Is Your Grand Prix Shifting Erratically or Stuck in Gear?
If you’re dealing with a Pontiac Grand Prix that slams into gear, refuses to shift, or has the check engine light glaring at you, a faulty Transmission Control Module (TCM) is the most likely culprit. Over my 20+ years in the shop, I’ve seen these exact issues countless times. The TCM is the brain of your automatic transmission, and when it fails, it creates frustrating and potentially damaging driving conditions. This isn’t just an annoyance; it’s a critical failure that affects your car’s performance, safety, and fuel economy.
“A customer’s 2007 Grand Prix GXP came in last week with a persistent P0752 code (Shift Solenoid A Stuck On) and a very harsh 1-2 shift. He had already replaced the solenoid, but the problem remained. After a quick diagnostic check of the wiring harness, we identified the root cause: the original TCM was sending erratic voltage signals. We installed one of our VIN-programmed modules, and the car was shifting perfectly within 30 minutes. It’s a textbook example of how a failing module can mimic a mechanical fault.”
The Permanent Fix for Common Transmission Problems
This T42 Transmission Control Module is the definitive solution for your 2006-2008 Pontiac Grand Prix. It arrives at your door fully programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits or specialized scan tools. This isn’t just a replacement part; it’s a complete, ready-to-install fix that restores your transmission’s factory performance and reliability.
- ✔ Erratic or Harsh Shifting: Eliminates banging, jerking, or delayed gear engagement.
- ✔ Stuck in Limp Mode: Gets your car out of a single gear (usually 2nd or 3rd) and restores full function.
- ✔ Check Engine & Transmission Lights: Clears persistent diagnostic trouble codes (DTCs) like P0700, P0750, and other solenoid-related faults.
- ✔ No Upshift or Downshift: Restores proper communication between the engine and transmission for smooth gear changes.
- ✔ Poor Fuel Economy: By ensuring correct gear selection and torque converter lockup, this module helps restore your MPG.
Simple Installation for Your 2006-2008 Grand Prix TCM
You don’t need to be a master mechanic to install this part. The process is straightforward and can be completed in your driveway with basic hand tools. For the 2006-2008 Grand Prix, the TCM is conveniently located under the lower air cleaner housing.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts and to help reset the vehicle’s computer system.
- Locate the Module: Remove the air cleaner box assembly to gain access to the TCM mounted below it.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the electrical connectors, ensuring they click securely into place.
- Reassemble and Finalize: Reinstall the air cleaner housing and reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. If you have a basic scan tool, it’s a good practice to clear any stored codes.
Why Choose Our VIN-Programmed Module?
Every module is loaded with the latest GM-certified software matched directly to your car’s VIN. This ensures perfect communication with the Engine Control Module (ECM) and other vehicle systems, providing a level of precision that generic, non-programmed parts can’t match. Built to strict OEM standards and backed by a one-year warranty, this module is the most reliable and cost-effective way to get your Grand Prix back to peak condition. This part is a direct replacement for several part numbers, including 24230461, 24252114, 24234503, 24240449, and more. Order today and solve your transmission problems for good.