Stop Transmission Headaches and Get Your Van Back to Work
If you’re a contractor, delivery driver, or anyone who relies on a 2006-2014 Chevrolet Express 2500 Van, you know that vehicle downtime is lost money. When your transmission starts acting up—slamming into gear, refusing to shift, or putting the van into limp mode—it’s more than an annoyance; it’s a major problem. Often, the root cause isn’t the costly mechanical parts of the transmission itself, but its electronic brain: the Transmission Control Module (TCM). This T42 TCM, part number 24252114, is the definitive solution, arriving at your door pre-programmed to your van’s specific VIN for a true plug-and-play repair.
Case Study: A Tricky Diagnosis
I had a 2009 Express 2500 work van come into my shop last month. The owner was frustrated because he’d already been to two other shops. The van had intermittent, violent 1-2 shifts and would occasionally get stuck in 3rd gear (limp mode), but only after it was fully warmed up. The other shops couldn’t find a consistent fault code, aside from a generic P0700 (Transmission Control System Malfunction). They quoted him for a full transmission rebuild. From experience, I know these T42 TCMs can fail from heat cycles over the years, causing these exact ghost-in-the-machine issues. We installed one of our VIN-programmed modules, and the problem was solved instantly. The van was back on the road making money the same afternoon for a fraction of the cost of a rebuild.
Is Your Express Van Showing These Red Flags?
A failing TCM can mimic a major mechanical failure. Before you condemn your transmission, check if you’re experiencing any of these common symptoms. A new Express 2500 Transmission Module is often the fix.
- ✔ Harsh, erratic, or delayed gear shifts that make driving unpredictable.
- ✔ The vehicle is stuck in a single gear, commonly known as “limp mode,” to protect the transmission.
- ✔ Your check engine light or transmission warning light is on, with Diagnostic Trouble Codes (DTCs) like P0700, P0750-P0758 (Solenoid Faults), or other communication errors.
- ✔ A sudden drop in fuel economy as the transmission isn’t shifting at the optimal points.
- ✔ The transmission seems to slip out of gear or fails to engage when you shift from park to drive or reverse.
DIY Installation Guide: Get Your Van Running in 30 Minutes
One of the best features of this part is how simple the installation is. You don’t need a lift or specialized transmission tools. For the Express and Savana vans, the process is incredibly straightforward.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the TCM: On your Express 2500 Van, the TCM is typically mounted in the engine compartment on the right-hand (passenger) side. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs, so be gentle. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place. Securely plug in the wiring harnesses until they click, ensuring a solid connection.
- Reconnect and Verify: Reconnect the negative battery terminal. Start the vehicle and let it idle for a moment. Use a basic OBD2 scanner to clear any stored fault codes. Test drive to confirm smooth shifting has been restored.
Verified Fitment for Your GM Vehicle
While this is the perfect solution for your Express 2500 Transmission Module replacement, this versatile T42 module is compatible with a wide array of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E. Please verify your specific model and year below. This part is a direct replacement for service numbers including 24252114, 24234503, 24242391, and many more.
This part will fit these makes and models with these options
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)
EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
And many other GM cars, trucks, and SUVs as listed in the full compatibility chart.
Frequently Asked Questions
What does “VIN Programmed” mean?
It means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) onto the module before we ship it. This ensures the TCM has the correct software and calibration for your van’s specific engine, transmission, and options, allowing it to work perfectly right out of the box without a trip to the dealership for expensive programming.
Do I need to return my old TCM (core charge)?
No, there is no core charge for this part. You can keep your old module or dispose of it yourself, saving you the time and hassle of a return shipment.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module replacement often resolves the underlying issue that triggers a P0700 (like a faulty solenoid driver), you should ensure there are no wiring or mechanical issues first. In a vast majority of cases I’ve seen, a faulty TCM is the culprit.
Is this part difficult to install myself?
Not at all. For a Chevy Express van, it’s one of the easier electronic component replacements. It’s located in an accessible spot in the engine bay and requires only basic hand tools. The entire job can typically be completed in under 30 minutes.
What is the warranty on this module?
This transmission control module comes with a one-year warranty, giving you peace of mind that you’re installing a quality, reliable part built to OEM standards.