Restore the Smooth, Effortless Drive to Your Buick LaCrosse
Is your Buick LaCrosse suffering from harsh, unpredictable shifting, or is it stuck in limp mode? These frustrating issues often point directly to a failing Transmission Control Module (TCM). This replacement T42 TCM, service number 24234274, is the definitive solution to restore the quiet, reliable performance you expect from your vehicle. We pre-program this module to your car’s specific VIN, ensuring it works perfectly right out of the box, with no expensive dealership programming required. Get back on the road with confidence and enjoy a seamless driving experience once again.
Common Symptoms & Your Solution
A faulty TCM can cause a host of problems that disrupt your daily drive. If you’re experiencing any of the following, this module is designed to be the direct fix. By replacing your old unit, you can resolve persistent diagnostic trouble codes (DTCs) like P0700, P0750, or other solenoid-related faults that trigger your check engine light. This specific 2006-2009 Buick LaCrosse Transmission Control Module is engineered to correct these issues and restore full communication between your engine and transmission.
- Harsh, erratic, or delayed gear shifts
- Vehicle stuck in a single gear (limp mode)
- Check Engine Light or Transmission Warning Light is on
- Failure to upshift or downshift properly
- Noticeable decrease in fuel economy
- Intermittent loss of communication with the transmission
Features & Benefits
- ✔ Plug & Play Installation: This module arrives pre-programmed to your vehicle’s exact VIN. This eliminates the need for a trip to the dealer for costly flashing, allowing for a straightforward installation.
- ✔ Restores Smooth Performance: By precisely managing shift points, torque converter lockup, and line pressure, this TCM brings back the factory-smooth shifting your LaCrosse is known for.
- ✔ OEM-Quality Engineering: Built to meet or exceed original equipment specifications, ensuring dependable operation and long-term reliability for your daily commute.
- ✔ Solves Common Fault Codes: Directly addresses transmission-related DTCs, helping you clear that persistent check engine light and pass inspections.
- ✔ No Core Charge: Keep your old part without the hassle or expense of returning a core. The price you see is the price you pay.
- ✔ Guaranteed Protection: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
In a modern vehicle like your Buick LaCrosse, the TCM doesn’t just change gears; it’s in constant communication with the Engine Control Module (ECM) and other vehicle systems. A generic, non-programmed module can’t speak this unique language, leading to persistent performance issues or even complete incompatibility. Our VIN-specific programming ensures this 2006-2009 Buick LaCrosse Transmission Control Module has the exact software and calibrations your car left the factory with. This is the key to a successful, lasting repair that restores not just function, but the original driving feel and efficiency.
Frequently Asked Questions
Do I need to have a dealer program this module?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready for a plug-and-play installation.
Where is the TCM located on my 2006-2009 Buick LaCrosse?
On this specific model, the Transmission Control Module is typically found inside or underneath the lower air cleaner housing in the engine compartment, making it accessible for replacement.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause, it’s essential to have the vehicle scanned for other, more specific codes (e.g., P0751, P0756) to confirm the TCM is the primary point of failure.
Is this a difficult part to install myself?
For someone with moderate mechanical experience, the installation is straightforward. It typically involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. However, we always recommend professional installation if you are not comfortable performing the repair yourself.
What happens if I continue driving with a bad TCM?
Continuing to drive with a failing TCM can lead to poor fuel economy, unpredictable vehicle behavior, and potentially cause excessive wear or internal damage to your transmission due to improper shifting and line pressure control.