Restore Peak Performance to Your Buick’s Transmission
If you’re dealing with the frustration of a 2006-2011 Buick Lucerne that’s shifting harshly, getting stuck in gear, or throwing transmission-related trouble codes, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Transmission Control Module (TCM) can bring an otherwise reliable vehicle to a standstill. This isn’t just an inconvenience; it’s a safety concern. This OEM-quality T42 TCM, part number 24234274, is the definitive solution to restore the smooth, predictable performance your vehicle had when it left the factory.
The real value here is our expert VIN programming service. Before this module ships, we flash it with your vehicle’s specific VIN and the latest GM software updates. This means it arrives at your doorstep ready for a true plug-and-play installation, completely eliminating the need for an expensive and time-consuming trip to the dealership for programming. You get a reliable fix that saves you time and money.
Case Study: A Tricky Diagnosis
A customer brought in their ’08 Lucerne with the check engine light on and a complaint of it “banging” into gear. The car was stuck in what we call ‘limp mode’—third gear only. A quick scan showed the classic P0700 (Transmission Control System Malfunction) code. While this code can point to many things, experience told me to check the TCM’s communication. Sure enough, the module was intermittently dropping offline. Instead of a costly transmission rebuild, the fix was simple: replacing the faulty TCM. We installed one of our pre-programmed modules, cleared the codes, and the car was shifting perfectly on the test drive. This is a common failure, and this part is the direct, hassle-free solution.
Is Your Buick Exhibiting These Transmission Problems?
A faulty TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your 2006-2011 Lucerne TCM may need replacement:
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in a single gear (limp mode) and won’t shift up or down.
- ✔ 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 noticeable drop in fuel economy or signs of the transmission overheating.
- ✔ Complete loss of communication with the module, leading to a no-start or no-shift condition.
A Straightforward Guide to Installation
One of the best parts of this solution is its simplicity. For most DIYers or any professional mechanic, this is a quick job that can be done in your own garage in under 30 minutes. The 2006-2011 Lucerne TCM is typically easy to access.
- Safety First: Always disconnect the negative terminal on your vehicle’s battery before starting any electrical work.
- Locate the Module: On the Buick Lucerne, the TCM is generally found in the left-hand (driver’s side) of the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed TCM into place and securely reconnect the electrical harnesses.
- Final Steps: Reconnect the battery terminal. While the module is pre-programmed, it’s always 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 Transmission Control Module is a direct fit for the 2006-2011 Buick Lucerne. It is also compatible with a wide range of other General Motors vehicles that use the 4L60E, 4L65E, and 4L70E transmissions. It is interchangeable with part numbers 24252114, 24234503, 24230461, 24235340, and more.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique Vehicle Identification Number (VIN) onto the module before we ship it. This ensures the TCM has the correct software and settings to communicate perfectly with your car’s engine computer and other systems, just like an original part from the dealer.
Will this part fix my P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a failing TCM is the root cause. Replacing it with this module is a very common and effective fix for this and related transmission codes.
Do I need any special tools for this installation?
No. Basic hand tools (like a socket set) are all that’s required to physically swap the module. Because our module comes pre-programmed, you do not need any specialized diagnostic computers or programming tools.
Is there a core charge for my old part?
No, we do not require you to send your old module back. There is no core charge, which simplifies the process for you.
What kind of warranty is included?
This module is backed by our one-year warranty, giving you peace of mind and confidence in your repair.