Restore Flawless Shifting to Your Pontiac Grand Prix
Is your 2006, 2007, or 2008 Pontiac Grand Prix suffering from erratic shifting, getting stuck in gear, or displaying a check engine light? These are classic symptoms of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating gear changes, managing torque converter lockup, and monitoring system health. When it fails, your driving experience can become unpredictable and frustrating. This OEM-quality T42 TCM, part number 24235732, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play installation.
From the Diagnostic Bay
We had a 2007 Grand Prix come into the shop with the classic ‘stuck in 3rd gear’ limp mode. The owner had already spent a small fortune at another shop that replaced two shift solenoids inside the transmission, but the problem persisted. A quick scan showed a P0700 code, which is a general transmission fault request. Digging deeper, we found intermittent communication loss with the TCM. Instead of tearing into the transmission again, we identified the root cause: the original TCM was failing electronically. We installed one of our VIN-programmed T42 modules, cleared the codes, and the car shifted perfectly on the test drive. It’s a powerful reminder that the problem isn’t always mechanical; sometimes, the computer is the culprit.
Is Your Grand Prix Showing Signs of a Failing TCM?
A faulty transmission module can manifest in several ways. If you’re experiencing any of the following issues, your TCM is the most likely cause:
- ✔ Harsh or Erratic Shifting: Experiencing sudden, jerky gear changes or unpredictable shifting patterns during acceleration or deceleration.
- ✔ Delayed Engagement: A noticeable pause when shifting from Park into Drive or Reverse.
- ✔ Stuck in Limp Mode: The vehicle refuses to shift out of a single gear (often 2nd or 3rd) to protect the transmission from further damage.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Your mechanic finds codes like P0700 (Transmission Control System Malfunction), P0750 series (Shift Solenoid), or other transmission-related faults.
- ✔ Poor Fuel Economy: Inefficient shifting leads to the engine working harder than necessary, causing a sudden drop in MPG.
The Definitive Solution: A VIN-Programmed 2006-2008 Grand Prix TCM
Don’t settle for a generic, unprogrammed module that requires an expensive trip to the dealership for coding. Our T42 TCM is the smart, efficient solution for your Pontiac. We handle the complex programming for you, ensuring that the module you receive is perfectly matched to your vehicle’s factory specifications. This process uses the latest GM software updates to not only restore original functionality but also to correct known factory bugs, leading to enhanced reliability and smoother operation. By controlling all critical transmission functions with precision, this module helps restore fuel efficiency and prevents the excessive wear and tear associated with a failing unit.
Simple, Straightforward Installation
For the 2006-2008 Pontiac Grand Prix, the TCM is conveniently located under the lower air cleaner housing in the engine compartment. The replacement process is simple enough for a seasoned DIYer and can be completed in under an hour with basic tools.
Installation Steps:
- Disconnect the negative battery terminal to prevent electrical shorts and help reset the vehicle’s computer systems.
- Locate and remove the air cleaner assembly to access the TCM.
- Carefully disconnect the electrical connectors from the old module.
- Unbolt and remove the faulty TCM from its mounting bracket.
- Install the new, pre-programmed TCM, secure the bolts, and reconnect the electrical harnesses.
- Reinstall the air cleaner assembly and reconnect the battery.
- Start the vehicle and use a standard OBD2 scan tool to clear any stored diagnostic trouble codes.
This module is a direct replacement for a wide range of service numbers, including 24252114, 24234503, 24230461, 24235732, and many more, ensuring broad compatibility across the GM family of vehicles.
Frequently Asked Questions
What does ‘VIN-Programmed’ mean for my Grand Prix?
VIN programming means we load your car’s unique 17-digit Vehicle Identification Number into the module before shipping. This ensures the TCM has the correct software and calibration files specifically for your Grand Prix’s engine, transmission, and options, making it a true plug-and-play part without needing dealer intervention.
Will this module fix my P0700 trouble code?
Yes. A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the check engine light. Replacing a faulty TCM with this correctly programmed unit is the direct fix for this issue, as well as the more specific codes that the TCM has stored.
Where is the TCM located on a 2006-2008 Grand Prix?
On the 2006-2008 Pontiac Grand Prix, the transmission control module is located in the engine compartment, situated beneath the lower air cleaner housing. You will need to remove the air box to gain access to it.
Is this a difficult part to install myself?
For someone with basic mechanical skills, the installation is very straightforward and typically takes less than an hour. It involves removing the air cleaner box, disconnecting electrical connectors, and swapping the module. No special tools are required beyond a basic socket set.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep your old module, recycle it, or dispose of it as you see fit without the hassle of shipping it back to us.