Restore Peak Transmission Performance in Your Buick Allure
Is your 2006-2009 Buick Allure suffering from erratic shifting, delayed gear engagement, or a persistent 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 smooth gear changes, managing torque converter lockup, and ensuring overall powertrain efficiency. When it fails, it can leave your vehicle stuck in ‘limp mode’ or make driving unpredictable and unsafe. This OEM-quality T42 TCM, part number 24239224, is the definitive solution to restore your vehicle’s drivability and peace of mind.
From the Diagnostic Bay
We had a 2008 Chevy Impala come in with classic symptoms: harsh 1-2 shifts and a P0700 code. The owner had already spent a few hundred dollars replacing shift solenoids at another shop, but the problem persisted. After a quick scan and data stream analysis, we identified the root cause: an internally failing TCM was sending erratic signals to perfectly good solenoids. We installed one of our VIN-programmed T42 modules, cleared the codes, and the car shifted like it just rolled off the assembly line. This highlights how correctly diagnosing the TCM first can save you time, money, and unnecessary repairs.
Is Your Transmission Acting Up? Common Failure Symptoms
A faulty TCM can manifest in various ways, often being misdiagnosed as an internal transmission failure. Before considering a costly transmission replacement, check if your vehicle is exhibiting any of these common symptoms:
- ✔ Harsh, slamming, or unpredictable gear shifts.
- ✔ The vehicle gets stuck in a single gear (often 2nd or 3rd), known as ‘limp mode’.
- ✔ Illumination of the Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ Failure to upshift or downshift, leading to poor acceleration and fuel economy.
- ✔ A noticeable delay when shifting from Park into Drive or Reverse.
- ✔ Intermittent loss of communication with the TCM, causing gauges or other electronics to act erratically.
Why Our Programmed Buick Allure TCM is the Right Choice
Choosing the right replacement part is crucial for a lasting repair. Our T42 modules are meticulously prepared to provide a seamless and effective solution. The key is our VIN programming service. When you order, we flash the module with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software calibrations. This process ensures that the module communicates perfectly with your vehicle’s engine computer (ECU) and other systems right out of the box. You get optimal shift points, correct torque converter strategy, and resolution for common software-related DTCs without ever needing a trip to the dealership for expensive programming.
Simple, Direct-Fit Installation
This module is designed for a straightforward installation. On the 2006-2009 Buick Allure, the TCM is typically located inside or on the lower air cleaner housing, making it accessible in the engine bay. The process generally takes less than 30 minutes for a seasoned DIYer or professional technician.
- Safety First: Always disconnect the negative battery terminal before starting any electrical work.
- Locate the Module: Find the old TCM on your vehicle.
- Swap the Part: Carefully disconnect the electrical connectors and unbolt the old module. Install the new module in its place and securely reconnect the harnesses.
- Final Steps: Reconnect the battery. While our programming handles the critical setup, it’s always best practice to use a standard OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
This module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24230461, and 24239224, ensuring broad compatibility and a perfect fit.
Frequently Asked Questions
What does a Transmission Control Module (TCM) do?
The TCM is a computer that processes data from various sensors on the engine and transmission to control shift timing, line pressure, and torque converter lockup. A properly functioning module is essential for smooth performance, fuel efficiency, and transmission longevity.
Is this Buick Allure TCM truly plug-and-play?
Yes. By providing your vehicle’s VIN during checkout, we program the module specifically for your car. This eliminates the need for any additional programming or setup procedures from a dealership, making the installation process simple and direct.
Where is the TCM located on my 2007 Buick Allure?
For the 2006-2009 Buick Allure, the TCM is typically found attached to the lower air cleaner housing in the engine compartment. Location can vary slightly on other compatible GM models, so always verify the location on your specific vehicle.
Will this fix transmission codes like P0700?
A P0700 code is a general fault request from the TCM to the main engine computer to turn on the check engine light. This part will resolve the underlying issue that caused the P0700, such as solenoid circuit faults or internal module errors, as long as the TCM itself is the source of the problem.
Do I need to return my old TCM (core charge)?
No, there is no core charge for this part. You can keep your old module, saving you the time and expense of shipping it back.