Is Your Grand Prix Shifting Erratically?
Experiencing harsh shifts, a check engine light, or the unnerving feeling of your car being stuck in one gear can ruin your driving experience. These are classic signs of a failing Transmission Control Module (TCM). Your 2006-2008 Pontiac Grand Prix relies on this critical component for smooth, efficient gear changes. When it fails, performance suffers and bigger problems can be just around the corner. This VIN-programmed T42 TCM is the definitive solution to restore your vehicle’s crisp, reliable shifting and get you back on the road with confidence.
Common Symptoms & Your Solution
A faulty TCM can cause a cascade of issues that are often misdiagnosed. If you’re noticing any of the following, it’s time to consider a replacement:
- Abrupt, harsh, or delayed gear shifts
- Vehicle entering “limp mode,” often stuck in 2nd or 3rd gear
- Active Check Engine or Transmission warning lights
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes
- Failure to upshift or downshift properly
- Noticeable decrease in fuel economy
This module is the direct-fit, pre-programmed solution for your 2006-2008 Pontiac Grand Prix Transmission Control Module, engineered to resolve these issues and restore factory performance without a trip to the dealer.
Features & Benefits
- ✔ Plug & Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. This crucial step ensures perfect communication between the TCM and your car’s other systems, eliminating the need for expensive dealership programming. Just install it and go.
- ✔ Restored Performance: By precisely managing shift points, torque converter lockup, and line pressure, this TCM brings back the smooth, responsive feel your Grand Prix had from the factory.
- ✔ Lasting Reliability: Built to meet or exceed strict OEM specifications, this component is designed for durability, ensuring a long-lasting fix for common transmission problems.
- ✔ Broad Compatibility: This T42 TCM is a direct replacement for a wide range of original part numbers, including 24252114, 24234503, 24242391, and more, guaranteeing a perfect fit.
- ✔ One-Year Protection: This unit is backed by our one-year replacement warranty, giving you confidence in your repair.
Expert Insight: The Power of VIN Programming
Why is VIN programming so important? Unlike a generic, off-the-shelf module, a VIN-programmed unit contains the exact software and calibrations your Grand Prix needs. GM vehicles of this era have complex electronic systems that must communicate flawlessly. Our programming process installs the latest GM updates specific to your car, ensuring the TCM works perfectly with your engine, ABS, and other computers. This prevents compatibility issues that can cause persistent error codes and poor performance, making it a smarter and more reliable repair than a non-programmed alternative.
By installing our fully tested and programmed 2006-2008 Pontiac Grand Prix Transmission Control Module, you’re not just replacing a part—you’re restoring the integrity of your vehicle’s powertrain. It’s the most effective way to solve frustrating shifting issues and ensure your car performs as it should for years to come.
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. The main benefit of our TCM is that it comes pre-programmed to your vehicle’s VIN. This makes it a true plug-and-play solution, saving you the time, cost, and hassle of a dealership visit for programming.
Is this part difficult to install?
For the Pontiac Grand Prix, the TCM is located in the lower air cleaner housing, making it accessible for a DIY mechanic with basic tools. Installation typically takes under an hour. We always recommend disconnecting the battery before starting the replacement.
How do I know for sure that my TCM is the problem?
Common signs include erratic shifting, getting stuck in gear (limp mode), and specific transmission-related trouble codes like P0700. While these symptoms strongly point to a failing TCM, we recommend having a professional mechanic diagnose the issue to confirm before ordering your 2006-2008 Pontiac Grand Prix Transmission Control Module.
Will this fix my check engine light?
If the check engine light is on due to a fault within the original TCM (such as solenoid performance codes), this replacement part will resolve the issue. After installation, you should clear any stored codes with a standard OBD-II scan tool.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep or dispose of your old module without any extra hassle or fees.