Restore Smooth Shifting to Your Pontiac G6
Is your 2006-2010 Pontiac G6 suffering from jerky shifts, getting stuck in gear, or throwing transmission-related check engine lights? These are classic signs of a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen countless GM vehicles sidelined by these exact issues. The TCM is the brain of your automatic transmission, and when it falters, it can make your car feel unreliable and unsafe. This T42 series module is the definitive solution, arriving pre-programmed to your G6’s specific Vehicle Identification Number (VIN) for a hassle-free, direct-fit replacement.
This isn’t just a part; it’s a permanent fix. By replacing your old, faulty unit, you’re restoring the precise electronic control over your transmission’s clutches, solenoids, and torque converter. The result is the smooth, predictable performance you expect from your vehicle, improved fuel economy, and the peace of mind that comes from a dependable repair. Forget expensive dealership visits for programming—this module is ready to install right out of the box.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Pontiac G6 with a complaint of intermittent harsh shifting and the transmission light popping on and off. Their local shop had already replaced a shift solenoid with no change. When I scanned it, I found a P0700 (Transmission Control System Malfunction) and an intermittent U0101 (Lost Communication with TCM). Instead of chasing electrical gremlins for hours, we checked the TCM connections—they were clean. Based on my experience with these T42 modules, the intermittent communication loss pointed directly to an internal failure of the module itself. We installed one of our VIN-programmed TCMs, and the problem was solved in under an hour. The customer was thrilled to have their car back and running perfectly without the costly guesswork.
Diagnosing a Faulty 2006-2010 G6 Transmission Module
Identifying a failing TCM is the first step toward a successful repair. If your G6 is exhibiting these behaviors, the transmission module is the most likely culprit. In my shop, these symptoms almost always lead back to the TCM, especially after ruling out low fluid levels or major mechanical failure.
- ✔ Vehicle refuses to shift out of a low gear (limp mode).
- ✔ Harsh, banging, or delayed gear engagement from a stop.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Common Diagnostic Trouble Codes (DTCs) stored, such as P0700, P0753, P0758, or other solenoid circuit codes.
- ✔ Sudden loss of power and erratic shifting behavior.
- ✔ Poor fuel mileage due to incorrect gear selection.
- ✔ Complete failure to engage any gear.
A Straightforward Guide to Installation
For the Pontiac G6, this is a repair that a confident DIYer can handle with basic tools. The module is typically located on the driver’s side of the engine bay, mounted to the strut tower, making it easily accessible.
- 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 G6, find the module on the driver’s side strut tower. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harnesses. 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. Securely reconnect the wiring harnesses, ensuring 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 lingering codes from the system.
Verified Vehicle Compatibility
This T42 Transmission Control Module, part number 24252114, is a direct replacement for a wide range of General Motors vehicles. While this page focuses on the 2006-2010 Pontiac G6, it also fits the models listed below. Please verify your model and the location notes for a perfect match.
Interchangeable Part Numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24256960, 24235732, 24235753, 24240449, YNXS
… G6 06-10 Transmission; (LH strut tower) … and many other GM models including Chevrolet Cobalt, HHR; Saturn Aura, Ion; Buick LaCrosse; and more.
Do I need to get this programmed by a dealer?
Do I need to get this programmed by a dealer?
No. This module comes fully pre-programmed to your vehicle’s VIN. It’s a true plug-and-play solution, saving you time and the high cost of dealership programming.
What tools are required for installation on a G6?
You’ll only need basic hand tools, typically a socket set to remove the mounting bolts and potentially a small flathead screwdriver to help release the connector clips. No special diagnostic equipment is needed.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module or dispose of it without the hassle of returning it.
Will this fix a P0700 code?
A P0700 is a generic code indicating the TCM has requested the check engine light. This module often resolves the underlying specific codes (like solenoid faults) that cause the P0700, but you should always diagnose the specific codes accompanying it for confirmation.
How long does the installation take?
For a Pontiac G6, the process is very straightforward due to the module’s accessible location. Most people can complete the replacement in under 30 minutes.
What if I have questions during installation?
We provide expert support. If you run into any issues, our team of experienced technicians is here to help guide you through the process.