Restore Your Buick’s Signature Smoothness
Is your 2006-2009 Buick Allure suffering from jerky shifting, delayed gear engagement, or an illuminated check engine light? These are classic signs of a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty TCM can ruin the comfortable, quiet ride your Allure was designed for. In my 20 years of experience, I’ve seen countless GM vehicles, including the Allure, get stuck in ‘limp mode’ or exhibit erratic behavior due to a failing module. This isn’t just an annoyance—it’s a reliability issue that can affect fuel economy and cause further transmission wear.
This OEM-quality T42 TCM, part number 24235754, is the definitive solution. We pre-program it to your vehicle’s specific VIN, ensuring it works perfectly right out of the box. You can skip the expensive dealership visit for programming and get your Buick back to shifting flawlessly. This is the same reliable fix I’ve recommended to hundreds of customers, restoring performance and peace of mind.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Buick Allure with a complaint that stumped two other shops: intermittent, harsh 2-3 shifts and a random P0700 code that would appear and disappear. They were worried about a full transmission rebuild. After checking the basics (fluid level and condition), I focused on the electronics. Using a professional scan tool, I monitored the TCM’s command signals. I noticed the signal to the 2-3 shift solenoid would momentarily drop out, causing the harsh shift. This pointed directly to an internal fault in the original TCM. We installed one of our VIN-programmed modules, and the problem was solved instantly. The customer saved thousands and got their smooth-driving car back the same day.
Is Your Buick Allure Showing These Transmission Issues?
- âś” Unpredictable or harsh gear changes that make driving unpleasant.
- âś” The vehicle is stuck in a single gear (limp mode) and won’t shift up or down.
- âś” Check Engine Light or Transmission Warning Light is on, with codes like P0700, P0750, or other solenoid-related DTCs.
- âś” A noticeable delay when shifting from Park to Drive or Reverse.
- âś” Poor acceleration and a significant drop in fuel efficiency.
- âś” Complete loss of communication with the transmission module.
DIY-Friendly Installation Guide for Your Allure
Replacing the TCM on your Buick Allure is a straightforward job that most DIYers can complete in under 30 minutes with basic hand tools. This will get you back on the road without a costly shop bill.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts and help reset the system.
- Locate the Module: On the 2006-2009 Allure, the TCM is typically found attached to the lower air cleaner housing in the engine bay. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harness connectors. Press the release tabs firmly. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Mount your new, pre-programmed TCM in the same location and secure it with the original bolts. Reconnect the electrical harnesses, ensuring they click securely into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. While the module is plug-and-play, it’s good practice to use a basic OBD2 scanner to clear any stored fault codes from the previous failure.
Verified Vehicle Compatibility
This module is a direct-fit replacement for the original part in the following vehicles. Please verify the location on your specific model, as it can vary.
- Buick Allure: 2006-2009 (Transmission; lower air cleaner housing)
- Buick LaCrosse: 2006-2009 (Transmission; lower air cleaner housing)
- Chevrolet Impala: 2006-2011 (Transmission; lower air cleaner housing)
- Pontiac Grand Prix: 2006-2008 (Transmission; lower air cleaner housing)
- And many other GM models from 2006-2014. See full list for details.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means we load your vehicle’s unique Vehicle Identification Number (VIN) and the latest GM software onto the module before shipping. This ensures it communicates perfectly with your car’s engine computer and other systems, eliminating the need for expensive programming at a dealership. It’s a true plug-and-play solution.
Will this 2006-2009 Allure TCM fix my P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer, indicating a transmission-related problem. If the root cause is a failing TCM, then yes, replacing it with our module will resolve the code and the underlying issue.
Is this installation difficult for someone with basic mechanical skills?
Not at all. For the Buick Allure, the location under the air cleaner housing is accessible. With basic tools like a socket set, you can swap the module in about 30 minutes. Our step-by-step guide makes it even easier.
Do I need to return my old TCM?
No, there is no core charge or requirement to send your old part back. You can dispose of it or keep it, making the process simple and hassle-free.