Restore Peak Transmission Performance in Your GM Vehicle
Is your 2006-2014 Chevrolet Express 2500 or other GM vehicle suffering from erratic shifting, getting stuck in gear, or displaying a 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 smooth gear changes, managing torque converter lockup, and monitoring system health. When it fails, it can leave your vehicle unreliable and unsafe to drive. This genuine OEM-quality T42 TCM, part number 24240449, is the definitive solution to restore your transmission’s functionality and your peace of mind.
From the Diagnostic Bay
We recently had a 2011 Express 2500 work van towed in, stuck in what the owner called “permanent second gear.” The van was sluggish, guzzling fuel, and the transmission warning light was glaring on the dash. A quick scan pulled a P0700 code along with several solenoid circuit faults. Instead of a costly and time-consuming transmission rebuild, we identified the culprit: a faulty TCM. We installed one of our pre-programmed T42 modules. In under 30 minutes, the codes were cleared, and the van was shifting perfectly through all gears on the test drive. The owner was back on the road the same day, saving hundreds in labor and potential lost business.
Diagnosing Your 2006-2014 Express 2500 TCM Failure
A failing TCM can manifest in various ways, often mimicking internal transmission problems. Before condemning your transmission, it’s crucial to consider the module itself. The T42 TCM processes data from multiple sensors to make split-second decisions. Over time, heat, vibration, and electrical fluctuations can degrade internal components, leading to incorrect commands and poor performance. Replacing a faulty module is a common and effective repair for many modern GM automatic transmissions, including the 4L60E, 4L65E, 4L70E, and 4L80E.
Common Symptoms of a Defective TCM
- ✔ Harsh Shifting: Experiencing abrupt, jerky, or delayed gear changes that make driving uncomfortable.
- ✔ Limp Mode Activation: The vehicle gets stuck in a single gear (usually 2nd or 3rd) to prevent further damage, severely limiting speed.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light illuminates on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes like P0700 (Transmission Control System Malfunction) or various solenoid-specific codes (e.g., P0751, P0756) are present.
- ✔ No Upshift or Downshift: The transmission refuses to shift into higher or lower gears as needed.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter operation lead to a noticeable drop in MPG.
- ✔ Complete Communication Loss: In severe cases, the TCM stops communicating with the Engine Control Module (ECM), leading to a no-start condition or total transmission failure.
The Plug-and-Play Advantage: VIN Programming Included
One of the biggest hurdles in replacing modern electronic modules is the need for expensive dealership programming. We eliminate that step entirely. When you order this 2006-2014 Express 2500 TCM, we pre-program it using your vehicle’s unique VIN. This process flashes the module with the latest GM software and calibrates it specifically for your van’s configuration. The result is a true plug-and-play part that is ready for installation right out of the box. Simply install the module, connect the wiring, and you’re ready to go—no additional tools or trips to the mechanic required.
This module is a direct replacement and cross-references with numerous part numbers, including 24252114, 24234503, 24240449, and many others, ensuring wide compatibility across the GM lineup from Chevrolet, GMC, Cadillac, Buick, and more. Built to strict OEM specifications, it comes with a one-year warranty for lasting reliability.
Frequently Asked Questions
What does “VIN-programmed” mean for this TCM?
It means we load the module with the specific software and calibration files from GM that match your vehicle’s exact build, including engine, transmission type, and axle ratio. This ensures it works perfectly right out of the box without any need for further programming at a dealership.
Do I need to take my van to a dealer after installation?
No. Because the module arrives pre-programmed to your VIN, you do not need to visit a dealer or a mechanic with a high-end scan tool for programming. It is a plug-and-play installation.
Where is the TCM located on my 2006-2014 Express 2500?
On the Chevrolet Express and GMC Savana vans from this era, the TCM is typically located in the engine compartment on the right-hand (passenger) side. Always disconnect the vehicle’s battery before starting the replacement process.
Will this module 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 (which could be an internal TCM failure), it’s essential to check for other specific codes that P0700 is pointing to. If the other codes are related to solenoid circuits or internal processor faults, this module is the correct solution.
Is there a core charge for this part?
No, there is no core charge required for this transmission control module. You can keep your old part, eliminating the hassle and expense of shipping it back.