Get Your Workhorse Back on the Road, Fast.
As a seasoned technician, I know that when a work van like your 2006-2014 Chevrolet Express 2500 goes down, it’s not just an inconvenience—it’s a direct hit to your productivity and income. The transmission is the heart of its capability, and the Transmission Control Module (TCM) is its brain. When that brain falters, you get frustrating, and often debilitating, symptoms like harsh shifting, getting stuck in gear, or a glowing check engine light that won’t go away. This isn’t the time for guesswork or expensive dealership visits.
This T42 Transmission Control Module, part number 24240400, is the definitive solution for restoring your van’s performance. The biggest hurdle with electronic module replacement has always been the need for dealership programming. We eliminate that step entirely. By providing your vehicle’s VIN at checkout, we program the module with the latest GM software before it even ships. This means it arrives at your door ready for a true plug-and-play installation, getting you back to work with minimal downtime. For the professional mechanic, this means a faster bay turnover. For the fleet owner or DIYer, it means a significant cost and time savings.
Case Study: The Limp-Mode Express Van
I remember a call from a local contractor whose 2011 Express 2500 was stuck in limp mode (3rd gear only). His regular shop was quoting a full transmission rebuild, a multi-thousand-dollar job that would sideline his van for a week. He was desperate for a second opinion. After pulling the codes, I saw a classic P0700 (Transmission Control System Malfunction) alongside a few solenoid circuit faults. Experience told me this pattern often points to the TCM itself, not a catastrophic mechanical failure. We swapped in a VIN-programmed T42 module in his parking lot in under 20 minutes. After clearing the codes, the van shifted perfectly. He saved thousands of dollars and, more importantly, was back on the job the same day. That’s the power of a correct diagnosis and a pre-programmed part.
Is Your Van’s Transmission Acting Up?
A failing TCM can manifest in several ways. If you’re experiencing any of these issues, this module is likely the solution you need. Over my 20 years in the bay, I’ve seen these symptoms hundreds of times point directly to a faulty 2006-2014 Express 2500 TCM.
- ✔ Harsh, slamming shifts or erratic gear hunting.
- ✔ The vehicle is stuck in a single gear, often called “limp mode.”
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Check Engine Light or Transmission Warning Light is illuminated with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ Complete loss of communication with the transmission module (no gear indicator display).
- ✔ Poor fuel economy and a feeling of sluggish performance.
A Straightforward Guide to Installation
You don’t need to be a master technician to replace the 2006-2014 Express 2500 TCM. The process is simple and can be done with basic hand tools in your own driveway.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the Express and Savana vans, the TCM is typically found in the engine compartment on the right-hand (passenger) side. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harness connectors. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the wiring harnesses. You should hear a ‘click’ as they lock in.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, use it to clear any stored fault codes. Take the van for a test drive to confirm smooth shifting has been restored.
Verified Vehicle Compatibility
While this part is a direct fit for the 2006-2014 Express 2500 TCM replacement, it is also compatible with a wide range of other General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E. This module is interchangeable with part numbers 24252114, 24234503, 24240400, and more.
Fits Models Including:
- Chevrolet Express / GMC Savana 1500, 2500, 3500 (2006-2014)
- Chevrolet Silverado / GMC Sierra 1500, 2500 (2007-2013)
- Chevrolet Tahoe / GMC Yukon (2007-2009)
- Chevrolet Suburban / GMC Yukon XL 1500 (2007-2008)
- Chevrolet Impala, Cobalt, HHR, Colorado
- Buick LaCrosse, Lucerne
- Cadillac DTS
- Pontiac G6, Grand Prix
- Hummer H3
- And many more…
Frequently Asked Questions
What exactly does ‘VIN Programmed’ mean for me?
It means we flash the module with your specific vehicle’s Vehicle Identification Number (VIN) and the latest GM software before shipping. This ensures it communicates perfectly with your van’s engine computer and other systems right out of the box, eliminating the need for an expensive trip to the dealership for programming.
Is this part difficult to install for a DIYer?
Not at all. For most models like the Express Van, it’s located in an easy-to-access spot in the engine bay. With basic hand tools and our step-by-step guide, most people can complete the swap in under 30 minutes.
Do I need to send my old TCM back (core charge)?
No, there is absolutely no core charge. You can keep your old part or dispose of it at your convenience, making the process hassle-free.
Will this fix my P0700 check engine light code?
If the P0700 code is being caused by an internal failure of the TCM, then yes, this part is the direct solution. P0700 is a general code indicating a fault in the transmission control system, which is very commonly traced back to a failing module.
What kind of warranty comes with this part?
This module is backed by our one-year, hassle-free warranty. We stand by the quality and reliability of our programmed electronics, giving you peace of mind with your purchase.