Restore Your Buick’s Signature Smooth Shifting
Is your 2006-2009 Buick LaCrosse suffering from harsh, erratic shifting, or a frustrating check engine light? A failing transmission control module (TCM) can disrupt the comfort and reliability you expect from your vehicle. This pre-programmed T42 Transmission Control Module is the definitive solution, engineered to restore your car’s original performance and get you back on the road with confidence. It arrives programmed to your specific Vehicle Identification Number (VIN), making installation a straightforward, plug-and-play process without requiring an expensive trip to the dealership.
Common Symptoms & Your Solution
A faulty TCM can manifest in several ways, turning your smooth ride into a stressful experience. If you’re noticing any of the issues below, this module is designed to be the direct-fit remedy. This is the ideal replacement 2006-2009 Buick LaCrosse Transmission Control Module for drivers seeking a lasting fix.
- Abrupt, harsh, or delayed gear shifts
- Vehicle stuck in a single gear (limp mode)
- Illuminated Check Engine or Transmission warning lights
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes
- Failure to upshift or downshift properly
- Noticeable decrease in fuel economy
Features & Benefits
- ✔ Plug & Play Installation: This module is expertly programmed to your vehicle’s VIN before shipping. This critical step ensures perfect communication between the TCM and your LaCrosse’s other systems, eliminating the need for dealership programming.
- ✔ Restored Performance: By precisely managing shift points, torque converter lockup, and line pressure, this TCM brings back the seamless, quiet acceleration your Buick is known for.
- ✔ OEM-Quality Engineering: Built to meet or exceed original equipment standards, ensuring dependable operation and long-term durability for your daily commute or long road trips.
- ✔ Comprehensive Solution: Directly addresses common electronic transmission failures, providing a reliable fix that prevents recurring issues and restores communication within the powertrain.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
In modern vehicles like your Buick LaCrosse, the TCM isn’t just a simple switch; it’s the brain of your transmission. It constantly communicates with the Engine Control Module (ECM), ABS, and other systems. A generic, unprogrammed module from a parts store simply won’t work correctly. It can lead to persistent error codes, poor performance, and even damage to your transmission. Our VIN-specific programming loads the exact software and calibration files your vehicle had from the factory, ensuring every component works in perfect harmony from the moment you install it. This is the key to a successful and lasting repair.
Don’t let a faulty TCM compromise your vehicle’s safety and performance. Installing this high-quality 2006-2009 Buick LaCrosse Transmission Control Module is the most effective way to solve your shifting problems for good. The straightforward installation process, typically taking less than 30 minutes, makes this the perfect solution for both seasoned mechanics and DIY-minded owners. For your LaCrosse, the module is typically found near the lower air cleaner housing, making it easily accessible in the engine bay. By choosing our pre-programmed 2006-2009 Buick LaCrosse Transmission Control Module, you’re investing in peace of mind and the restored comfort of your drive.
Frequently Asked Questions
Does this module require any additional programming after installation?
No. This Transmission Control Module comes fully programmed to your vehicle’s specific VIN. It is a true plug-and-play solution, designed to work immediately upon installation without any need for a scan tool or a visit to the dealership for programming.
Where is the TCM located on my 2006-2009 Buick LaCrosse?
On the 2006-2009 Buick LaCrosse, the TCM is typically located in the engine compartment, attached to the lower air cleaner housing. Always disconnect the vehicle’s battery before starting the replacement process for safety.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault code, indicating that the TCM has detected a problem. While this module often resolves the root cause of a P0700 code, it’s always best to have the specific secondary codes read (e.g., P0751, P0756) to confirm the issue lies with the module or a specific solenoid. In many cases, a faulty TCM is the culprit.
Is this a difficult part to replace myself?
For someone with basic mechanical skills, the replacement is very straightforward. It typically involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. Since our unit is pre-programmed, there are no complex electronic steps involved, making it an accessible DIY repair.
How do I ensure this is the correct part for my car?
This module is guaranteed to fit the 2006-2009 Buick LaCrosse. You can also verify by matching the service number on your original part to one of the compatible numbers listed, such as 24252114, 24242391, or 24234503. Providing your VIN at checkout ensures we program it perfectly for your specific vehicle.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty, giving you confidence in the quality and reliability of your purchase.