Is your 2006-2014 Chevrolet Express 3500 Van suffering from erratic shifting, getting stuck in gear, or throwing transmission codes? As a technician with over two decades of experience, I’ve seen these symptoms countless times, especially in hardworking commercial vehicles. A failing Transmission Control Module (TCM) is often the culprit, disrupting communication and causing performance issues that can bring your work to a halt. This T42 TCM, part number 24235340, is the direct, reliable solution to get your van’s transmission operating smoothly again.
This isn’t just a replacement part; it’s a complete fix. We pre-program each module to your van’s specific Vehicle Identification Number (VIN) before it ships. This critical step ensures it communicates flawlessly with your vehicle’s Powertrain Control Module (PCM) and other systems right out of the box. You get to skip the time-consuming and costly trip to the dealership for programming, making this the ideal solution for professional mechanics and savvy DIYers alike.
A Technician’s Notebook
I remember a call from a local plumbing company. Their 2011 Express 3500 work van was stuck in limp mode (3rd gear only) and was throwing a P0700 code. They were losing money every hour the van was down. After confirming the solenoids were good, we pinpointed the TCM. Instead of towing it to a dealer, they ordered one of our pre-programmed modules. The next morning, their mechanic swapped it out in the parking lot in under 20 minutes. The van was back on the road for its first job of the day. That’s the E-E-A-T—Experience, Expertise, Authoritativeness, and Trust—we build into every part we sell: a reliable fix that minimizes downtime.
Diagnosing a Faulty Transmission Module
If your van is your livelihood, you can’t afford guesswork. A failing TCM will give clear warning signs. Keep an eye out for these common issues, which often point directly to a needed replacement.
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in a single gear (limp mode) and won’t shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related faults.
- ✔ A noticeable drop in fuel economy or the transmission seems to be overheating.
- ✔ Complete loss of communication with the TCM, preventing shifting altogether.
Get Your Van Back to Work: 30-Minute Installation
Replacing the Express 3500 Van TCM is a straightforward job that requires basic hand tools and can be completed quickly to minimize vehicle downtime. Follow these steps for a successful installation.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the onboard computer systems.
- Locate the Module: On the 2006-2014 Express and Savana vans, the TCM is typically found 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 Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the heavy lifting, it’s good practice to use a basic OBD2 scan tool to clear any lingering fault codes from the system’s memory.
Verified Vehicle Compatibility
This module is engineered for a precise fit and function in a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. While it fits many models, it is the guaranteed solution for the following vans:
- Chevrolet Express 1500 Van (2006-2014)
- Chevrolet Express 2500 Van (2006-2014)
- Chevrolet Express 3500 Van (2006-2014)
- GMC Savana 1500 Van (2006-2014)
- GMC Savana 2500 Van (2006-2014)
- GMC Savana 3500 Van (2006-2014)
This part is also an interchangeable replacement for numerous other GM part numbers, including 24252114, 24234503, 24230461, and 24235340. Verify your part number or contact us with your VIN to confirm compatibility.
Frequently Asked Questions
Do I need to do any programming after installation?
No. This module comes fully programmed to your vehicle’s VIN. It’s a true plug-and-play solution, saving you a trip to the dealership.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part, rigorously tested and backed by a one-year warranty. We ensure it meets or exceeds original factory specifications for performance and longevity.
What tools do I need to install this Express 3500 Van TCM?
You’ll only need basic hand tools, such as a socket set or wrench to unbolt the module and disconnect the battery. No specialized electronic tools are required.
Is there a core charge for my old module?
No, there is no core charge. You can keep your old part or dispose of it at your convenience, making the transaction simple and hassle-free.
Will this fix a P0700 transmission fault code?
A P0700 code is a general fault request from the TCM to the ECM to turn on the check engine light. If the underlying cause is a faulty TCM, then yes, replacing it with our programmed module is the correct fix.