Restore Your Buick’s Smooth Ride
Is your 2006-2011 Buick Lucerne suffering from jarring shifts, getting stuck in gear, or throwing transmission codes? A faulty Transmission Control Module (TCM) is one of the most common culprits behind these frustrating and concerning issues. As the electronic brain of your automatic transmission, the TCM dictates every gear change and torque converter operation. When it fails, your car’s performance and reliability suffer. This T42 TCM, part number 24235754, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a seamless, plug-and-play repair.
Case Study: The Lucerne That Wouldn’t Shift
A customer brought in a 2008 Buick Lucerne with the classic symptoms: the car was stuck in 3rd gear (limp mode) and the check engine light was on, showing a P0700 (Transmission Control System Malfunction) code. After confirming the wiring harness and solenoids were good, we identified a failed internal processor in the original TCM. Instead of a costly trip to the dealership for a new module and programming, we installed one of our VIN-programmed T42 units. The entire job took less than 30 minutes, cleared all codes, and the car was shifting perfectly again. This is a repair that saves both time and hundreds of dollars.
Why Choose a VIN-Programmed Module?
The biggest headache with replacing modern electronic modules is the need for expensive, specialized programming at a dealership. Our process eliminates that step entirely. We flash this 2006-2011 Lucerne Transmission Control Module with the latest GM software updates matched directly to your car’s VIN. This ensures all shift points, pressure controls, and diagnostic parameters are perfectly calibrated right out of the box. You get an OEM-level repair without the OEM-level price tag or inconvenience.
Is Your Buick Showing These Symptoms?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs attention:
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in a single gear, often called “limp mode,” to prevent further damage.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on your dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ A sudden drop in fuel economy or the transmission overheating.
- ✔ Complete loss of communication with the transmission, leading to a no-shift condition.
A Straightforward Guide to Installation
Replacing the TCM on your Lucerne is a job most DIY mechanics can handle in their own garage. For the 2006-2011 Lucerne, the TCM is typically located in the left-hand (driver’s side) engine compartment. Follow these simple steps:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: Find the TCM in the LH engine compartment. It’s a small metal box with electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount your new, VIN-programmed module in the same location and securely fasten the bolts. Reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While our programming resolves most issues, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24235754 and is interchangeable with many other GM service numbers. While this page focuses on the 2006-2011 Lucerne Transmission Control Module, it also fits a wide range of other GM vehicles. Please verify your part number or consult the list below:
- Buick: Lucerne (2006-2011), LaCrosse (2006-2009), Allure (2006-2009), Rainier (2006-2007), Rendezvous (2006-2007)
- Chevrolet: Silverado, Tahoe, Suburban, Avalanche, Express, Impala, Monte Carlo, HHR, Cobalt, Colorado, SSR
- GMC: Sierra, Yukon, Savana, Envoy, Canyon
- Cadillac: DTS (2006-2011)
- Pontiac: G6, Grand Prix, G5, Pursuit
- Saturn: Vue, Aura, Ion
- And more… A full fitment list is provided in the vehicle compatibility chart.
Do I need to take my car to the dealer after installation?
Do I need to take my car to the dealer after installation?
No. This module is fully pre-programmed to your vehicle’s VIN. It is a plug-and-play solution that does not require any additional dealership programming or calibration, saving you time and money.
What information do you need to program the module?
We require your vehicle’s 17-digit Vehicle Identification Number (VIN) to ensure the module is programmed with the correct software and calibrations for your specific car.
Is this a reliable part?
Absolutely. Each module is built to meet or exceed OEM specifications and undergoes rigorous testing to ensure long-lasting performance and reliability. We back it with a one-year warranty for your peace of mind.
Is there a core charge for my old part?
No, there is no core charge required for this part. You can keep or dispose of your old module without the hassle of returning it.