Get Your Work Van Back on the Road, Fast
If your 2006-2014 Chevrolet Express 2500 Van is suffering from transmission problems like harsh shifting, getting stuck in gear, or a lit check engine light, a failing Transmission Control Module (TCM) is the likely culprit. As a mechanic with over two decades of experience, I’ve seen countless work vans sidelined by this exact issue. A faulty TCM doesn’t just make driving unpleasant; it costs you time and money. This T42 TCM, part number 24240400, is the direct, reliable solution to restore your van’s performance and dependability.
The biggest headache with replacing electronic modules is the need for expensive dealership programming. We eliminate that step entirely. By providing your van’s VIN during checkout, we program the module specifically for your vehicle. It arrives at your door ready for a true plug-and-play installation, loaded with the latest GM software updates. This ensures perfect communication between the engine and transmission, restoring the smooth, predictable shifting you rely on.
Case Study: A Tricky Diagnosis
A local contractor brought in his 2011 Express 2500, complaining of intermittent ‘no-shift’ conditions and a P0700 code that kept coming back. He’d already replaced two shift solenoids, but the problem persisted. After a quick data scan, I saw erratic command signals from the TCM. These modules, especially on hardworking vans, are exposed to constant heat cycles that can fry internal circuits over time. We installed one of our pre-programmed T42 modules. In less than an hour, the van was shifting perfectly, the code was gone for good, and the contractor was back on the job. It’s a classic case where chasing symptoms costs more than fixing the root cause.
Your Direct Solution for a 2006-2014 Express 2500 TCM Failure
This isn’t just a replacement part; it’s a comprehensive fix. Designed to meet or exceed original equipment specifications, this module directly addresses the common failure points of the factory T42 TCM. It restores precise control over shift points, torque converter lockup, and line pressure, which not only improves drivability but can also enhance fuel efficiency and reduce wear on your transmission’s mechanical components.
Is Your Express Van Exhibiting These Transmission Issues?
- âś” Harsh, banging shifts or delayed gear engagement.
- âś” Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- âś” Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, or other solenoid circuit faults.
- âś” The transmission refuses to upshift or downshift properly.
- âś” A noticeable drop in fuel economy or signs of the transmission overheating.
- âś” Complete loss of communication with the TCM (no-start or no-shift condition).
A Straightforward Installation Guide for Your Express Van
- âś” Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting work.
- âś” Locate the TCM: On the Express 2500 Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- âś” Disconnect and Remove: Carefully unplug the electrical connectors. Use a socket wrench to remove the bolts or nuts holding the old module in place.
- âś” Install the New Module: Mount your new, pre-programmed TCM and securely fasten it. Reconnect the electrical connectors, ensuring they click into place.
- âś” Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic scan tool to clear any stored fault codes from the system’s memory.
Verified Compatibility for Your GM Vehicle
This T42 TCM, also known by service numbers 24252114, 24234503, and 24242391, is a direct fit for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. While this page focuses on the 2006-2014 Express 2500 TCM, it is also compatible with many other models including:
- Chevrolet Silverado, Tahoe, Suburban, Colorado, Impala, Cobalt, HHR
- GMC Sierra, Yukon, Savana, Canyon
- Buick LaCrosse, Lucerne, Allure
- Cadillac DTS
- Pontiac G6, Grand Prix
- Hummer H3
- And many more. Please verify your part number (interchangeable with 24240400, 24239224, etc.) or contact us with your VIN to confirm fitment.
Does this module really not require a trip to the dealer?
Does this module really not require a trip to the dealer?
That’s correct. We handle all the programming here before we ship it. By providing your VIN, you receive a module that is 100% ready to install in your 2006-2014 Express 2500 Van without any additional programming or calibration.
Is this a difficult part for a DIYer to install?
Not at all. For most people with basic hand tools, this is a job that takes less than 30 minutes. The module is easily accessible in the engine bay, making it one of the simpler electronic component replacements you can do.
What is the warranty on this part?
This Transmission Control Module comes with a one-year warranty, giving you peace of mind that you’re installing a quality, dependable part in your vehicle.
Do I need to send my old TCM back?
No, there is no core charge for this module. You can keep your old part, which saves you the time and hassle of return shipping.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a failing TCM is the source of the code. Replacing the module with our programmed unit is a very common and effective fix for this and related transmission codes.