Restore Your Pontiac G5’s Shifting Performance
Is your 2007-2010 Pontiac G5 suffering from harsh shifting, getting stuck in gear, or displaying a check engine light with transmission codes? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing fluid pressure, and ensuring smooth, efficient operation. When it fails, your driving experience can quickly become frustrating and unsafe.
This genuine OEM-quality T42 Transmission Control Module, service part number 24235340, is the definitive solution to restore your vehicle’s transmission to factory performance. Unlike generic modules that require a costly trip to the dealership for programming, this unit comes expertly pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This means it’s a true plug-and-play component, ready for installation right out of the box, saving you time, money, and hassle.
From the Diagnostic Bay
We had a 2008 Pontiac G5 come into the shop that was stuck in 3rd gear—a classic limp mode symptom. The owner had already spent a few hundred dollars replacing shift solenoids based on a generic code reader’s output, but the problem persisted. After a quick scan with our professional equipment, we identified communication errors with the TCM. Instead of continuing to throw parts at it, we installed one of our VIN-programmed T42 modules. The car immediately started shifting perfectly through all gears, and all diagnostic codes were cleared. It’s a common scenario where the control unit itself is the root cause, not the mechanical components it manages.
Diagnosing a Faulty 2007-2010 G5 Transmission Module
A failing TCM can manifest in various ways, often mimicking other transmission problems. If you’re experiencing any of the following issues, your transmission control module is the likely culprit. This module is engineered to resolve these exact problems, providing a lasting and reliable fix.
- ✔️ Erratic and Harsh Shifting: Your car may slam into gear, hesitate between shifts, or shift at incorrect RPMs.
- ✔️ Stuck in Limp Mode: The transmission may refuse to shift out of a single gear (usually 2nd or 3rd) to prevent further damage.
- ✔️ Warning Lights: The Check Engine Light or a dedicated transmission warning light will illuminate on your dashboard.
- ✔️ Diagnostic Trouble Codes (DTCs): Common codes like P0700 (Transmission Control System Malfunction) or various solenoid-specific codes (P0750, P0751, etc.) will be present.
- ✔️ Delayed Engagement: A noticeable delay when shifting from Park into Drive or Reverse.
- ✔️ Poor Fuel Economy: Inefficient shifting patterns caused by the faulty module can lead to a significant drop in gas mileage.
- ✔️ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM at all.
The Advantage of VIN Programming
The key benefit of this module is our complimentary VIN programming service. Modern vehicles are complex, and the TCM must be perfectly matched to your car’s specific engine, tire size, and electronic systems. Our technicians use the latest GM software updates to flash this module with your car’s VIN before it ships. This process ensures:
- Perfect Compatibility: The module works seamlessly with your car’s Engine Control Unit (ECU) and other systems.
- Optimal Performance: Shift points and torque converter lockup are calibrated precisely for your vehicle’s specifications.
- No Extra Costs: You avoid the expensive programming fees charged by dealerships, which can often exceed the cost of the part itself.
Installation is straightforward for a DIY mechanic or any professional technician. On the 2007-2010 Pontiac G5, the TCM is typically located on the driver’s side strut tower in the engine bay. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Reconnect everything, and you’re ready to go. We recommend clearing any stored DTCs with a scan tool after installation for a clean slate.
Frequently Asked Questions
What is VIN programming and why is it essential?
VIN programming is the process of loading your vehicle’s specific factory software and calibrations onto the transmission control module. It’s essential because it ensures the TCM communicates correctly with your car’s engine and other electronic systems, guaranteeing correct shift points, torque converter operation, and overall performance. Without it, the transmission may not function properly or at all.
Will this module fit other GM vehicles besides the Pontiac G5?
Yes, this T42 TCM is compatible with a wide range of 2006-2014 General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E and 4L65E. This includes models like the Chevrolet Cobalt, HHR, Impala, GMC Sierra, and many others. Please verify the part number or use our vehicle fitment tool to ensure it’s the correct part for your specific car or truck.
Do I need to send my old module back (core charge)?
No, there is absolutely no core charge for this part. You can keep your old module or dispose of it at your convenience without any additional fees or hassle.
What if I install it and still have problems?
This module is backed by our one-year warranty. If you experience any issues, first ensure all connections are secure and that there are no other underlying problems with your transmission’s wiring or mechanical components. If the module is determined to be the issue, our customer support team is here to assist you with troubleshooting and warranty claims.
How long does installation take?
For someone with basic mechanical skills, the installation typically takes under 30 minutes. The module is easily accessible in the engine compartment of the Pontiac G5, requiring only basic hand tools to swap out.