Get Your Workhorse Back on the Road: A Reliable Fix for Your Express Van’s Transmission
If your 2006-2014 Chevrolet Express 1500 Van is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, your Transmission Control Module (TCM) is the likely culprit. As the brain of your automatic transmission, a failing T42 module can bring your work to a grinding halt. This replacement TCM, part number 24235754, is the definitive solution, arriving pre-programmed to your van’s specific VIN. This means no expensive trips to the dealership for programming—it’s a true plug-and-play fix that restores the smooth, reliable performance you depend on.
A Technician’s Notebook: The Case of the Slipping Work Van
I had a 2011 Express 1500 come into the bay last month. The owner, a plumber, said it was shifting so hard it felt like he was being rear-ended, and sometimes it wouldn’t shift out of 2nd gear. He was losing money every day it was down. His scanner showed a generic P0700 code. While this can point to many things, experience with these 4L60E transmissions immediately made me suspect the TCM. Heat cycles and vibrations, especially in a hardworking van, cause internal solder joints to fail over time. We installed one of our VIN-programmed modules, and in less than 30 minutes, the van was shifting perfectly. He avoided a costly diagnostic rabbit hole and got back to his customers the same day. That’s the value of a pre-programmed, reliable part.
Is Your Express Van Showing These Telltale Signs?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Unpredictable, harsh, or delayed gear shifts.
- ✔ The vehicle enters “limp mode,” often stuck in a single gear (usually 2nd or 3rd).
- ✔ The Check Engine Light or a transmission warning light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid errors), or other communication codes.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Complete failure to shift gears, either up or down.
DIY Installation: Get Your Van Back to Work
Installing your new Express 1500 Van TCM is a straightforward job that you can do right in your driveway. For the Express Van, the module is conveniently located and easy to access.
- Safety First: Begin by disconnecting the negative terminal from your vehicle’s battery. This prevents any electrical shorts and helps reset the vehicle’s computer systems.
- Locate the Module: On the 2006-2014 Express Van, the TCM is typically mounted in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount your new, pre-programmed module in place and securely fasten the bolts. Reconnect the electrical connectors, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the system. Start the vehicle and test drive to confirm smooth shifting.
Verified Compatibility for GM Vehicles
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this page focuses on the Express Van, it also fits:
- ✔ Chevrolet: Silverado, Tahoe, Suburban, Avalanche, Impala, Cobalt, HHR
- ✔ GMC: Sierra, Yukon, Savana, Envoy, Canyon
- ✔ Cadillac: DTS
- ✔ Buick: LaCrosse, Lucerne, Rainier
- ✔ Pontiac: G6, Grand Prix
- ✔ And many more models from Saturn, Hummer, and Saab.
It interchanges with part numbers including: 24235754, 24252114, 24234503, 24230461, 24234274, 24235340, and others.
Frequently Asked Questions
What does “VIN Programmed” actually mean?
It means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM software onto the module before shipping. This ensures it communicates perfectly with your van’s engine computer and other systems, just like the original part, without needing a trip to the dealer.
Do I have to send my old part back?
No. There is no core charge or need to return your old module. You can dispose of it at your convenience, making the repair process simpler and faster.
Is this a brand new part?
This is a high-quality, OEM-spec component that has been thoroughly inspected and prepared to meet or exceed original factory standards. It is backed by our one-year warranty for your peace of mind.
Will this fix a P0700 code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (like a failed internal driver that triggers solenoid codes), you should always confirm the diagnosis. If the TCM itself is faulty, this part is the correct fix.
Can I install this myself if I have basic tools?
Absolutely. The installation process requires only basic hand tools (like a socket set) and typically takes less than 30 minutes. Our step-by-step guide above walks you through the process for your Express Van.