Restore Flawless Shifting to Your Buick Lucerne
Is your 2006-2011 Buick Lucerne suffering from harsh shifting, delayed gear engagement, or an illuminated Check Engine Light? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every shift with precision. When it fails, it can lead to poor performance, decreased fuel economy, and even leave you stranded. This genuine OEM-quality GM T42 TCM, service number 24252114, is the definitive solution to restore your vehicle’s drivability and peace of mind.
The Plug-and-Play Solution: Pre-Programmed for Your Vehicle
Forget expensive dealership visits and the hassle of post-installation programming. We take the guesswork out of the repair by programming this module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that the unit arrives ready for a direct, plug-and-play installation. It’s loaded with the latest GM software updates, guaranteeing seamless communication with your vehicle’s other electronic systems and optimal transmission performance from the moment you install it.
We recently had a 2008 Buick Lucerne come into the shop with a complaint of a severe ‘bang’ when shifting from 2nd to 3rd gear. The customer was worried about a costly transmission rebuild. We scanned the vehicle and pulled a P0700 code along with several solenoid performance codes. Instead of jumping to a mechanical failure, we checked the TCM connections first. Finding no issues there, we swapped in a VIN-programmed T42 module. After a quick 20-minute installation and clearing the codes, the car shifted like it just rolled off the factory floor. It’s a prime example of how this single electronic part can mimic a major mechanical failure, and how the right part can provide a simple, effective fix.
Common Symptoms of a Failing 2006-2011 Lucerne Transmission Module
- ✔ Erratic and Harsh Shifting: Experiencing abrupt, jerky, or unpredictable gear changes that make driving uncomfortable.
- ✔ Stuck in Gear or Limp Mode: The vehicle refuses to shift out of a single gear (often 2nd or 3rd) to protect the transmission from further damage.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light illuminates on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes associated with a bad TCM include P0700, P0750, and other solenoid-specific faults.
- ✔ Delayed Engagement: A noticeable pause when shifting from Park into Drive or Reverse.
- ✔ Poor Fuel Economy: Inefficient shifting patterns cause the engine to work harder, consuming more fuel.
- ✔ No Communication: A scan tool may be unable to communicate with the transmission module, indicating a complete failure.
Installation and Compatibility
This T42 TCM is a direct-fit replacement for your 2006-2011 Buick Lucerne. The module is typically located in the engine compartment on the driver’s side (LH engine compartment), making it accessible for a straightforward DIY installation in under 30 minutes. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Once installed, reconnect the battery and use a basic scan tool to clear any stored fault codes. No core charge is required, so you can keep your old part without any hassle.
This module is also a direct replacement for a wide range of other GM vehicles and interchanges with numerous part numbers, including: 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24256960, 24235732, and YNXS.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
VIN programming means we load the module with your vehicle’s specific software and calibration files from GM’s database using your unique 17-digit Vehicle Identification Number. This makes the part electronically identical to your original, ensuring it works perfectly with your engine, ABS, and other systems without needing a trip to the dealer for configuration.
Will this fix a P0700 code on my Buick Lucerne?
A P0700 is a general transmission fault code, indicating that the TCM has detected a problem and requested the Check Engine Light to be turned on. While a faulty TCM itself can cause this code, it often appears alongside other, more specific codes. Replacing the TCM is a very common fix for P0700 when accompanied by other communication or solenoid codes.
Is this a difficult part to install myself?
For most individuals with basic hand tools, this is a very manageable repair. The module is located in the engine bay of the Lucerne and is held in place by a few bolts. The primary steps are disconnecting the battery, swapping the modules, and reconnecting everything. The entire process typically takes less than 30 minutes.
Do I need to send my old module back?
No, there is absolutely no core charge for this part. You can keep, recycle, or dispose of your old module at your convenience without any additional fees or hassle.
How can I be certain this is the correct TCM for my car?
This module is the correct fit for 2006-2011 Buick Lucerne models. You can also verify by matching the part number 24252114 (or any of the listed interchange numbers) to the one on your existing module. Providing us with your VIN during checkout is the best way to guarantee perfect compatibility and programming.