Is Your Buick Allure Shifting Erratically?
If you’re experiencing delayed shifts, sudden jerks between gears, or your 2006-2009 Buick Allure is stuck in limp mode, the transmission control module (TCM) is the most likely culprit. As the electronic brain of your automatic transmission, a failing TCM can turn a smooth ride into a frustrating and unpredictable ordeal. Over my 20 years in diagnostics, I’ve seen hundreds of GM vehicles, including the Allure, come in with these exact issues, often accompanied by a check engine light and transmission-related fault codes like P0700 or P0750.
Expert Pro Tip: Check the Connectors First. Before you replace the TCM on your Allure, take a moment to inspect the main wiring harness connectors that plug into the module. It’s located under the air cleaner housing. I’ve seen cases where moisture intrusion leads to green corrosion on the pins, causing intermittent communication errors that mimic a failed module. A quick clean with an electronics-safe contact cleaner can sometimes solve the problem. If the pins are clean and the problems persist, the TCM itself has failed internally.
The Permanent Fix for Common Transmission Problems
Don’t let a faulty module sideline your car. This OEM-quality T42 Transmission Control Module is the definitive solution, engineered to restore your vehicle’s performance and reliability. It directly addresses the root cause of many frustrating transmission behaviors.
- โ Erratic & Harsh Shifting: Eliminates banging into gear, hesitation, and unpredictable shift patterns.
- โ Check Engine & Transmission Lights: Clears persistent diagnostic trouble codes (DTCs) related to the transmission and its solenoids.
- โ Limp Mode: Gets your vehicle out of being stuck in a single gear (usually 2nd or 3rd) and restores full functionality.
- โ No Shifting or Slipping: Corrects issues where the transmission fails to upshift or downshift properly or feels like it’s slipping between gears.
- โ Poor Fuel Economy: By restoring precise shift points and torque converter lockup, this module helps bring your MPG back to factory levels.
Your Direct-Fit 2006-2009 Allure Transmission Module Solution
The biggest hurdle in replacing a modern electronic module is programming. Weโve eliminated that step for you. Every module we ship is pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This isn’t a generic flash; it’s loaded with the latest GM software updates for your exact car. This means no expensive trips to the dealership, no special tools required, and no compatibility headaches. It’s a true plug-and-play repair.
Plug-and-Play Installation: No Dealer Visit Required
You can have your Allure running smoothly again in under 30 minutes. The process is straightforward for any DIYer with basic tools.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: On your 2006-2009 Buick Allure, the TCM is conveniently located under the lower air cleaner housing in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt it from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed module into place and securely reconnect the wiring harnesses. You should hear a click as they lock in.
- Reconnect and Verify: Reconnect the battery terminal. Start the vehicle and check to ensure the check engine light is off and the transmission shifts smoothly. We recommend using a basic scan tool to clear any stored historical codes after installation.
This module, also identified by part numbers 24234503, 24252114, 24242391, and others, is backed by our one-year warranty. You can drive with confidence knowing you’ve installed a quality part designed for longevity. Order your pre-programmed 2006-2009 Allure Transmission Module today and restore the smooth, reliable performance your car was built for.