Fix Your G5’s Shifting Problems for Good
If you’re dealing with a 2007-2010 Pontiac G5 that’s shifting harshly, getting stuck in gear, or throwing transmission codes, the culprit is often a failed Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen countless drivers worry they need a costly transmission rebuild when the real issue is this electronic module. This T42 TCM is the reliable, cost-effective solution you need. It’s the brain of your automatic transmission, controlling everything from shift points to torque converter clutch engagement to ensure smooth, efficient operation.
We take the guesswork and dealer expense out of the repair. Each module is expertly programmed to your vehicle’s specific VIN before it ships. This means it arrives ready for a true plug-and-play installation, with the latest GM software updates already loaded. You can restore your car’s performance right in your own driveway and avoid the hassle and expense of a trip to the dealership for programming.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Pontiac G5 with classic signs of transmission failure: violent 1-2 shifts and a check engine light with code P0700 (Transmission Control System Malfunction). They were quoted over $2,000 for a transmission rebuild at another shop. After a quick data scan, I noticed the TCM wasn’t commanding the solenoids correctly. Instead of a major mechanical repair, the fix was a new, properly programmed TCM. We swapped this exact part in, cleared the codes, and the car drove like new. This is a perfect example of how our pre-programmed Pontiac G5 TCM saves you from unnecessary, expensive repairs.
Is Your Pontiac G5 Showing These Transmission Issues?
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ The Check Engine Light or other transmission warning lights are on.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults are present.
- ✔ Failure to upshift or downshift properly.
- ✔ Decreased fuel economy and a feeling of sluggishness.
- ✔ Complete loss of communication with the TCM.
A Straightforward Guide to Your G5 TCM Installation
For the Pontiac G5, this is a repair most DIYers can handle in under 30 minutes. The module is easy to access, making the job quick and simple.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic work.
- Locate the Module: On the 2007-2010 Pontiac G5, the TCM is located on the driver’s side, mounted to the strut tower in the engine bay.
- Disconnect and Remove: Carefully unclip the electrical connectors. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new module securely onto the bracket and reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While our programming resolves the root cause, it’s best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 TCM, part number 24235340, is a direct replacement for a wide range of General Motors vehicles. While it is guaranteed to fit the Pontiac G5 (2007-2010), it also fits other models. This part is interchangeable with service numbers including 24242391, 24234503, 24252114, and more.
Fitment locations for other common models include:
- Pontiac G5 / G6 / Pursuit (2006-2010): LH strut tower
- Chevrolet Cobalt (2006-2010): LH strut tower
- Chevrolet HHR (2006-2011): LH engine compartment
- Saturn Ion (2006-2007): Behind LH strut tower
- Chevrolet Silverado / GMC Sierra (2007-2013): Next to battery
- Chevrolet Tahoe / GMC Yukon (2007-2009): Next to battery
- Chevrolet Impala / Monte Carlo (2006-2011): Lower air cleaner housing
- Buick LaCrosse / Allure (2006-2009): Lower air cleaner housing
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready to install, saving you a trip to the dealership and additional programming fees.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without any hassle or need to return it.
What tools do I need for installation on my Pontiac G5?
You will only need basic hand tools, such as a socket set to remove the mounting bolts and a wrench to disconnect the battery. No special tools are required.
What if I install the new Pontiac G5 TCM and still have issues?
While this module fixes the most common electronic transmission faults, ensure all connectors are secure. If problems persist, there could be an underlying mechanical issue or a problem with the wiring harness. Our expert support team is here to help guide you.