End Frustrating Shifting Problems in Your Pontiac G6
If you’re dealing with a Pontiac G6 that shifts harshly, hesitates between gears, or has a lit Check Engine light, you’ve likely pinpointed the culprit: a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can make a reliable car feel unpredictable and unsafe. This isn’t just an annoyance; it’s a critical component failure that affects performance, fuel economy, and your peace of mind. This VIN-programmed T42 TCM is the definitive, hassle-free solution to restore your vehicle’s smooth operation.
This module, corresponding to part number 24235340, is the electronic brain of your automatic transmission. It precisely controls shift points, torque converter clutch engagement, and line pressure. When it fails, the symptoms are unmistakable. We take the guesswork and high dealership costs out of the equation. By programming this module to your car’s specific Vehicle Identification Number (VIN) before shipping, we ensure it’s ready for immediate installation right out of the box. No expensive trips to the dealer for programming are necessary.
From the Diagnostic Bay: A Common G6 Shifting Problem
A customer brought in their 2008 Pontiac G6, complaining it was “slamming” into gear and occasionally felt stuck in 3rd gear (limp mode). The dash was lit up with a Check Engine light. A quick scan pulled code P0700 (Transmission Control System Malfunction) and a P0752 for a stuck shift solenoid. While the solenoid code pointed to a specific part, my experience with these platforms suggested the root cause was often electrical, not mechanical. We checked the wiring and found no issues. The real problem was the TCM itself providing erratic commands. After installing one of our pre-programmed modules, all codes cleared and the car shifted like new. It’s a classic failure scenario for the 2006-2010 G6 TCM, and this part is the reliable fix.
Is Your Pontiac G6 Showing These Telltale Signs?
A failing TCM doesn’t heal itself; it only gets worse. If you’re experiencing any of the following, it’s time for a replacement. Catching it early can prevent further damage to your transmission’s mechanical components.
- ✔ Harsh, jerky, or delayed gear shifts.
- ✔ Vehicle is stuck in one gear (often called ‘limp mode’).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0751, P0752, or other solenoid-related codes.
- ✔ Poor acceleration and a noticeable drop in fuel efficiency.
- ✔ The transmission seems to slip out of gear unexpectedly.
- ✔ Complete loss of communication with the transmission module.
Your Step-by-Step Installation Guide
One of the best features of this part is its simple, DIY-friendly installation. For the Pontiac G6, the process is especially straightforward. You’ll need basic hand tools and about 20-30 minutes.
- Safety First: Pop the hood and disconnect the negative terminal from your vehicle’s battery. This prevents any electrical shorts and helps reset the vehicle’s computer systems.
- Locate the TCM: On your 2006-2010 G6, the TCM is conveniently located on the driver’s side of the engine bay, mounted to the strut tower. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the electrical connectors from the old module. Then, unbolt the module from its mounting bracket. Keep the hardware, as you will reuse it.
- Install the New Module: Mount your new, pre-programmed TCM onto the bracket using the original hardware. Securely re-attach the electrical connectors. You should hear a ‘click’ as they lock 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 OBD2 scan tool, use it to clear any stored fault codes. Take the car for a test drive to confirm the shifting issues are resolved.
Verified Fitment for Your Vehicle
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles, ensuring OEM-level function and reliability. While this page focuses on the 2006-2010 G6 TCM, it is also compatible with the models listed below. Please verify your model and the location notes for a perfect match. This module is interchangeable with part numbers 24252114, 24234503, 24230461, 24234274, 24235754, and more.
Do I need to get this module programmed by a dealer?
Do I need to get this module programmed by a dealer?
No. We handle all the programming for you before we ship the part. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready for plug-and-play installation, saving you hundreds of dollars in dealership fees.
What happens if I don’t provide a VIN?
Providing your VIN is essential for us to program the module correctly for your specific vehicle’s software and calibrations. If a VIN is not provided, we cannot guarantee compatibility or proper function, and your order may be delayed or canceled.
Is there a core charge for my old part?
No, there is no core charge. You are not required to send your old, faulty module back to us. You can keep it or dispose of it at your convenience.
Will this fix a P0700 code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a failing TCM is the source of this code and replacing it will resolve the issue. However, it’s always wise to check for other specific transmission codes (like solenoid or sensor codes) that can accompany it.
What is the warranty on this part?
This Transmission Control Module comes with a one-year warranty, giving you confidence in the quality and durability of your repair.