Restore Peak Transmission Performance
Is your 2006-2009 Buick Allure, or another compatible GM vehicle, suffering from erratic shifting, getting stuck in gear, or displaying transmission-related warning lights? A failing Transmission Control Module (TCM) is the most common cause of these frustrating issues. This T42 TCM, service part number 24234274, is the definitive solution, engineered to restore your vehicle’s precise shifting and operational reliability. It arrives expertly programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation.
From the Diagnostic Bay
We recently had a 2008 Chevy Tahoe come into the shop stuck in third gear—a classic case of ‘limp mode.’ The owner had already spent a significant amount of money replacing shift solenoids based on a generic code, but the problem persisted. A quick scan showed a P0700 code, indicating a general transmission fault. Experience told us to look at the controller. We found intermittent communication from the original TCM. After installing one of our VIN-programmed T42 modules and clearing the codes, the Tahoe was shifting perfectly on the first test drive. It’s a common scenario where addressing the transmission’s ‘brain’ is the correct and final fix.
Common Symptoms of a Failing TCM
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle stuck in a single gear (limp mode).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults.
- ✔ Failure to upshift or downshift properly.
- ✔ Decreased fuel economy and potential transmission overheating.
- ✔ Complete loss of communication with the transmission.
The Reliable Solution: A Programmed 2006-2009 Allure TCM
This module is the central command for your automatic transmission, controlling everything from shift points and line pressure to torque converter lockup. Our replacement 2006-2009 Allure TCM is built to meet or exceed original equipment standards for durability and performance. The most critical feature is our VIN programming service. We load the latest GM-certified software specific to your vehicle before shipping, which means the module is ready for installation right out of the box. This process ensures optimal communication between the engine and transmission, restoring smooth performance and resolving persistent electronic faults.
Effortless Installation
Installation is straightforward for a DIY mechanic or any professional technician. On the Buick Allure, this module is typically located under the lower air cleaner housing. For other GM models, it can be found in the engine compartment near the battery or on a strut tower. Simply disconnect the battery, unbolt the old module, disconnect the wiring harnesses, and install the new one. Once the battery is reconnected, the vehicle will recognize the new, correctly programmed module. We recommend clearing any old codes with a scan tool after installation. Best of all, there is no core charge, so you don’t have to worry about the hassle and expense of returning your old part.
Don’t let a faulty TCM compromise your vehicle’s drivability. This pre-programmed 2006-2009 Allure TCM is the most reliable and cost-effective way to get your car back on the road and shifting like new. Order yours today and experience the difference.
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming involves loading your vehicle’s unique Vehicle Identification Number and the corresponding factory software onto the TCM. This is crucial because it ensures the module communicates perfectly with your specific engine, transmission, and other electronic systems, guaranteeing correct shift patterns and performance without any additional setup.
Do I need to send my old TCM back?
No. We do not require you to return your old part. There is no core charge associated with this purchase, which saves you time and return shipping costs.
Is this part difficult to install myself?
For most individuals with basic mechanical skills, the installation is simple and typically takes under 30 minutes. It involves disconnecting the battery, locating the old module in the engine bay, and swapping it with the new one. No special tools are required beyond basic hand tools.
How do I know if this TCM will fit my vehicle?
This T42 TCM fits a wide range of 2006-2014 GM vehicles, including the Buick Allure, Chevy Silverado, GMC Sierra, Pontiac G6, and many more. Please review the detailed fitment list on this page or contact us with your VIN, and we will confirm compatibility for you.
What does the one-year warranty cover?
Our one-year warranty covers any defects in the module’s material or workmanship. If the part fails within one year of purchase, we will provide a replacement, giving you peace of mind with your purchase.