Are you experiencing frustrating and unpredictable shifting in your Buick LaCrosse? A faulty Transmission Control Module (TCM) can disrupt your car’s smooth performance, causing harsh gear changes, warning lights, and even leaving you stuck in limp mode. This direct-fit T42 TCM is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a simple, plug-and-play installation that restores the quiet, reliable ride you expect from your Buick.
Common Symptoms & Your Solution
If your vehicle is exhibiting any of the following signs, a failing TCM is the likely culprit. This module is engineered to resolve these exact issues:
- Harsh, erratic, or delayed gear shifts
- Vehicle stuck in a single gear (limp mode)
- Active Check Engine Light or Transmission Warning Light
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- A sudden drop in fuel economy
- Complete failure to shift gears
Installing our pre-programmed 2006-2009 Buick LaCrosse Transmission Control Module 24240449 is the most effective way to permanently fix these problems and get your car operating correctly again.
Features & Benefits
- ✔ Plug & Play Installation: This module is professionally programmed to your vehicle’s VIN. This critical step ensures it works perfectly right out of the box, eliminating the need for expensive and time-consuming dealership programming.
- ✔ Restored Performance: By precisely managing shift points, torque converter lockup, and line pressure, this TCM brings back the smooth, responsive acceleration your LaCrosse was designed for.
- ✔ Engineered for Reliability: Built to meet or exceed strict OEM standards, this module provides a dependable, long-term solution to common transmission electronic failures.
- ✔ Clear Stubborn Codes: This unit is programmed with the latest GM software updates to resolve common transmission-related DTCs and prevent them from returning.
- ✔ Guaranteed Protection: This unit is backed by our one-year replacement warranty.
Expert Insight: The Power of VIN Programming
Why is VIN programming so important? Your vehicle’s transmission doesn’t operate on generic settings. It relies on a complex set of data specific to your car’s engine, tire size, and other factory options. Our programming process writes this exact data to the module before it ships. This means the TCM knows precisely how your LaCrosse should behave, ensuring optimal shift strategy, fuel efficiency, and electronic communication. Skipping this step is like giving your car amnesia—it leads to the very performance issues you’re trying to solve. We handle it for you, so your repair is done right the first time.
Don’t let a faulty module compromise your driving experience. This 2006-2009 Buick LaCrosse Transmission Control Module 24240449 is the trusted, hassle-free way to restore your vehicle’s transmission to perfect working order. With no core charge required, you can complete the repair without the inconvenience of sending the old part back. This part is also a direct replacement for a wide range of GM vehicles, including the Impala, Tahoe, Sierra, and more, making it a versatile and reliable solution. Order your 2006-2009 Buick LaCrosse Transmission Control Module 24240449 today and drive with confidence once again.
Frequently Asked Questions
What does a Transmission Control Module do?
The TCM acts as the brain for your automatic transmission. It receives data from various sensors on the engine and vehicle, and uses this information to control when the transmission shifts gears, how firmly it shifts, and when the torque converter locks up, ensuring smooth and efficient operation.
Is this module difficult to install?
For most models, including the Buick LaCrosse, installation is straightforward. The TCM is typically located in the engine compartment inside or near the air cleaner housing. The process usually involves disconnecting the battery, unplugging the old module, bolting the new one in its place, and reconnecting the electrical harnesses. It can often be completed in under 30 minutes with basic tools.
Do I need to take my car to a dealer after installation?
No. The main benefit of our module is that it comes pre-programmed to your vehicle’s specific VIN. This means you do not need any additional programming or setup from a dealership, saving you significant time and money. It is ready for installation right out of the box.
How do I know if my TCM is the problem?
Common signs of a failing TCM include harsh or erratic shifting, the vehicle getting stuck in one gear (limp mode), and the illumination of the check engine or transmission warning light. Diagnostic codes like P0700 often point directly to a transmission control system fault.
Will this part fix check engine light codes like P0700?
Yes. A code like P0700 is a general fault code indicating the TCM has detected a problem. By replacing the faulty module with this correctly programmed unit, you resolve the root cause of the error, which will allow you to clear the code and keep it from returning.
Is there a core charge for my old part?
No, there is no core charge required for this part. You can keep your old module, which simplifies the repair process and saves you the hassle and expense of a core return.