Restore Peak Transmission Performance in Your GM Vehicle
Is your 2006-2011 Buick Lucerne or other GM vehicle suffering from erratic shifting, getting stuck in gear, or displaying transmission-related error codes? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating smooth gear changes, managing torque converter lockup, and ensuring overall drivetrain efficiency. When it fails, it can lead to a frustrating and potentially damaging driving experience. This genuine quality T42 TCM, service part number 24256960, is the definitive solution, pre-programmed to your vehicle’s specific VIN for a true plug-and-play installation.
From the Diagnostic Bay
We had a 2009 Chevy Tahoe come into the shop with the check engine light on and a complaint of harsh, unpredictable shifting. The customer said it would slam into gear from a stop and sometimes felt like it was slipping between 2nd and 3rd. A quick scan pulled code P0700 (Transmission Control System Malfunction) and a few solenoid-specific codes. Instead of chasing individual solenoids, our experience pointed directly to the T42 TCM, which is known for these intermittent electronic failures. We installed a VIN-programmed module, cleared the codes, and the Tahoe drove like new. The customer was thrilled to have their smooth, reliable truck back without a costly trip to the dealership for programming.
Diagnosing a Faulty Lucerne Transmission Control Module
A failing TCM can manifest in various ways, often mimicking internal transmission problems. Before condemning your transmission, it’s crucial to consider the module as the potential culprit, especially if the issues are intermittent or electronic in nature. This replacement module is designed to correct these exact problems, restoring the communication between your engine and transmission for flawless operation.
Common Symptoms of TCM Failure
- ✔ Harsh or delayed gear engagement from Park to Drive or Reverse.
- ✔ Erratic, unpredictable, or slipping shifts while driving.
- ✔ Vehicle enters “limp mode,” often stuck in 2nd or 3rd gear.
- ✔ The check engine light or transmission warning light is illuminated on the dash.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- ✔ A noticeable decrease in fuel economy due to inefficient shifting.
- ✔ Inability to upshift or downshift correctly.
Key Features and Direct Benefits
This isn’t just a replacement part; it’s a complete solution designed for reliability and ease of installation. We handle the complex part so you can get back on the road faster.
- ✔ VIN-Programmed for Your Vehicle: We program the module with your vehicle’s VIN and the latest GM software updates before it ships. This ensures perfect compatibility and eliminates the need for expensive dealership programming.
- ✔ Plug-and-Play Installation: With the programming done, installation is a simple mechanical swap. No special tools or software are required.
- ✔ Restores Smooth Operation: By precisely controlling shift points and line pressure, this module eliminates harsh shifting and restores the smooth ride you expect from your vehicle.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications for durability and performance, ensuring a long-lasting repair. Backed by a one-year warranty for your peace of mind.
- ✔ Broad Compatibility: This T42 TCM is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It interchanges with numerous part numbers, including 24252114, 24234503, 24230461, and more.
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming involves loading your vehicle’s specific Vehicle Identification Number and corresponding software onto the module. This ensures the TCM communicates correctly with your vehicle’s other computers, like the Engine Control Module (ECM), for optimal shift strategy, fuel economy, and overall performance. Without it, the module will not function correctly.
Is this part difficult to install myself?
For most DIY mechanics, the installation is straightforward. The TCM is typically located in the engine bay (e.g., next to the battery, on the strut tower, or under the air cleaner box). The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job can often be completed in under 30 minutes.
Will this fix my specific transmission error code?
This module is a common fix for a host of transmission codes, especially P0700 and various solenoid performance codes. If your diagnostics point to an electronic control failure rather than a mechanical one, replacing the TCM is the correct repair. Our programming ensures it resolves common software-related DTCs.
Do I need to return my old part (core charge)?
No, there is no core charge required for this part. You can keep your old module, which simplifies the process and saves you the hassle and expense of return shipping.
How do I provide my VIN for programming?
You will be prompted to enter your vehicle’s 17-digit VIN during the checkout process. Please double-check it for accuracy to ensure a perfectly programmed module is sent to you.