Restore Flawless Shifting to Your Pontiac G5
Is your 2007-2010 Pontiac G5 suffering from harsh shifting, getting stuck in gear, or throwing transmission codes? A faulty Transmission Control Module (TCM) is one of the most common culprits behind these frustrating and potentially damaging issues. Think of the TCM as the transmission’s brain; when it fails, it sends incorrect signals, leading to poor performance, reduced fuel economy, and the dreaded check engine light. This T42 TCM, part number 24240400, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
A Technician’s Notebook: The Intermittent Shifting Mystery
I had a 2008 Pontiac G5 in the shop that was a real head-scratcher. The owner complained of random, violent shifts and occasional limp mode, but the problem would disappear for days at a time. We checked the fluid, solenoids, and wiring harnesses—all looked fine. The issue pointed to the TCM, but intermittent failures can be tricky. Instead of sending the customer to the dealer for an expensive diagnostic and programming session, we installed one of our VIN-programmed T42 modules. The fix was immediate and permanent. This is why a pre-programmed unit is so valuable; it eliminates programming as a variable and provides a confident, one-time repair.
Is Your Pontiac G5 Showing These Red Flags?
A failing TCM doesn’t get better on its own. In my 20+ years of experience, I’ve seen these modules cause everything from minor annoyance to complete transmission failure. If you’re experiencing any of the following, it’s time to act:
- âś” Harsh, banging shifts or delayed gear engagement.
- âś” The vehicle is stuck in a single gear (limp mode), often 2nd or 3rd.
- âś” Check Engine Light is on with Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, or other solenoid-related faults.
- âś” Unexplained drops in fuel efficiency.
- âś” The transmission feels like it’s slipping between gears.
- âś” Complete loss of communication with the transmission.
Your 30-Minute Path to Smooth Shifting
One of the best features of this module is its straightforward installation. You don’t need a lift or specialized diagnostic equipment to get your car back to factory performance. For a Pontiac G5, the process is simple.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the TCM: On your 2007-2010 G5, the TCM is conveniently located on the driver’s side, mounted to the LH strut tower in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly to avoid damaging them. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock in.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. It’s a good practice to use a basic scan tool to clear any stored fault codes, though the pre-programming often resolves the root cause.
Verified Fitment Across the GM Family
While this is the perfect solution for your 2007-2010 G5 Transmission Module, this versatile T42 unit is also compatible with a wide range of other General Motors vehicles. It directly interchanges with part numbers 24252114, 24234503, 24230461, 24234274, 24240400, and more. Please verify your specific model in the list below:
- 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), Silverado, Tahoe, Suburban, Avalanche, Express Van, Colorado
- GMC: Sierra, Yukon, Savana Van, Canyon, Envoy
- Buick: LaCrosse (06-09), Lucerne (06-11), Allure (06-09), Rendezvous (06-07), Rainier (06-07)
- Saturn: Aura (07-09), Ion (06-07), Vue (07-10)
- Cadillac: DTS (06-11)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your car’s engine computer and other systems right out of the box, eliminating the need for a trip to the dealership for expensive programming.
Do I need to return my old TCM? Is there a core charge?
No. We do not require a core return and there is no core charge. You can keep your old part, making the replacement process faster and more convenient for you.
Will this fix a P0700 code on my Pontiac G5?
A P0700 code is a general fault request from the TCM to the main engine computer, telling it to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, you should always scan for other, more specific ‘P’ codes (like P0753) to confirm the TCM is the root cause.
Is any other ‘relearn’ procedure required after installation?
Typically, no special relearn procedure is needed. The VIN programming handles the critical setup. After installation, the module will adapt to your driving style over the first 20-50 miles. Just drive normally, and the shifting will continue to smooth out as the adaptive learning completes.
What is the warranty on this part?
This transmission control module comes with a one-year, unlimited mileage warranty, giving you peace of mind and confidence in your repair.