Is Your Express 3500 Van Shifting Erratically?
If you’re experiencing harsh shifting, delayed gear engagement, or your 2006-2014 Chevrolet Express 3500 is stuck in ‘limp mode,’ a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and ensuring smooth, efficient operation. When it fails, it can cause a cascade of problems that sideline your work van and disrupt your business. Don’t let a faulty module dictate your vehicle’s reliability. This genuine GM T42 TCM, service part number 24252114, is the definitive solution, pre-programmed to your van’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay
We had a 2011 Express 3500 work van from a local plumbing company come into the shop. The driver complained of intermittent, bone-jarring shifts from 1st to 2nd gear and occasionally getting stuck in 3rd gear after a long highway drive. The check engine light was on, and our scan tool pulled a P0700 (Transmission Control System Malfunction) and a P0752 (Shift Solenoid ‘A’ Stuck On). Our first step was to check the fluid and wiring, which were both fine. Based on experience with the 4L80E transmission in these vans, we knew the T42 module was a common point of failure. Instead of a lengthy and expensive diagnostic process at the dealership, the owner opted for one of our VIN-programmed modules. We installed it in under 20 minutes, cleared the codes, and took it for a test drive. The shifting was immediately crisp and smooth, just like it left the factory. The van was back on the road earning money the same afternoon, saving the owner significant downtime and cost.
Symptoms of a Failing 2006-2014 Express 3500 TCM
A failing TCM can manifest in various ways, often starting as a minor annoyance before becoming a major drivability issue. If your Express van is exhibiting any of the following symptoms, it’s time to inspect your transmission module.
- ✔ Harsh, slamming, or erratic gear shifts.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Vehicle is stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ The check engine light or transmission warning light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750-P0758, or other solenoid-related codes are present.
- ✔ Poor fuel economy due to incorrect gear selection.
- ✔ Inability to upshift or downshift properly.
- ✔ Complete loss of transmission function.
The Superior Solution: VIN-Programmed for Your Vehicle
Why choose our T42 TCM? The key is our complimentary VIN programming service. When you order, we flash the module with the latest GM software specific to your Express 3500’s Vehicle Identification Number. This critical step ensures perfect communication between the TCM, the Engine Control Module (ECM), and the transmission itself. It eliminates the need for an expensive trip to the dealership for programming, saving you time and money. Your new module arrives ready for immediate installation, calibrated for optimal shift points, fuel efficiency, and performance right out of the box.
This module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. It interchanges with numerous part numbers, including 24234503, 24230461, 24256960, and more, making it a versatile and reliable fix for your transmission woes.
Easy Installation for a Quick Return to Service
Replacing the TCM on your Express van is a straightforward job that can be completed with basic hand tools. On the 2006-2014 Savana and Express vans, the module is conveniently located in the right-hand (passenger side) engine compartment. Simply disconnect the battery, 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. We recommend using a scan tool to clear any stored DTCs after installation to ensure the system is fully reset. Best of all, there is no core charge, so you can keep your old part without any hassle.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
VIN programming means we load the module with the specific software calibration file from General Motors that matches your vehicle’s unique VIN. This ensures the TCM operates perfectly with your van’s engine, transmission hardware, and other electronic systems for correct shifting, torque converter operation, and diagnostics.
Do I need any special tools to install this TCM?
No special tools are required. Basic hand tools like a socket set and ratchet are typically all that’s needed. The installation process usually takes less than 30 minutes. Always remember to disconnect the negative battery terminal before starting any electrical work.
Is this compatible with other GM trucks and SUVs?
Yes, this T42 TCM is compatible with a vast range of 2006-2014 GM vehicles, including the Chevrolet Silverado, Tahoe, Suburban, GMC Sierra, Yukon, and many others that use a 4-speed automatic transmission. We program it specifically for the vehicle you order it for.
What happens if I continue driving with a bad TCM?
Continuing to drive with a faulty TCM can lead to more severe and costly damage. Poor shifting can cause excessive wear on internal transmission components like clutches and bands, leading to a complete transmission failure that requires a full rebuild or replacement.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, faulty module back to us, which simplifies the repair process for you.