Restore Peak Performance to Your Buick’s Transmission
Is your 2006-2009 Buick Allure suffering from delayed gear engagement, harsh shifting, or a frustrating “limp mode”? 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 shift with precision. When it fails, it can lead to poor performance, decreased fuel economy, and dashboard warning lights. This T42 Transmission Control Module, service part number 24255280, is the definitive solution to restore your vehicle’s factory performance and drivability.
Engineered to meet and exceed original equipment specifications, this module is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. The most critical feature is that it arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This eliminates the need for expensive dealership visits for programming, making the installation a true plug-and-play process for both professional technicians and savvy DIYers.
From the Diagnostic Bay
We recently had a 2008 Chevrolet Impala (which uses the same T42 module as the Allure) come into the shop. The customer complained of violent 1-2 shifts and the vehicle randomly getting stuck in 3rd gear. The scanner showed a P0700 (Transmission Control System Malfunction) and a solenoid performance code. After verifying the wiring and solenoid resistance, we suspected the TCM. Instead of a costly trip to the dealer, we ordered one of these VIN-programmed modules. The installation took less than 20 minutes under the air cleaner box. After reconnecting the battery and clearing the codes, the car shifted perfectly on the test drive. The customer was thrilled to have their car back on the road quickly and for a fraction of the dealership’s quoted price.
Diagnosing a Faulty Buick Allure TCM
A failing transmission computer can manifest in several ways, often mimicking mechanical transmission problems. Before condemning your transmission, it’s crucial to check for these common electronic symptoms. If your vehicle is exhibiting one or more of the following issues, a faulty TCM is the likely culprit.
- ✔ Erratic and Harsh Shifting: Experiencing sudden, jerky, or unpredictable gear changes.
- ✔ Delayed Engagement: A noticeable pause when shifting from Park into Drive or Reverse.
- ✔ Stuck in Gear / Limp Mode: The transmission defaults to a single gear (usually 2nd or 3rd) to prevent further damage.
- ✔ Warning Lights: Illumination of the Check Engine Light or a specific transmission warning light on your dash.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes include P0700, P0750, or other solenoid-specific faults.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lockup can lead to a significant drop in MPG.
- ✔ No Communication: A scan tool may be unable to communicate with the TCM, indicating a complete module failure.
Why Our Programmed T42 TCM is the Superior Choice
Choosing the right replacement part is critical for a lasting repair. Our modules offer reliability and convenience that sets them apart.
- ✔ VIN-Programmed for You: We program the module with the latest GM software updates using your car’s VIN. This ensures perfect compatibility and optimal transmission performance right out of the box.
- ✔ Plug-and-Play Installation: Because the programming is done for you, there’s no need for special tools or a trip to the dealership. Simply disconnect the old module and connect the new one.
- ✔ OEM-Quality Construction: Built to the same stringent standards as the original factory part, ensuring durability and long-term reliability under all driving conditions.
- ✔ Comprehensive Solution: Addresses common electronic issues, including solenoid control, torque converter lock-up, and pressure regulation, to restore smooth and efficient operation.
- ✔ One-Year Warranty: Drive with confidence knowing your purchase is protected by a comprehensive one-year warranty.
- ✔ Broad Interchange Compatibility: This module is a direct replacement for numerous part numbers, including 24252114, 24234503, 24230461, 24234274, and more, making it a versatile solution for many GM cars, trucks, and SUVs.
Frequently Asked Questions
Do I need to get this TCM programmed by a dealer?
No. This module is delivered to you pre-programmed to your vehicle’s VIN. This makes the installation process simple and eliminates the need for any additional programming or dealership visits.
Where is the TCM located on my 2006-2009 Buick Allure?
On the Buick Allure and similar models like the LaCrosse and Impala, the T42 TCM is typically found bolted to the lower air cleaner housing in the engine bay. It’s an easy-to-access location for a quick replacement.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the Check Engine Light be turned on. While this module can resolve the underlying issue causing the P0700, it’s essential to scan for other transmission-specific codes (like P07xx) to confirm the exact nature of the fault.
Is this a new or rebuilt part?
This is an OEM-quality replacement part built to factory specifications. It is inspected and programmed to ensure it functions as new, providing a reliable and cost-effective solution for your vehicle.
What is the installation process like?
Installation is straightforward. First, disconnect the negative battery terminal. Then, locate the old TCM, disconnect its electrical connectors, and unbolt it. Bolt the new module in its place, reconnect the connectors, and finally, reconnect the battery. The entire process typically takes less than 30 minutes.