Is your 2006-2010 Pontiac G6 suffering from harsh, unpredictable shifting, getting stuck in gear, or throwing transmission codes? These are classic signs of a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty TCM can make driving frustrating and unsafe. This OEM-quality T42 TCM, part number 24243921, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair that restores smooth, factory-new performance.
Case Study: A Tricky Diagnosis
I remember a 2008 Pontiac G6 that came into my shop with a complaint of intermittent, hard 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode). The customer had already spent money on a transmission fluid flush elsewhere, with no improvement. A quick scan pulled a P0752 (Shift Solenoid ‘A’ Stuck On), but testing the solenoid showed it was functioning correctly. Experience pointed me to the TCM. These T42 modules, especially after years of heat cycles under the hood, can develop internal circuit faults that send incorrect signals. After installing a VIN-programmed module, the car shifted perfectly. It’s a textbook example of why throwing parts at a problem doesn’t work; accurate diagnosis saves time and money, and this module is often the root cause.
Is Your Pontiac G6 Showing These Signs?
A failing TCM isn’t just an annoyance; it can lead to further transmission damage if ignored. Watch for these common indicators:
- âś” Harsh, slamming, or delayed gear shifts.
- âś” Vehicle is stuck in a single gear (often called “limp mode”).
- âś” The Check Engine Light or transmission warning light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) like P0700, P0750-P0758, or other solenoid-related faults are present.
- âś” Complete loss of communication with the transmission module.
- âś” Poor acceleration and reduced fuel economy.
The Power of Pre-Programmed Precision
The biggest hurdle in replacing a modern vehicle module is the need for expensive dealership programming. We eliminate that step entirely. By providing your VIN during checkout, we flash this 2006-2010 G6 Transmission Module with the latest GM-certified software specific to your car. This ensures all shift points, torque converter lockup strategies, and diagnostic parameters are perfectly calibrated right out of the box. You get a reliable, long-term fix without the extra cost and hassle of a dealer visit.
A Straightforward Guide to Installation
For the Pontiac G6, this is a repair most DIYers can handle in under 30 minutes with basic hand tools. The module is easy to access and replace.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the TCM: On the 2006-2010 G6, the transmission module is typically found mounted on the driver’s side strut tower in the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s good practice to use a basic OBD2 scanner to clear any stored fault codes from the ECU. Start the vehicle and test drive to confirm smooth shifting.
Verified Vehicle Compatibility
While this is the correct part for the 2006-2010 Pontiac G6, this versatile T42 TCM also fits a wide range of other General Motors vehicles. Please verify your part number (24243921) or consult the list below. Interchangeable part numbers include: 24252114, 24234503, 24230461, and more.
- Pontiac G6: 2006-2010 (Transmission; LH strut tower)
- Chevrolet Cobalt: 2006-2010 (Transmission; LH strut tower)
- Chevrolet HHR: 2006-2011 (Transmission; LH engine compartment)
- Chevrolet Malibu: 2006-2010 (Transmission; LH frame rail)
- Saturn Aura: 2007-2009 (Transmission; LH frame rail front)
- And many other GM models from 2006-2014.
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. This module is sold fully pre-programmed to your vehicle’s VIN. You just need to provide your VIN at checkout. This saves you a trip to the dealership and associated programming fees, making it a true plug-and-play solution.
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, simplifying the repair process for you.
What tools do I need for installation on my G6?
Installation typically only requires basic hand tools, such as a socket set to remove the mounting bolts and a flathead screwdriver to help with the connector tabs if they are stubborn. No special electronic tools are required.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECU) to turn on the check engine light. While a faulty TCM is a very common cause, this code means you need to scan the TCM itself for more specific codes (like solenoid or sensor faults). If the TCM is the source of those specific codes, then replacing it will resolve the P0700 code as well.
What is the warranty on this part?
This transmission control module comes with a one-year warranty, giving you peace of mind and confidence in the quality and reliability of your repair.