End Frustrating Shifting Problems in Your Buick Allure
If your 2006-2009 Buick Allure is suffering from harsh shifts, getting stuck in gear, or throwing transmission-related check engine lights, a failing Transmission Control Module (TCM) is the most likely culprit. As the electronic brain of your automatic transmission, the TCM dictates every gear change and torque converter operation. When it fails, it can make your car feel unreliable and unsafe to drive. This replacement T42 TCM, part number 24235754, is the definitive solution to restore your vehicle’s performance and peace of mind.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Buick Allure with a P0752 code (Shift Solenoid ‘A’ Stuck On) and a transmission that wouldn’t shift past 2nd gear. They had already replaced the solenoid twice at another shop with no success. After a quick data stream analysis, I noticed the command signals from the TCM were erratic. The solenoid was doing what it was told, but the TCM was giving bad commands. We installed one of our VIN-programmed modules, cleared the codes, and the car shifted perfectly. It’s a classic example of how a faulty TCM can mimic other component failures, costing you time and money on unnecessary parts.
Is Your Buick Allure Exhibiting These Telltale Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indication that your module needs replacement. This is especially true if you have a 2006-2009 Allure TCM that is original to the vehicle.
- âś” Harsh, delayed, or unpredictable gear shifts.
- âś” The vehicle enters “limp mode,” often stuck in 2nd or 3rd gear.
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758, or other solenoid-related faults.
- âś” A noticeable decrease in fuel economy due to inefficient shifting.
- âś” Complete loss of communication with the transmission, preventing it from engaging.
DIY-Friendly Installation Guide
One of the biggest advantages of our pre-programmed modules is the straightforward installation. You don’t need a trip to the dealership, saving you significant cost and hassle. For the Buick Allure, the process is simple.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the TCM: On your 2006-2009 Buick Allure, the TCM is conveniently located under the lower air cleaner housing. You will need to remove the airbox to access it.
- Disconnect and Remove: Carefully unclip the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new TCM into place and securely reconnect the electrical connectors. You’ll hear a ‘click’ when they are properly seated.
- Final Steps: Reinstall the air cleaner housing and reconnect the battery terminal. Start the vehicle and use a basic OBD2 scan tool to clear any stored fault codes. Your Allure is now ready for a test drive.
Verified Fitment for Your General Motors Vehicle
This T42 TCM is a direct-fit replacement for a wide range of GM vehicles, ensuring OEM-level function. While this page is focused on the 2006-2009 Allure TCM, it is also compatible with the following models. Please verify the location note for your specific vehicle.
- Buick: Allure (06-09), LaCrosse (06-09), Lucerne (06-11), Rainier (06-07), Rendezvous (06-07)
- Chevrolet: Avalanche 1500 (07-08), Cobalt (06-10), Colorado (08-12), Express Vans (06-14), HHR (06-11), Impala (06-11), Malibu (06-10), Monte Carlo (06-07), Silverado Pickups (07-13), SSR (05-06), Suburban 1500 (07-08), Tahoe (07-09), Trailblazer (06-09)
- GMC: Canyon (08-12), Envoy (06-09), Savana Vans (06-14), Sierra Pickups (07-13), Yukon (07-09)
- Pontiac: G5 (07-10), G6 (06-10), Grand Prix (06-08), Pursuit (06), Montana (06-09), Torrent
- Saturn: Aura (07-09), Ion (06-07), Vue (07-10)
- Cadillac: DTS (06-11)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
What does ‘VIN Programmed’ mean for me?
What does ‘VIN Programmed’ mean for me?
It means this module arrives at your door ready for installation. We flash it with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software. This ensures perfect communication with your car’s other computers, eliminating the need for expensive dealership programming. It’s a true plug-and-play solution.
Do I need to send my old TCM back?
No, there is no core charge or need to return your old part. You can keep it or dispose of it, making the repair process simpler and faster.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (PCM) to turn on the check engine light. In many cases, a faulty TCM is the root cause that triggers the P0700 and other specific transmission codes. Replacing the module with our programmed unit often resolves these codes permanently.
Is this an OEM part?
This is a high-quality replacement part built to meet or exceed original equipment manufacturer (OEM) specifications for performance and durability. It is guaranteed to function just like the original module from the factory.