Restore Your GM Vehicle’s Shifting Performance
Is your 2006-2009 Chevrolet Uplander experiencing harsh shifting, getting stuck in gear, or displaying a check engine light with transmission 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 gear changes, managing torque converter lockup, and ensuring overall driveline efficiency. When it fails, it can lead to poor performance, decreased fuel economy, and potentially catastrophic transmission damage. This OEM-quality GM T42 TCM, part number 24255280, is the definitive solution to restore your vehicle’s factory performance.
Expert Pro Tip: Before installing your new TCM, disconnect the vehicle’s battery for at least 15 minutes. This helps clear any residual learned values from the old, faulty module and allows the vehicle’s computer systems to properly recognize the new, correctly programmed unit upon startup. This simple step can prevent communication errors and ensure a smooth first drive.
Symptoms of a Failing 2006-2009 Uplander Transmission Module
A faulty TCM can manifest in various ways, often mimicking mechanical transmission problems. If you’re experiencing any of the following issues, your transmission module is the likely culprit. Replacing it can save you from a costly and unnecessary transmission rebuild.
- ✔ Harsh or erratic shifting, including banging into gear or delayed engagement from park to drive.
- ✔ Vehicle entering “limp mode,” where it is stuck in a single gear (usually 2nd or 3rd) to prevent further damage.
- ✔ The check engine light or a dedicated transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700 (Transmission Control System Malfunction) or various solenoid-specific codes (e.g., P0750, P0751).
- ✔ Complete loss of upshifting or downshifting capabilities.
- ✔ A noticeable drop in fuel efficiency as the transmission operates incorrectly.
- ✔ Intermittent or total failure of communication with the scan tool, indicating a dead module.
The Plug-and-Play Solution: VIN Programmed for Your Vehicle
The biggest hurdle in replacing a modern electronic module is programming. Dealerships often charge hundreds of dollars for this service alone. We eliminate that step entirely. This T42 TCM arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). Using the latest GM software updates, we ensure that the module is loaded with the correct calibration for your Uplander’s engine, transmission, and tire size. This guarantees a true plug-and-play installation—no expensive trips to the dealer, no special tools required. Simply install the module, reconnect your battery, and drive away with confidence.
Broad GM Compatibility
While this part is a perfect fit for the 2006-2009 Chevrolet Uplander, the T42 TCM was a workhorse for General Motors, used across dozens of models equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is a direct replacement for vehicles such as the Chevrolet Silverado, Tahoe, Impala, GMC Sierra, Buick LaCrosse, Pontiac G6, and many more. This module is interchangeable with a wide array of service numbers, including 24252114, 24234503, 24230461, and 24242391, ensuring you get the correct part for your repair.
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming is the process of loading your vehicle’s specific software and calibrations onto the TCM. This ensures the module communicates correctly with the engine computer and other systems, controlling shift points, line pressure, and torque converter lockup precisely as the manufacturer intended. Without it, the vehicle may not start, shift properly, or may display error codes.
Is this a difficult part to install?
No, for most DIY mechanics, the installation is straightforward. On the Chevrolet Uplander, the TCM is typically located on the LH strut tower. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job can usually be completed in under 30 minutes.
Do I need to return my old TCM?
No core charge is required for this part. You can keep your old module, recycle it, or dispose of it at your convenience without the hassle of shipping it back to us.
Will this fix my P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem and has requested the check engine light to be turned on. While this module will resolve the issue if the TCM itself is faulty, it’s essential to check for other codes that pinpoint the specific issue (like a solenoid or sensor). In many cases, a failing TCM is the root cause of these secondary codes.
What if I have a different GM vehicle?
This T42 TCM fits a vast range of GM cars, trucks, and SUVs from 2006-2014. Please review the detailed fitment list on this page or contact us with your VIN to confirm compatibility for your specific model, such as a Silverado, Tahoe, or Impala.