Finally, A Real Fix for Your G5’s Shifting Problems
If you’re dealing with a 2007-2010 Pontiac G5 that’s shifting harshly, getting stuck in gear, or throwing transmission codes, you know how frustrating it can be. As a mechanic with over two decades of diagnostic experience, I’ve seen countless drivers worried about a massive transmission repair bill. More often than not, the culprit is a failed Transmission Control Module (TCM). This VIN-programmed T42 TCM, part number 24256960, is the definitive solution to restore your vehicle’s performance and peace of mind without a costly trip to the dealership.
A Technician’s Notebook
I remember a 2008 G5 that came into the shop with a classic complaint: “It drives fine for 10 minutes, then it slams into gear and the check engine light comes on.” The owner had already replaced a shift solenoid with no luck. A quick scan showed a P0700 (Transmission Control System Malfunction) and an intermittent solenoid circuit code. Instead of chasing electrical ghosts, we went straight for the known weak point. After installing one of our pre-programmed T42 modules, the car drove perfectly. The issue wasn’t the transmission’s mechanical parts; it was the brain telling them what to do. This module saved the customer from a potential transmission rebuild.
Is Your Pontiac G5 Showing These Telltale Signs?
A failing TCM doesn’t always mean a complete breakdown. It often starts with subtle issues that get progressively worse. If you’re experiencing any of the following, your TCM is likely the cause:
- âś” Unpredictable or harsh gear shifts that slam or jerk the vehicle.
- âś” The car feels stuck in one gear (often 2nd or 3rd), a condition known as “limp mode.”
- âś” Your check engine light is on, with Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, or other transmission-related codes.
- âś” Delayed engagement when shifting from Park to Drive or Reverse.
- âś” A sudden drop in fuel economy or a transmission overheating warning.
- âś” Complete loss of communication with the module, preventing the vehicle from starting or shifting out of Park.
Why This 2007-2010 G5 Transmission Module is the Smart Choice
This isn’t just a replacement part; it’s a complete repair solution. We’ve engineered the process to be as simple and effective as possible for both professional technicians and first-time DIYers. The key is our complimentary VIN programming service. We flash the module with your car’s specific Vehicle Identification Number and the latest GM software before it even ships. This ensures the TCM works seamlessly with your car’s engine computer and other systems right out of the box, eliminating the need for expensive dealer-only programming tools.
Your Step-by-Step Guide to a Quick TCM Swap
For the Pontiac G5, this is one of the more straightforward module replacements. You don’t need a vehicle lift or complex tools—just some basic hand tools and about 30 minutes.
- Safety First: Always disconnect the negative terminal from your car’s battery to prevent electrical shorts and reset the onboard systems.
- Locate the TCM: On your 2007-2010 G5, the transmission module is conveniently located on the driver’s side of the engine bay, mounted to the strut tower.
- Disconnect and Remove: Carefully unclip the electrical connectors. Press the release tabs firmly and pull straight out. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the electrical harnesses, ensuring they click securely into position.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic OBD2 scanner, it’s good practice to clear any stored fault codes. Take the car for a test drive to confirm the shifting is smooth.
Verified Fitment Across the GM Family
While this is the perfect part for your Pontiac G5, this T42 TCM is also a direct replacement for a wide range of other GM vehicles. It is interchangeable with part numbers 24252114, 24234503, 24230461, 24234274, and more. It fits models including:
- Pontiac: G5 (07-10), G6 (06-10), Grand Prix (06-08), Pursuit (06)
- Chevrolet: Cobalt (06-10), HHR (06-11), Impala (06-11), Malibu (06-10), Monte Carlo (06-07)
- Saturn: Aura (07-09), Ion (06-07), Vue (07-10)
- Buick: Allure (06-09), LaCrosse (06-09), Lucerne (06-11)
- And many other GM trucks, vans, and SUVs. Please verify your specific model in the fitment chart.
Frequently Asked Questions
Do I need to take this module to a dealer for programming?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for plug-and-play installation, saving you hundreds of dollars and a trip to the dealership.
Where is the TCM located on my 2009 Pontiac G5?
On the 2007-2010 Pontiac G5, the Transmission Control Module is located in the engine compartment, mounted directly to the driver’s side (LH) strut tower, making it very easy to access.
Is this part number 24256960 the same as other T42 modules?
Yes, 24256960 is one of several interchangeable service numbers for the GM T42 TCM. It’s compatible with numbers like 24252114, 24234503, and others listed in our description, ensuring a correct fit.
What is a core charge? Do I need to send my old part back?
There is absolutely no core charge on this module. You can keep your old part or dispose of it at your convenience without any extra fees or hassle.
What kind of warranty comes with this TCM?
This module is backed by our one-year, hassle-free warranty. We stand by the quality and reliability of our programmed electronics to give you confidence in your repair.