End Frustrating Shifting Problems in Your Pontiac G6
If your 2006-2010 Pontiac G6 is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, you’re not just dealing with an annoyance—you’re facing a critical component failure. As a technician with over two decades of experience, I’ve seen countless drivers frustrated by these exact issues, often caused by a failing Transmission Control Module (TCM). This replacement T42 TCM, part number 24235732, is the definitive, reliable solution designed to restore your vehicle’s performance and your peace of mind. The best part? It arrives pre-programmed to your car’s specific VIN, eliminating the need for an expensive and time-consuming trip to the dealership.
From the Diagnostic Bay: The Case of the Hesitant G6
A customer brought in a 2008 Pontiac G6 with a classic, frustrating complaint: it would randomly refuse to shift out of 2nd gear, but only after driving for 20-30 minutes. The check engine light was on, but the codes were generic—just a P0700 (Transmission Control System Malfunction). After checking the fluid and solenoids, which all tested fine, we focused on the TCM. These modules, especially when mounted near engine heat sources like on the G6, can develop internal faults from years of heat cycles. We swapped in a VIN-programmed T42 module, and the problem was solved instantly. The car shifted perfectly, even on a long test drive. This isn’t just a part; it’s the correct diagnosis for a very common GM issue.
Is Your Pontiac G6 Showing These Transmission Faults?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution for your 2006-2010 G6 TCM failure:
- ✔ Unpredictable or harsh gear shifts that slam into place.
- ✔ The vehicle enters “limp mode,” often getting stuck in 2nd or 3rd gear.
- ✔ An illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) stored, such as P0700, P0750, or other solenoid-related faults.
- ✔ Complete failure to shift up or down, leading to poor acceleration and fuel economy.
- ✔ Loss of communication with the TCM, preventing proper diagnostics.
A Straightforward Guide to Installation
For the Pontiac G6, this is a job most DIY enthusiasts can handle in their own garage in under 30 minutes. The TCM is conveniently located and easy to access.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the Module: On the 2006-2010 Pontiac G6, the TCM is typically found mounted to the driver’s side strut tower in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a socket wrench to remove the bolts or nuts securing the old module to its bracket.
- Install the New TCM: Mount your new, VIN-programmed module in the same location and secure it with the original hardware. Reconnect the electrical harnesses firmly.
- Final Steps: Reconnect the battery terminal. While our programming handles the heavy lifting, it’s good practice to use a basic OBD2 scanner to clear any lingering fault codes from the ECU.
Will This Fit My Car?
This T42 Transmission Control Module is a direct replacement for a wide range of General Motors vehicles. While it is the correct part for the 2006-2010 G6 TCM requirement, it also fits the following models. Please verify your vehicle and the TCM location noted.
ALLURE 06-09 Transmission; (lower air cleaner housing)
AURA 07-09 Transmission; (LH frame rail front)
AVALANCHE 1500 07-08 Transmission; (next to battery)
CANYON 08-12 Transmission; (RH rear engine compartment)
COBALT 06-10 Transmission; (LH strut tower)
COLORADO 08-12 Transmission; (RH rear engine compartment)
DTS 06-11 Transmission; (RH front engine compartment)
ENVOY 06-09 Transmission; (LH engine compartment)
EXPRESS VANS 06-14 Transmission; (RH engine compartment)
G5 07-10 Transmission; (LH strut tower)
GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
HHR 06-11 Transmission; (LH engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
IMPALA 06-11 Transmission; (lower air cleaner housing)
ION 06-07 Transmission; (behind LH strut tower)
LACROSSE 06-09 Transmission; (lower air cleaner housing)
LUCERNE 06-11 Transmission; (LH engine compartment)
MALIBU 06-10 Transmission; (LH frame rail)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
SIERRA & SILVERADO TRUCKS 07-13 Transmission; (next to battery)
TAHOE & YUKON 07-09 Transmission; (next to battery)
TRAILBLAZER 06-09 Transmission; (LH engine compartment)
VUE 07-10 Transmission; (LH front engine compartment)
What exactly does ‘VIN Programmed’ mean for my G6?
What exactly does ‘VIN Programmed’ mean for my G6?
It means we load your car’s unique Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your car’s engine computer and other systems right out of the box, just like the original part. You will not need a dealership visit for programming.
Is this a difficult part to replace myself?
Not at all. For a Pontiac G6, this is one of the easier electronic module replacements. It’s located on the driver’s side strut tower and requires only basic hand tools. Most people can complete the swap in under 30 minutes.
Will this fix a P0700 check engine light code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, the problem is the TCM itself. If your vehicle is exhibiting shifting symptoms along with a P0700 code, replacing the TCM is a very common and effective repair.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or recycle it locally without the hassle of shipping it back to us.