Restore Your LaCrosse’s Signature Smooth Ride
Is your 2006-2009 Buick LaCrosse suffering from harsh, erratic shifting or getting stuck in gear? A faulty Transmission Control Module (TCM) can ruin the comfortable, reliable driving experience you expect. This genuine GM T42 TCM, service part 24239926, is the definitive solution. It arrives expertly programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation. Get your transmission shifting precisely as it did from the factory and regain your confidence on the road.
Common Symptoms & Your Solution
A failing TCM can cause a cascade of frustrating and potentially damaging issues. If you’re experiencing any of the following, this module is the solution you need:
- Abrupt, harsh, or delayed gear shifts
- Vehicle stuck in “limp mode” (usually 2nd or 3rd gear)
- Check Engine Light or Transmission Warning Light is on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes
- Failure to upshift or downshift correctly
- Noticeably decreased fuel economy
By replacing your old unit with our pre-programmed Buick LaCrosse transmission control module 24239926, you directly address the root cause of these problems, restoring communication between your engine and transmission for flawless performance.
Features & Tangible Benefits
- ✔ Plug & Play Installation: This module is pre-programmed to your car’s VIN. No extra trips to the dealer for flashing—simply install it, and you’re ready to go.
- ✔ Restored Performance: Loaded with the latest GM software updates, it ensures your transmission operates with optimal shift points, torque converter lockup, and efficiency.
- ✔ Solve Annoying Warning Lights: Directly resolves common transmission-related DTCs that trigger the check engine light, helping you pass inspections and drive worry-free.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications, ensuring long-lasting reliability and durability for your daily drive.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty.
- ✔ Broad Interchange Compatibility: A direct replacement for a wide range of part numbers, including 24252114, 24234503, 24230461, 24239926, and more.
Expert Insight: The Critical Role of VIN Programming
The T42 TCM is more than just a part; it’s the central computer for your automatic transmission. Every Buick LaCrosse has unique characteristics stored in its VIN, and the TCM needs this exact data to manage shift pressures and timing correctly. Installing a generic, non-programmed module is a recipe for continued problems. Our meticulous VIN-programming service ensures this Buick LaCrosse transmission control module 24239926 communicates flawlessly with your vehicle’s entire system from the moment it’s installed, saving you hundreds in diagnostic and programming fees at a workshop.
Frequently Asked Questions
Is this module difficult to install?
No, installation is straightforward for someone with basic mechanical skills. The module is located in the engine bay (typically in the lower air cleaner housing on the LaCrosse) and is designed for plug-and-play replacement. The entire process often takes less than 30 minutes.
Do I need to take my car to a dealer after installation?
Absolutely not. The primary benefit of our service is that the module arrives pre-programmed to your specific VIN. This eliminates the need for any additional programming or setup that a dealership would charge for.
Will this fix a P0700 trouble code?
Yes, a P0700 code is a general transmission fault request that is very often triggered by a failing TCM. Replacing the module is a common and effective way to resolve this and related transmission codes.
What happens if I install a module that isn’t programmed to my VIN?
An unprogrammed or incorrectly programmed module will not communicate properly with your vehicle’s other computers. This can result in the same shifting problems you were trying to fix, or even create new ones. VIN programming is essential for proper function.
Is there a core charge for my old part?
No, we do not require a core return. You can keep or dispose of your old part without any additional hassle or charges.