Restore Flawless Shifting to Your Buick Allure
Is your 2006-2009 Buick Allure suffering from harsh shifting, getting stuck in gear, or displaying a check engine light? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change and ensuring smooth, efficient operation. When it fails, it can lead to poor performance, decreased fuel economy, and potentially catastrophic transmission damage. This OEM-quality T42 TCM, part number 24235340, is the definitive solution to get your vehicle back on the road with confidence.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. Each module is expertly programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This critical step ensures seamless communication with your car’s other computers, eliminating the need for an expensive trip to the dealership for programming. Simply install the module, and your Allure will perform as it should, with the latest GM software updates already loaded for optimal drivability.
From the Diagnostic Bay
We had a 2008 GMC Sierra in the shop that was stuck in third gear—a classic limp mode symptom. The owner had already replaced two shift solenoids based on a generic code reader’s output, with no change. When we hooked up our professional scanner, we saw communication errors with the TCM. The internal circuitry of the original module had failed, causing it to send faulty signals. Instead of throwing more parts at it, we installed a VIN-programmed T42 TCM. The truck immediately started shifting perfectly through all gears, and all transmission codes were cleared. It’s a reminder that symptoms like solenoid codes often point back to the module that controls them.
Symptoms of a Failing Buick Allure TCM
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle enters “limp mode,” often stuck in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- ✔ Inability to upshift or downshift properly.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ The transmission may feel like it’s slipping between gears.
- ✔ Complete loss of transmission function in severe cases.
The Importance of a Programmed 2006-2009 Allure TCM
Replacing a modern electronic component like the TCM isn’t as simple as swapping a mechanical part. The 2006-2009 Allure TCM must be perfectly matched to your vehicle’s specific configuration, including engine size, tire ratio, and other factory options. Our VIN programming service handles this for you. By providing your VIN at checkout, you receive a module that is a true plug-and-play component. It communicates flawlessly with the Engine Control Module (ECM) and other vehicle systems, restoring the precise shift points and torque converter lockup strategy designed by the manufacturer. This not only fixes the immediate problem but also protects your transmission from the long-term wear and tear caused by improper shifting.
Simple Installation, Lasting Results
Designed for a straightforward installation, this TCM can be replaced with basic hand tools in under an hour for most models. On the Buick Allure, it’s typically located under the lower air cleaner housing. Before you begin, always disconnect the vehicle’s battery. Once the new module is installed and the battery is reconnected, the vehicle’s computer systems will reset. We recommend using a basic OBD2 scan tool to clear any stored fault codes after installation to ensure a clean slate. With no core charge, you don’t have to worry about the hassle and expense of sending your old part back.
This module is a direct replacement for a wide range of GM vehicles and interchanges with numerous part numbers, including 24252114, 24234503, 24230461, and 24235340. Restore the performance and reliability of your vehicle today.
Frequently Asked Questions
What is VIN programming and why is it required?
VIN programming is the process of loading your vehicle’s specific software and calibration files onto the TCM. Every vehicle has unique settings based on its engine, transmission, and options. This programming ensures the new module works perfectly with your car’s other computers for correct shifting, fuel economy, and performance, eliminating the need for a dealership visit.
Is this a difficult part to install myself?
For most DIY mechanics, the installation is straightforward. It typically involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. The location on a 2006-2009 Allure is under the lower air cleaner housing. The entire process usually takes less than an hour with basic tools.
Will this TCM fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause of a P0700 and its related specific codes (like solenoid faults), you should ensure other transmission components are in good working order. However, a faulty TCM is one of the most common causes for this code.
What vehicles is this T42 TCM compatible with?
This T42 TCM fits a vast range of 2006-2014 GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. This includes many Chevrolet, GMC, Buick, Cadillac, Pontiac, and Saturn models. Please use our vehicle fitment tool to confirm compatibility for your specific car or truck.
Is there a core charge for this part?
No, we do not require a core charge. You can keep or dispose of your old module without the hassle of returning it, saving you time and money on core fees and return shipping.