Restore Peak Transmission Performance to Your 2006-2014 Chevrolet Express 3500
Is your Chevrolet Express 3500 van suffering from erratic shifting, delayed gear engagement, or a persistent 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, managing torque converter lockup, and monitoring system health. When it fails, it can cripple your vehicle’s performance, reliability, and fuel economy, taking your workhorse off the road. This OEM-quality T42 TCM, service part number 24241806, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play installation.
From the Diagnostic Bay
We recently had a 2011 Savana 3500 (the Express’s GMC twin) towed in. The owner was frustrated because it was stuck in third gear—limp mode—and another shop had already replaced two shift solenoids without success. The P0700 and P0756 codes kept returning. Instead of just throwing more parts at it, we hooked up our scanner and monitored the TCM’s command data. We saw the commands being sent to the solenoids were erratic and inconsistent. The issue wasn’t the solenoids; it was the module giving the orders. We installed one of these VIN-programmed T42 modules, cleared the codes, and the van was shifting perfectly within 30 minutes. It’s a textbook case of how diagnosing the root cause saves time and money.
Is Your Van Showing Signs of a Failing TCM?
- ✔️ Harsh, slamming, or unpredictable gear shifts.
- ✔️ The vehicle gets stuck in one gear (often called “limp mode”) and won’t shift up or down.
- ✔️ An illuminated Check Engine Light or Transmission Warning Light on your dashboard.
- ✔️ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0751, or other solenoid-related faults.
- ✔️ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔️ A noticeable decrease in fuel efficiency and potential transmission overheating.
The Direct-Fit Solution: Your Programmed 2006-2014 Express 3500 TCM
Don’t settle for a generic module that requires an expensive trip to the dealership for programming. This T42 TCM is meticulously prepared for your specific vehicle. When you provide your VIN during checkout, we flash the module with the latest GM software updates tailored to your Express 3500. This critical step ensures that all shift points, pressure controls, and electronic communications are perfectly calibrated, resolving common issues right out of the box. Built to strict OEM standards, this module guarantees the durability and reliability your hard-working van demands.
Simple, Hassle-Free Installation
Replacing the TCM on your Express 3500 is a straightforward job that can be completed with basic hand tools. For most 2006-2014 Savana and Express vans, the module is located in the engine compartment on the right-hand (passenger) side. Simply disconnect the negative battery terminal, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Reconnect everything, and you’re ready to go. Once installed, use a standard OBD2 scanner to clear any stored transmission codes. Best of all, there is no core charge, so you don’t have to worry about the cost or hassle of returning your old part.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24230461, 24241806, and 24256960, among others. Whether you’re repairing a Chevrolet Silverado, GMC Sierra, Tahoe, or any of the other vehicles listed in the fitment guide, this part ensures a perfect match and restored function.
Frequently Asked Questions
What is VIN programming and why do I need it?
VIN programming loads your vehicle’s specific software and calibrations onto the TCM. Without it, the module won’t communicate correctly with your engine and other systems, leading to poor performance or a no-start condition. Our pre-programming service makes this a plug-and-play part, saving you a trip to the dealer.
Do I need to return my old TCM?
No. We do not require you to send back your old part. There is no core charge associated with this purchase, making the process simpler and more convenient for you.
Is this installation difficult for a DIY mechanic?
Not at all. For most models, the TCM is easily accessible in the engine bay. The process involves disconnecting the battery, unplugging a few connectors, and removing a few bolts. It typically takes less than 30 minutes with basic tools.
Will this module fix my specific transmission code (e.g., P0751)?
This module is the most common solution for a wide range of transmission-related DTCs, especially those pointing to solenoid circuits or general communication errors (like P0700). While it resolves the vast majority of these issues, proper vehicle diagnosis is always recommended to rule out wiring or internal transmission problems.
Where do I provide my VIN for programming?
You will be prompted to enter your vehicle’s 17-digit VIN during the checkout process. Please double-check it for accuracy to ensure correct programming.