Is Your Buick Lucerne Shifting Erratically?
A smooth ride in your 2006-2011 Buick Lucerne can quickly turn frustrating when the transmission starts acting up. Harsh shifts, delayed gear engagement, or getting stuck in limp mode are not just annoying—they’re signs that the brain of your transmission, the Transmission Control Module (TCM), may be failing. This vital component orchestrates every gear change, ensuring your engine’s power is delivered efficiently to the wheels. When it malfunctions, it can mimic a catastrophic transmission failure, leading to costly and unnecessary repairs.
This T42 Transmission Control Module, part number YNXS, is the definitive solution for restoring the precise, factory-new shifting performance to your vehicle. It’s engineered to meet and exceed original equipment specifications for a wide range of General Motors vehicles, including your Lucerne.
From the Diagnostic Bay
We had a 2009 Chevrolet Tahoe come in, stuck in third gear with a P0700 code. The owner was convinced his 4L60E transmission needed a full rebuild, a quote he’d gotten for over $3,000. After a quick scan, we noticed communication errors with the TCM. Instead of a rebuild, we installed a VIN-programmed T42 module. In under an hour, the Tahoe was shifting perfectly, all codes were cleared, and the customer saved thousands. It’s a classic case of the ‘brain’ failing, not the ‘body’.
Symptoms of a Failing Buick Lucerne TCM
- ✔ Sudden, harsh, or jerky gear shifts.
- ✔ The vehicle gets stuck in a single gear (limp mode).
- ✔ Illumination of the Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults.
- ✔ Failure to shift into higher or lower gears.
- ✔ Noticeable decrease in fuel economy.
- ✔ Complete loss of transmission function.
The Plug-and-Play Advantage: VIN Programming Included
What sets this module apart is our complimentary VIN programming service. Before we ship your part, we flash it with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software updates. This critical step ensures the TCM communicates flawlessly with your vehicle’s Engine Control Unit (ECU) and other systems right out of the box. You can skip the expensive trip to the dealership for programming; this module is a true plug-and-play replacement. It arrives ready for installation, designed to resolve common DTCs and restore optimal transmission function immediately.
Key Features and Benefits:
- Direct Fit Solution: Engineered as a direct replacement for OEM part numbers like 24252114, 24234503, 24242391, and YNXS.
- No Core Charge: Keep your old part without any additional fees or the hassle of returning a core.
- Reliable Performance: Built to stringent OEM standards for long-lasting durability and dependable operation.
- Easy Installation: Typically located in the engine compartment (often near the LH strut tower on the Lucerne), installation can be completed in under 30 minutes with basic hand tools.
Don’t let a faulty TCM compromise the performance and safety of your Buick. This pre-programmed module is the most effective and efficient way to get your car back on the road, shifting as it should. Order today and experience the difference a fully functional transmission makes.
Frequently Asked Questions
What does VIN programming do for my TCM?
VIN programming loads your vehicle’s specific software and calibrations onto the module. This ensures it communicates correctly with the engine and other vehicle systems, allowing for proper shift points, torque converter lockup, and overall transmission performance without any additional setup.
Is this a difficult part to install myself?
For most DIY mechanics with basic tools, this is a straightforward installation. The TCM is typically located in an accessible part of the engine bay. The key steps are disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. No special programming tools are required.
Will this TCM 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 of a P0700, it’s essential to have the vehicle scanned for more specific codes (e.g., solenoid circuit faults) to confirm the TCM is the issue. In many cases, replacing a faulty TCM will clear this and related codes.
Do I need to send my old module back?
No. We do not require you to return your old part. There is no core charge associated with this purchase, saving you time and money.
How do I know this is the correct part for my vehicle?
This T42 TCM fits a wide range of 2006-2014 GM vehicles, including the 2006-2011 Buick Lucerne. You can confirm fitment by matching your vehicle’s year and model or by cross-referencing the part number on your existing module with the numbers listed in our description, such as YNXS, 24252114, or 24234503.