reconnect the battery. While the module is plug-and-play, it’s always a good practice to use a scan tool to clear any stored DTCs from the system.
With no core charge, you don’t have to worry about the hassle and expense of returning your old part. Get your vehicle back on the road quickly and confidently with a reliable, pre-programmed transmission control module.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for this TCM?
It means we flash the module with your vehicle’s specific factory software using your VIN. This ensures the TCM communicates perfectly with your car’s engine computer and other systems, just like the original part did. This step is essential for proper transmission function and avoids the need for additional dealer programming.
Will this module fit vehicles other than a Pontiac G6?
Yes, absolutely. This T42 TCM is compatible with a vast range of 2006-2014 GM vehicles equipped with 4-speed automatic transmissions like the 4L60E and 4L65E. This includes many Chevrolet, GMC, Buick, Saturn, and Cadillac models. Please check the detailed fitment list on this page to confirm compatibility with your specific vehicle.
Is this installation difficult to do myself?
For most DIYers with basic tools, this is a very manageable job. On the 2006-2010 G6, the TCM is easily accessible in the engine compartment on the driver’s side strut tower. The entire process of swapping the modules typically takes under 30 minutes.
What happens if I continue driving with a bad TCM?
Continuing to drive with a failing TCM can cause more than just poor performance. It can lead to internal transmission damage from harsh shifting and incorrect fluid pressures, potentially turning a relatively simple electronic fix into a major mechanical repair. It’s best to address the issue promptly.
Do I need to return my old part?
No, there is no core charge for this part. You can keep your old module, which saves you the time, cost, and hassle of shipping it back.