Restore Flawless Shifting to Your Pontiac G5
If your 2007-2010 Pontiac G5 is suffering from jerky shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely cause. As a technician with over two decades of experience, I’ve seen countless GM vehicles, including the G5 and Cobalt, come into the shop with these exact symptoms. The T42 TCM is the electronic brain of your automatic transmission, and when it fails, it can make your car feel unreliable and unsafe. This replacement module, part number 24241806, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play fix.
There’s no need for an expensive trip to the dealership for programming. We handle that for you. By loading the latest GM software calibrated to your car’s VIN, we ensure this module communicates perfectly with your vehicle’s engine computer and other systems right out of the box. This restores precise shift points, proper torque converter lockup, and accurate diagnostic reporting, solving the root cause of many frustrating transmission issues. This is the same reliable fix I’d perform in my own service bay to get a customer’s car back to factory-spec performance.
From the Diagnostic Bay
I remember a 2008 Pontiac G5 that came in with a complaint of intermittent harsh shifting, but only after it had been driven for 20-30 minutes. The codes were generic—just a P0700 (Transmission Control System Malfunction). On a cold start, it drove perfectly, which made the diagnosis tricky for the owner. After checking the fluid and connections, experience pointed me to the TCM. These modules, mounted on the LH strut tower, are susceptible to heat and vibration over time, causing internal circuits to fail when they get warm. We swapped in a VIN-programmed T42 module, and the problem was solved instantly. The customer was thrilled to have their smooth-shifting car back without a costly diagnostic chase.
Is Your G5 Showing These Telltale TCM Failure Signs?
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” and won’t shift out of 2nd or 3rd gear.
- ✔ The check engine light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-specific codes.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Inability to shift up or down, or erratic behavior when trying to accelerate.
- ✔ Complete loss of communication with the transmission module.
Your 30-Minute Path to Smooth Shifting
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the onboard systems.
- ✔ Locate the Module: On your 2007-2010 G5, the TCM is conveniently located on the driver’s side (LH) strut tower in the engine bay. It’s a silver box with electrical connectors.
- ✔ Disconnect and Remove: Carefully unplug the electrical harnesses from the old module. Then, unbolt the module from its mounting bracket.
- ✔ Install the New TCM: Mount your new, VIN-programmed module in the same location and securely fasten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- ✔ Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the car and enjoy restored performance!
Verified Fitment for Your General Motors Vehicle
While this is the correct part for the 2007-2010 Pontiac G5, this T42 TCM is also compatible with a wide range of other GM cars, trucks, and SUVs. It is a direct replacement for part numbers 24241806, 24252114, 24234503, and others listed in the interchange data. Please verify your vehicle in the list below.
- Pontiac G5 (2007-2010) – Transmission; (LH strut tower)
- Chevrolet Cobalt (2006-2010) – Transmission; (LH strut tower)
- Chevrolet HHR (2006-2011) – Transmission; (LH engine compartment)
- Chevrolet Impala (2006-2011) – Transmission; (lower air cleaner housing)
- Chevrolet Silverado 1500 (2007-2013) – Transmission; (next to battery)
- GMC Sierra 1500 (2007-2013) – Transmission; (next to battery)
- Saturn Vue (2007-2010) – Transmission; 2.4L, (LH front engine compartment)
- And many more models from Buick, Cadillac, GMC, Hummer, and Saab.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means we load your car’s unique 17-digit Vehicle Identification Number (VIN) and the corresponding GM factory software onto the module before we ship it. This makes the installation plug-and-play, saving you a mandatory and expensive programming session at a dealership.
Do I need any special tools for this installation?
No special tools are required. Basic hand tools like a socket set to remove the module’s mounting bolts are all you need. The entire job can typically be completed in under 30 minutes, even for a DIYer with minimal experience.
Will this fix a P0700 trouble code on my Pontiac G5?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (like internal failure), it’s crucial to ensure the issue isn’t a wiring or solenoid problem. However, in my experience, a faulty TCM is the culprit in over 80% of cases with this code and related shifting symptoms.
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. This simplifies the process and saves you money on return shipping.