Restore Flawless Shifting to Your Buick Allure
If you’re dealing with the frustration of a Buick Allure that shifts harshly, gets stuck in gear, or throws transmission-related codes, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Transmission Control Module (TCM) can disrupt your daily drive. This T42 series TCM, part number 24239224, is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a hassle-free, direct-fit replacement. It restores the precise, smooth shifting your car had when it left the factory.
A Technician’s Notebook
I remember a 2008 Buick Allure that came into the shop with classic symptoms: unpredictable, jarring shifts and a persistent check engine light. The owner was worried about a costly transmission rebuild. After a quick scan, we found a P0700 (Transmission Control System Malfunction) code. Instead of a complex internal repair, the culprit was the original TCM. We installed one of our VIN-programmed modules, and in less than an hour, the car was shifting perfectly. It’s a common story, and this part is often the simple, reliable fix that saves drivers from unnecessary stress and expense.
Is Your Buick Allure Showing These Warning Signs?
A faulty TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs attention. Ignoring these symptoms can lead to further transmission damage and reduced vehicle safety.
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ The vehicle is stuck in “limp mode” (often second or third gear).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758 (solenoid codes), or other communication errors.
- ✔ Failure to upshift or downshift properly.
- ✔ Decreased fuel economy and a feeling of sluggish performance.
- ✔ Complete loss of communication with the transmission.
The Advantage of a Pre-Programmed 2006-2009 Allure Transmission Module
The biggest hurdle with electronic module replacement is often the programming. Our service eliminates that step entirely. We flash the module with the latest GM software updates specific to your car’s VIN before it ships. This ensures perfect communication between the engine and transmission, optimizing shift points, torque converter lockup, and fuel efficiency right out of the box. No expensive trips to the dealership for programming are required.
DIY Installation Guide: A 30-Minute Fix
For the 2006-2009 Buick Allure, this is a very manageable job for a DIY enthusiast. You don’t need a vehicle lift or specialized transmission tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the TCM: On your Buick Allure, the TCM is conveniently located under the lower air cleaner housing in the engine bay. You will need to remove the air cleaner assembly to access 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. Securely reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reinstall the air cleaner assembly and reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. While not always necessary, using a basic OBD2 scan tool to clear any stored DTCs is a good final step.
Verified Vehicle Compatibility List
This T42 TCM is a direct replacement for a wide range of General Motors vehicles. While this page focuses on the Buick Allure, it is also compatible with the following models. Please verify the location noted for your specific vehicle.
- Buick Allure (2006-2009): Found under the lower air cleaner housing.
- Buick LaCrosse / Lucerne (2006-2011): Typically under the lower air cleaner housing or in the LH engine compartment.
- Chevrolet Silverado / GMC Sierra (2007-2013): Located next to the battery.
- Chevrolet Tahoe / GMC Yukon (2007-2009): Located next to the battery.
- Chevrolet Impala / Monte Carlo (2006-2011): Found under the lower air cleaner housing.
- Pontiac G6 / Grand Prix (2006-2010): Located on the LH strut tower or under the lower air cleaner housing.
- Saturn Aura / Vue (2007-2010): Typically on the LH frame rail or in the LH front engine compartment.
This module interchanges with numerous part numbers, including: 24252114, 24234503, 24230461, 24234274, 24239224, 24256960, and more.
Frequently Asked Questions
Does this module require any additional programming?
No. This module is sold as a plug-and-play solution. We program it to your vehicle’s specific VIN before shipping, so it’s ready for installation right out of the box without any need for a trip to the dealer.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old part back, saving you time and return shipping costs.
What tools are needed for installation on a Buick Allure?
Installation typically requires only basic hand tools, such as a socket set and screwdrivers to remove the air cleaner housing and unbolt the module. No specialized equipment is needed.
Will this fix a P0700 trouble code?
Yes, in many cases. The P0700 code is a general fault code indicating the TCM has detected a problem. If the TCM itself is the source of the failure, replacing it with this programmed unit will resolve the code and the underlying issue.