Restore Your Pontiac’s Drivability and Peace of Mind
Is your Pontiac G5 struggling with harsh, erratic shifts? Are you stuck in limp mode, staring at a check engine light that just won’t go away? As a mechanic with over two decades of experience under the hood, I’ve seen these symptoms countless times. More often than not, the culprit is a failing Transmission Control Module (TCM). This isn’t just an annoyance; it’s a critical failure that affects your car’s performance, safety, and fuel economy. This VIN-programmed T42 TCM, part number 24256960, is the definitive, reliable solution to get your G5 running smoothly again, without the exorbitant costs and hassle of a dealership visit.
A Technician’s Notebook: The Misleading Solenoid Code
Just last month, a 2008 Pontiac G5 was towed to my shop. The owner had already replaced a shift solenoid based on a P0750-series code, but the transmission was still stuck in third gear. He was frustrated and out of money. I immediately suspected the TCM. On these T42 modules, it’s incredibly common for the internal driver circuit for a specific solenoid to fail. The scan tool correctly identifies a fault in the solenoid’s circuit, but the root cause is the module itself, not the solenoid. We installed one of our pre-programmed TCMs, cleared the codes, and the car was shifting perfectly within 30 minutes. This part saved the customer from needlessly chasing down other components and got him back on the road with confidence.
Is Your Pontiac G5 Showing These Telltale Signs?
A failing TCM doesn’t heal itself; it only gets worse. Ignoring these symptoms can lead to more significant transmission damage. If you’re experiencing any of the following, it’s time to replace your module:
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, especially a general code like P0700, or specific solenoid codes (e.g., P0751, P0756).
- ✔ Inability to shift up or down, leading to poor acceleration and terrible fuel mileage.
- ✔ Intermittent loss of communication with the module, causing unpredictable behavior.
A Straightforward Guide to Your G5 TCM Installation
One of the biggest advantages of this module is its simple, plug-and-play installation. Because we program it to your vehicle’s VIN before shipping, you can perform this repair right in your driveway with basic hand tools. For the 2007-2010 G5 Transmission Module, the process is especially easy.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Module: On your Pontiac G5, the TCM is conveniently located on the driver’s side, mounted to the strut tower in the engine compartment. It’s easily accessible.
- Disconnect and Remove: Carefully unclip the electrical connectors. Be gentle with the locking tabs. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. While not always necessary, using a basic OBD2 scan tool to clear any stored fault codes is a good final step.
Verified Fitment for Your Vehicle
This T42 Transmission Control Module is a direct-fit replacement for a wide range of General Motors vehicles. While this listing is focused on the Pontiac G5, it is also compatible with the models listed below. Always verify your part number (24256960) or contact us with your VIN to ensure perfect compatibility.
- Pontiac G5 (2007-2010): Transmission; (LH strut tower)
- Chevrolet Cobalt (2006-2010): Transmission; (LH strut tower)
- Saturn Ion (2006-2007): Transmission; (behind LH strut tower)
- Chevrolet HHR (2006-2011): Transmission; (LH engine compartment)
- Pontiac G6 (2006-2010): Transmission; (LH strut tower)
- …and many other GM models including the Silverado, Tahoe, Impala, and more. See the full fitment list for details.
Frequently Asked Questions
Do I need to take my car to the dealer for programming?
Absolutely not! We handle all the programming here before we ship the part. Just provide your vehicle’s VIN during checkout, and the module will arrive ready for immediate installation. This saves you time and the typical $150+ programming fee at a dealership.
What tools are required for installation on a Pontiac G5?
You’ll only need basic hand tools. Typically, a ratchet with a 10mm socket to disconnect the battery and remove the mounting bolts is all that’s required. No special diagnostic equipment is needed.
Will this part fix a P0700 trouble code?
Yes, in many cases it will. A P0700 is a generic code indicating the TCM has detected a fault. Often, the internal failure of the original TCM is the root cause, and replacing it with this quality module will resolve the P0700 and any related specific codes.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module or recycle it locally without the hassle of shipping it back to us.
What does this part interchange with?
This module, service number 24256960, is a direct replacement for numerous other GM part numbers, including 24252114, 24234503, 24242391, and many more, ensuring broad compatibility.