Restore Peak Performance to Your Pontiac Grand Prix
If your 2006, 2007, or 2008 Pontiac Grand Prix is suffering from harsh shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. This critical component acts as the brain for your automatic transmission, and when it fails, it can make your vehicle unreliable and frustrating to drive. This replacement GM T42 TCM, part number 24252114, is the definitive solution to restore the smooth, predictable performance you expect from your car.
From the Diagnostic Bay
We recently had a 2007 Grand Prix GXP in the shop with a classic complaint: intermittent, bone-jarring shifts from 1st to 2nd gear and a P0752 code (Shift Solenoid A Stuck On). The owner had already replaced the solenoid twice with no luck. After a quick scan and data stream analysis, we saw the command signal from the TCM was erratic. The problem wasn’t the solenoid; it was the driver circuit inside the original module failing under load. Installing a properly programmed TCM like this one solved the issue instantly, saving the customer from further guesswork and unnecessary repairs.
Is Your Grand Prix Showing These Signs of TCM Failure?
A faulty TCM can manifest in various ways. A proper diagnosis is key, but if you’re experiencing any of the following, your module is the prime suspect:
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle enters “limp mode,” often getting stuck in 2nd or 3rd gear to protect the transmission.
- ✔ Check Engine Light or Transmission Warning Light is on, with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ Complete failure to upshift or downshift, leading to poor acceleration and high RPMs.
- ✔ A noticeable decrease in fuel economy as the transmission operates inefficiently.
- ✔ Intermittent electrical problems that seem to have no other source.
The Benefits of a VIN-Programmed Grand Prix Transmission Module
What sets this module apart is our expert VIN programming service. Before we ship the part, we flash it with the latest GM-certified software specific to your Grand Prix’s Vehicle Identification Number. This critical step ensures that the module communicates flawlessly with your vehicle’s engine computer and other systems right out of the box. You get optimal shift points, correct torque converter lockup strategy, and resolved communication DTCs without a trip to the dealership for expensive programming.
This module is engineered to meet or exceed original equipment standards, providing a dependable, long-term solution for your transmission woes. It is a direct replacement for a wide range of GM part numbers, including 24234503, 24230461, and 24256960, making it the ideal choice for your repair.
Installation and Fitment
For the 2006-2008 Pontiac Grand Prix, the TCM is conveniently located in the engine bay, situated in the lower air cleaner housing. Installation is straightforward for a DIY mechanic with basic tools and typically takes less than an hour. Simply disconnect the battery, remove the air cleaner assembly for access, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Once reconnected, clear any remaining DTCs with a standard scan tool to complete the job. There’s no core charge, so you don’t have to worry about the hassle and expense of returning your old part.
Frequently Asked Questions
What does VIN programming mean for my Grand Prix?
VIN programming means we load the module with the specific software calibration for your car’s exact build, including engine, transmission, and tire size. This ensures perfect compatibility and performance without needing any additional programming from a dealer.
Is this a difficult part to install myself?
For the Grand Prix, the installation is relatively simple. It is located in the lower air cleaner housing. With basic hand tools, most DIY mechanics can complete the swap in under an hour. Always disconnect the battery before starting.
Will this TCM fix a P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the ECU to turn on the check engine light. While this module often resolves the underlying issue causing the P0700 (like a solenoid circuit fault), you should always diagnose the specific codes stored within the TCM itself for a complete picture.
Do I need to return my old module?
No, there is no core charge for this part. You can keep your old module, which simplifies the process and saves you money on return shipping.
How do I know this is the right part for my car?
This module is the correct fit for 2006-2008 Pontiac Grand Prix models. It is also a direct replacement for multiple service numbers, including 24252114, 24234503, and 24242391. Providing your VIN at checkout guarantees we program it correctly for your vehicle.