Is your 2006-2009 Buick LaCrosse suffering from harsh, delayed, or unpredictable shifting? A failing Transmission Control Module (TCM) can disrupt your vehicle’s performance, turning its signature smooth ride into a stressful and unreliable experience. Restore your car’s precision and comfort with this expertly prepared T42 Transmission Control Module, pre-programmed specifically for your vehicle’s VIN. This module is the definitive solution for drivers seeking a reliable, dealership-free fix to get their car back on the road and running perfectly.
Common Symptoms & Your Solution
A faulty TCM can manifest in several ways, often triggering warning lights and making the vehicle unsafe or unpleasant to drive. If you’re experiencing any of the following issues, this module is designed to be the direct solution:
- Sudden, harsh gear changes or a feeling of the transmission slipping.
- The vehicle entering “limp mode,” often stuck in 2nd or 3rd gear.
- An illuminated Check Engine Light or Transmission Warning Light.
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults.
- Failure to upshift or downshift correctly, leading to poor acceleration and decreased fuel economy.
By replacing your old unit with our professionally programmed 2006-2009 Buick LaCrosse Transmission Control Module, you are not just swapping a part; you are installing a complete, updated solution that directly addresses these common failure points.
Features & Benefits
- ✔ VIN-Specific Programming: We program this module to your car’s exact Vehicle Identification Number (VIN) before shipping. This ensures 100% compatibility and means no expensive trips to the dealership for additional programming are required. It’s a true plug-and-play solution.
- ✔ Restored Drivability: This T42 TCM restores crisp, smooth shifting and proper torque converter operation, bringing back the quiet and comfortable ride you expect from your Buick.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications, this module provides dependable, long-lasting performance you can count on for years to come.
- ✔ Simple Installation: Located in the lower air cleaner housing on the LaCrosse, this module can typically be replaced in under 30 minutes with basic tools, making it a manageable job for a home mechanic.
- ✔ Warranty Protection: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench
“Many people don’t realize that a modern TCM is more than just a simple electronic part—it’s the brain of the transmission, constantly communicating with the engine computer. That’s why our VIN programming service is so critical. We load the latest GM software updates specific to your LaCrosse, which often corrects factory flaws that the original module had. This means you’re not just getting a replacement; you’re getting a part that performs better and more reliably than the one that failed. It’s the key to a lasting repair and avoiding frustrating post-installation issues.”
Don’t let a faulty TCM compromise your vehicle’s safety and performance. This programmed 2006-2009 Buick LaCrosse Transmission Control Module is the most effective and efficient way to solve your transmission problems and drive with confidence once again. Order yours today and experience the difference.
Frequently Asked Questions
What does a Transmission Control Module do?
The TCM acts as the central computer for your automatic transmission. It collects data from various sensors on the engine and transmission to control shift points, line pressure, and torque converter lockup, ensuring smooth and efficient operation.
Is this part difficult to install?
For the 2006-2009 Buick LaCrosse, the TCM is located in the lower air cleaner housing. Installation is generally straightforward and can be completed with basic hand tools in under an hour. We always recommend disconnecting the battery before starting the replacement.
How do I know this is the right part for my LaCrosse?
This module is specified for 2006-2009 Buick LaCrosse models. The critical step is our VIN programming service. When you provide your VIN during checkout, we ensure the module’s software is a perfect match for your vehicle’s specific configuration, guaranteeing compatibility.
Will this fix my specific transmission error codes like P0700?
Yes. This module is designed to resolve common transmission-related DTCs, including general fault codes like P0700 and specific solenoid codes. A properly functioning, correctly programmed TCM is the core solution for these electronic faults.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep or dispose of your old module at your convenience, making the process hassle-free.
What happens after I place my order?
After you place your order and provide your vehicle’s VIN, our technicians will professionally program the module with the latest GM software for your specific car. It will then be securely packaged and shipped directly to you, ready for installation right out of the box.