Get Your Work Van Back on the Road with a Reliable, Programmed TCM
If your 2006-2014 Chevrolet Express 2500 Van is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, the problem is often a failed Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can sideline a crucial work vehicle. This T42 series TCM, part number 24243921, is the definitive solution. It arrives expertly programmed to your van’s specific VIN, eliminating the need for expensive dealership visits and getting you back to work faster. This isn’t just a part; it’s a reliable fix that restores the smooth, predictable performance your 4L80E or 4L60E transmission was designed for.
A Technician’s Notebook: The Misleading Solenoid Code
A customer brought in an ’08 Express 2500 cargo van that was stuck in third gear—classic limp mode. The scanner showed a code for a failed shift solenoid ‘B’. The owner had already replaced the solenoid himself, but the problem persisted. This is a common scenario I’ve diagnosed hundreds of times. While the code points to the solenoid, the root cause is often the TCM itself failing to properly command it. The internal drivers on the circuit board weaken over time due to heat and vibration. We installed one of our pre-programmed T42 modules, cleared the codes, and the van was shifting perfectly in under 30 minutes. The customer saved hundreds by avoiding a misdiagnosis and unnecessary internal transmission work.
Is Your Express Van Showing These Transmission Faults?
- âś” Harsh, banging shifts or delayed gear engagement.
- âś” The vehicle is stuck in “limp mode” (usually 2nd or 3rd gear) to protect the transmission.
- âś” Check Engine Light or Transmission Warning Light is illuminated on the dash.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as the general code P0700 or specific solenoid codes like P0751, P0756, etc.
- âś” Sudden loss of communication with the transmission module.
- âś” Poor fuel economy and a feeling of sluggish performance.
Your Direct-Fit Solution: The 2006-2014 Express 2500 TCM
This module is engineered to meet or exceed original equipment standards for durability and performance. By managing everything from shift points to torque converter clutch lockup, it ensures your transmission operates at peak efficiency. The most significant benefit is our complimentary VIN programming service. We load the latest GM software calibrated specifically for your van before the part even ships. This makes the replacement process as simple as swapping the part, saving you significant time and money compared to buying a blank module that requires dealership tools.
Get Your Van Back to Work: Fast Installation Guide
- âś” Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- âś” Locate the Module: On the 2006-2014 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. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- âś” Install the New TCM: Mount the new module securely onto the bracket and reconnect the electrical harnesses. Ensure they click into place.
- âś” Reconnect and Verify: Reconnect the battery terminal. Start the vehicle and check for any warning lights. A quick test drive will confirm that shifting has returned to normal.
Verified Compatibility for Your GM Vehicle
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions. While this page focuses on the Express Van, it is also the correct part for models like the Chevrolet Silverado, Tahoe, Impala; GMC Sierra, Yukon, Savana; Cadillac DTS, and many more from 2006-2014. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24240400, and 24243921. Please verify your specific model in the fitment list below or contact our expert team for confirmation.
Frequently Asked Questions
Do I need to get this TCM programmed by a dealer?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for plug-and-play installation, with no additional programming required.
Is this a difficult part for a DIYer to install?
Not at all. For most vehicles, including the Express Van, this is a very straightforward job requiring basic hand tools. It’s typically located in an accessible spot in the engine bay and takes less than 30 minutes to replace.
What is the warranty on this module?
This transmission control module is backed by our comprehensive one-year warranty, giving you peace of mind.
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 often resolves the root cause (like an internal TCM failure that triggers other codes), you should always diagnose any other codes that are present. In many cases, replacing a faulty TCM will clear the P0700 and related codes.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part, saving you the time and expense of shipping it back.