Programmed 2006-2011 Lucerne TCM 24256960 | T42 Module | Plug & Play

Restore Smooth, Reliable Shifting to Your Buick Lucerne

If you’re experiencing unpredictable shifting, a check engine light, or your 2006-2011 Buick Lucerne is stuck in limp mode, a failing Transmission Control Module (TCM) is the most likely culprit. As the electronic brain of your automatic transmission, the T42 TCM is responsible for every gear change. Over my 20+ years in diagnostics, I’ve seen countless GM vehicles, including the Lucerne, come into the shop with these exact issues. A faulty module can turn a comfortable ride into a stressful, jerky experience. This replacement T42 TCM, part number 24256960, is the definitive, hassle-free solution to get your car driving like new again.

Is Your Buick Exhibiting These Shifting Problems?

A failing TCM will give you clear warning signs. If you notice any of the following, it’s time to consider a replacement 2006-2011 Lucerne TCM to prevent further damage to your transmission.

• ✔ Harsh, erratic, or delayed gear shifts.
• ✔ Vehicle is stuck in one gear (often called “limp mode”).
• ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid codes.
• ✔ Sudden loss of power or failure to accelerate properly.
• ✔ Poor fuel economy and a feeling of the transmission slipping.
• ✔ Complete loss of communication with the transmission module.

Your Straightforward 30-Minute Installation Guide

One of the best features of this module is its simple, plug-and-play installation. Because we program it to your vehicle’s VIN before shipping, you don’t need any special tools or a trip to the dealer. For the Buick Lucerne, the process is very accessible.

1. Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
2. Locate the TCM: On your 2006-2011 Lucerne, the Transmission Control Module is typically found in the left-hand (driver’s side) of the engine compartment.
3. Remove the Old Module: Carefully disconnect the electrical wiring harnesses. Then, unbolt the module from its mounting bracket.
4. Install the New Module: Mount your new, pre-programmed TCM in place, securely reconnect the wiring harnesses, and then reconnect the battery terminal.
5. Final Steps: Start the vehicle. While not always necessary, it’s good practice to use a basic OBD2 scan tool to clear any stored transmission codes after the installation is complete.

Verified Fitment For Your Vehicle

This T42 TCM is a direct replacement for part number 24256960 and is interchangeable with a wide range of other GM service numbers, ensuring broad compatibility. While it is the correct part for the 2006-2011 Lucerne TCM application, it also fits many other popular vehicles. Please verify your model and options below.