Get Your Work Van Back on the Road with a Reliable, Programmed TCM
As a technician with over two decades of experience, I know that for an Express 3500 Van owner, downtime isn’t just an inconvenience—it’s lost business. When your transmission starts acting up, with harsh shifts, delayed engagement, or getting stuck in limp mode, the problem is often an electronic one. The Transmission Control Module (TCM) is the brain of your automatic transmission, and when it fails, it can bring your entire operation to a standstill. This T42 TCM, part number 24234503, is the definitive solution for your 2006-2014 GM workhorse.
What sets this module apart is our expert VIN programming service. Before this part ever ships, we flash it with your van’s specific Vehicle Identification Number and the latest GM software. This means it arrives ready for a true plug-and-play installation, eliminating the need for an expensive trip to the dealership for programming. You get a reliable, OEM-spec part that restores crisp, predictable shifting and clears those frustrating transmission codes for good.
Case Study: The Ghost in the Transmission
A local contractor brought in his 2011 Express 3500, complaining of intermittent, violent shifts and occasionally getting stuck in 3rd gear, but only after the van had been running for over an hour on hot days. He’d already replaced two shift solenoids with no luck. After scanning, we found a generic P0700 code. From experience, I knew that heat soak is a classic killer of these T42 modules. The internal circuit boards develop micro-fractures that only cause issues when they expand with heat. We swapped in a VIN-programmed 2006-2014 Express 3500 TCM, and the problem was solved instantly. It’s a textbook example of how replacing the right electronic component saves time and money on unnecessary hard-part repairs.
Is Your Express Van Showing These Symptoms?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution. Over the years, I’ve seen these symptoms hundreds of times, often tied directly to a faulty TCM.
- ✔ Harsh, banging shifts or erratic gear hunting.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear) with no upshifting or downshifting.
- ✔ Check Engine Light or 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 transmission-related faults.
- ✔ Delayed or no gear engagement when shifting from Park to Drive or Reverse.
- ✔ Poor fuel economy and a feeling of sluggish performance.
A Straightforward Guide to Installation
For the professional mechanic or the savvy DIYer, installing this 2006-2014 Express 3500 TCM is a simple job that typically takes less than 30 minutes. Since it comes pre-programmed, no special scan tools are needed for setup.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the Module: On the Express and Savana vans, the TCM is conveniently located in the engine compartment on the right-hand (passenger) side. You can’t miss it.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly to avoid damaging the clips. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, programmed TCM into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Reconnect and Verify: Reconnect the battery terminal. Start the vehicle and allow it to idle for a moment. The check engine light should be off, and a test drive should confirm smooth shifting has been restored.
Verified Vehicle Compatibility
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, 4L70E, and 4L80E. While this page focuses on the 2006-2014 Express 3500 TCM, it is also compatible with the following models. Always verify by part number (24234503, 24252114, 24242391, etc.) for a perfect match.
This part will fit these makes and models with these options:
EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 1500 VAN 06-14 Transmission; (RH engine compartment)
SILVERADO 1500 PICKUP 07-13 (various configurations)
TAHOE 07-09 (various configurations)
…and many more GM cars, trucks, and SUVs.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation, with no additional programming or setup required.
What is the warranty on this TCM?
This module is backed by our comprehensive one-year warranty, giving you peace of mind and protection against defects.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or recycle it locally without the hassle of shipping it back to us.
Will this fix a P0700 trouble code?
In many cases, yes. The P0700 code is a general fault request from the TCM to the Engine Control Module (ECM). If the TCM itself is the source of the fault (which is very common), replacing it with this programmed unit will resolve the code and the underlying issue.
Where is the TCM located on my 2009 Express Van?
On the 2006-2014 Chevrolet Express and GMC Savana vans, the Transmission Control Module is located on the right (passenger) side of the engine compartment, making it easily accessible for replacement.