Restore Smooth, Reliable Shifting to Your Pontiac G5
If your 2007-2010 Pontiac G5 is suffering from harsh shifts, 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 these T42 modules cause countless headaches for drivers. This isn’t just an inconvenience; it’s a critical failure that affects your car’s performance, safety, and fuel economy. This replacement 2007-2010 G5 Transmission Control Module, part number 24238856, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Pontiac G5 with a classic complaint: the transmission was banging into gear and sometimes wouldn’t shift past 2nd. The dash was lit up with a check engine light, and my scan tool pulled a generic P0700 (Transmission Control System Malfunction) code. While this code points to a transmission issue, it doesn’t pinpoint the source. After checking the fluid and wiring, my experience pointed directly to the TCM. These modules, located on the LH strut tower, are exposed to constant vibration and heat cycles, which eventually cause internal solder joints to fail. Instead of a costly diagnostic hunt and an expensive trip to the dealer for programming, we installed one of our VIN-programmed modules. In under 30 minutes, the car was shifting perfectly, all codes were cleared, and the customer was back on the road, having saved hundreds of dollars.
The Power of VIN Programming
The single biggest challenge with replacing a modern TCM is the need for dealership-level software programming. Without it, the new module won’t communicate with your vehicle’s other computers, leaving you with the same problems. We eliminate this step entirely. Simply provide your vehicle’s VIN during checkout, and our technicians will flash this module with the latest GM-certified software specific to your Pontiac G5. This ensures perfect communication, optimized shift points, and correct torque converter lockup from the moment you install it. This is the professional-grade solution that DIYers and independent shops trust for a guaranteed fix.
Is Your Pontiac G5 Exhibiting These Telltale Signs?
- âś” Harsh, erratic, or delayed gear shifts that make driving unpredictable.
- âś” The vehicle is stuck in “limp mode,” usually in 2nd or 3rd gear, with limited power.
- âś” Check Engine Light or Transmission Warning Light is on.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0751, P0756, or other solenoid-related faults.
- âś” A noticeable drop in fuel efficiency due to improper gear selection.
- âś” Complete loss of communication with the transmission module, preventing gear engagement.
A Straightforward Guide to Your G5 TCM Installation
This repair is well within the reach of a DIY enthusiast. For the 2007-2010 Pontiac G5, the TCM is conveniently located and easy to access.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: On your G5, the TCM is mounted to 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. Then, unbolt the module from its mounting bracket. There are typically just a few bolts holding it in place.
- 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. Start the vehicle and allow it to idle for a few minutes. While not always necessary, using a basic OBD2 scan tool to clear any stored fault codes is a best practice.
Verified Vehicle Compatibility
This T42 TCM, part 24238856, fits a wide range of GM vehicles. Please confirm your model and location below:
This module is a direct replacement for many vehicles, including but not limited to:
- 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 / Monte Carlo: 2006-2011 (Transmission; lower air cleaner housing)
- Chevrolet Silverado / GMC Sierra 1500: 2007-2013 (Transmission; next to battery)
- Chevrolet Tahoe / GMC Yukon: 2007-2009 (Transmission; next to battery)
- Buick LaCrosse / Allure: 2006-2009 (Transmission; lower air cleaner housing)
- Saturn Ion: 2006-2007 (Transmission; behind LH strut tower)
- Saturn Vue: 2007-2010 (Transmission; LH front engine compartment)
- …and many other GM models from 2006-2014. Please verify your part number for an exact match.
Why is VIN programming so important for this part?
Why is VIN programming so important for this part?
VIN programming loads your vehicle’s specific software onto the module. This ensures it communicates correctly with the engine computer (ECM) and other systems, controlling shift points and pressures exactly as the manufacturer intended. Without it, the module will not function correctly.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part that has been expertly prepared and programmed for your vehicle. It is backed by our one-year warranty, ensuring reliability and performance that meets or exceeds the original factory unit.
Do I need to return my old TCM?
No, there is no core charge or need to return your old, faulty module. You can dispose of it at your convenience, making the repair process simpler and faster.
Will this 2007-2010 G5 Transmission Control Module fix my P0700 code?
A P0700 code indicates a general fault within the transmission control system. In a vast majority of cases I’ve diagnosed on these vehicles, a failing TCM is the root cause. Replacing the module with our pre-programmed unit is the most common and effective fix for this code and the associated shifting symptoms.