If your 2006-2010 Pontiac G6 is suffering from jerky shifting, getting stuck in gear, or has an illuminated check engine light, you’re likely dealing with a failed Transmission Control Module (TCM). As an auto repair specialist with over two decades of experience, I’ve seen countless drivers frustrated by these exact issues. The T42 TCM is the electronic brain of your automatic transmission, and when it fails, it can make your car feel unreliable and unsafe to drive. This isn’t just an inconvenience; it’s a critical component for your vehicle’s performance and longevity.
This is a direct-replacement T42 Transmission Control Module, part number 24240449, for your Pontiac G6. The most significant advantage we offer is that this module arrives at your door fully programmed to your vehicle’s specific VIN. This means you can skip the expensive trip to the dealership for programming. It’s a true plug-and-play solution designed to get your car back to shifting smoothly and efficiently, just like it did from the factory.
Case Study: A Tricky Diagnosis
A customer brought in a 2009 G6 with an intermittent problem. It would drive perfectly for days, then suddenly refuse to shift past 2nd gear (limp mode) and throw a generic P0700 transmission fault code. They’d already replaced a shift solenoid at another shop with no success. After hooking up my pro-level scanner, I noticed communication dropouts from the TCM. The internal circuitry was failing under certain thermal conditions. We installed one of our VIN-programmed T42 modules, and the problem was solved instantly. This is a classic failure mode for the 2006-2010 G6 TCM, and a pre-programmed module is the most efficient fix.
Is Your Pontiac G6 Showing These Telltale Signs?
A faulty TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Harsh, slamming, or delayed gear shifts.
- ✔ Vehicle is stuck in a single gear (often called “limp mode”).
- ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-specific faults.
- ✔ Inability to upshift or downshift properly.
- ✔ A noticeable decrease in fuel economy.
- ✔ The transmission seems to slip between gears.
A Straightforward Guide to Your G6 TCM Swap
One of the best parts about this repair is its simplicity. For the Pontiac G6, the TCM is easily accessible, making this a perfect job for a DIY enthusiast. You can have this swapped in under 30 minutes with basic hand tools.
- Safety First: Always disconnect the negative terminal from your car’s battery before starting any electronic work.
- Locate the Module: On your 2006-2010 G6, the TCM is typically located on the driver’s side of the engine bay, mounted to the strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the electrical harnesses, ensuring they click securely into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always good practice to use a scan tool to clear any stored fault codes from the system’s memory.
Verified Vehicle Compatibility
This module is a guaranteed fit for the following vehicles. Please confirm your model and year range.
- Pontiac G6: 2006, 2007, 2008, 2009, 2010 (Transmission; located on LH strut tower)
This T42 TCM, also known by service numbers 24252114, 24234503, and 24242391, is also compatible with a wide range of other GM vehicles including the Chevrolet Cobalt, HHR, Impala, Malibu; Saturn Aura, Ion, Vue; and Pontiac G5. This module is interchangeable with part numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, and 24256960.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This is the biggest benefit of our service. We program the module to your car’s VIN before we ship it. It arrives ready for a simple, plug-and-play installation, saving you time and hundreds of dollars in dealership fees.
What information do you need to program the module?
We only need your vehicle’s 17-digit Vehicle Identification Number (VIN). You can typically find this on your driver’s side dashboard (visible through the windshield) or on your vehicle’s registration or insurance card.
Will this fix a P0700 trouble code on my G6?
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. Replacing your faulty 2006-2010 G6 TCM with our programmed unit is a very common and effective solution for this code and the underlying specific codes it has stored.
Is there a core charge? Do I need to send my old part back?
No, there is absolutely no core charge. You can keep your old part or dispose of it at your convenience. We make the process as simple and hassle-free as possible.
What kind of warranty is included?
We stand behind our products with a one-year warranty. This module is built to meet or exceed OEM specifications for reliability and durability, giving you peace of mind with your repair.