Get Your Workhorse Van Back on the Road with a Reliable Transmission Fix
If your 2006-2014 Chevrolet Express 2500 Van is experiencing erratic shifting, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As the electronic brain of your 4L80E or 4L60E transmission, a faulty T42 TCM can bring your work to a grinding halt. This replacement module, part number 24241806, is the definitive solution to restore the crisp, predictable shifting your van had from the factory. We pre-program it to your van’s specific VIN, eliminating the need for expensive dealership visits and ensuring it works perfectly right out of the box.
From the Diagnostic Bay: The Misleading Solenoid Code
A customer brought in his 2011 Express 2500, a plumber’s van, complaining of harsh 1-2 shifts and a P0751 code for Shift Solenoid ‘A’ Stuck Off. He had already replaced the solenoid himself, but the problem persisted. In my 20+ years of experience, I’ve seen this exact scenario dozens of times. While the code points to a solenoid, the root cause is often the TCM’s driver circuit failing. The module can no longer properly command the solenoid, but the diagnostic system reports the symptom, not the cause. We installed one of our VIN-programmed T42 TCMs, and the van was shifting perfectly in under 30 minutes. The P0751 code was gone for good, saving the customer from a costly and unnecessary internal transmission repair.
Is Your Express Van Showing These Transmission Red Flags?
- âś” Harsh, banging shifts or delayed gear engagement, especially when cold.
- âś” The vehicle feels stuck in one gear (often 2nd or 3rd), a condition known as “limp mode.”
- âś” An illuminated Check Engine Light or Transmission Warning Light on the dash.
- âś” Diagnostic Trouble Codes (DTCs) stored in the system, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (solenoid circuit faults), or U0101 (Lost Communication with TCM).
- âś” A noticeable drop in fuel economy or the transmission seeming to overheat.
- âś” Complete loss of communication with the module, preventing shifting altogether.
Get Your Van Back to Work: Quick Installation Guide
For the Chevrolet Express and GMC Savana vans, this is one of the more straightforward electronic repairs you can do. The entire process typically takes less than half an hour, getting you back on the job fast.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the TCM: On 2006-2014 Express and Savana vans, the TCM is conveniently located in the engine compartment on the right-hand (passenger) side, mounted to the firewall or inner fender.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Press the release tabs firmly to avoid breaking them. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place. Securely plug in the electrical connectors until they click, ensuring a solid connection.
- Final Steps: Reconnect the negative battery terminal. While the battery disconnect often clears codes, it’s best practice to use a basic OBD2 scan tool to confirm all DTCs are cleared. Start the vehicle and test drive to confirm smooth shifting.
Verified Compatibility for Your GM Vehicle
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions. While this page focuses on the 2006-2014 Express 2500 Van TCM, it is also compatible with the following models. Please verify the location noted for your specific vehicle.
Interchangeable Part Numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24252114, 24255280, 24256960, 24235732, 24235753, 24240449, YNXS.
Frequently Asked Questions
Do I need to take my van to a dealer for programming after installation?
No. This is the biggest benefit of our service. We program the module to your van’s VIN before we ship it. This makes the installation a true plug-and-play process, saving you the time, hassle, and high cost of dealership programming.
What if my van has other transmission codes besides the common ones?
Our VIN-specific programming, which includes the latest GM software updates, often resolves a wide array of transmission-related DTCs. If you have codes, this module is the correct first step in the diagnostic process after checking wiring and connections.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part, fully tested and validated to meet or exceed original specifications. It comes with a one-year warranty for your peace of mind.
How do I provide my VIN for programming?
You will be prompted to enter your vehicle’s 17-digit VIN during the checkout process. Please double-check it for accuracy to ensure perfect compatibility.
Is there a core charge for my old TCM?
No, there is no core charge. You can keep your old part or dispose of it at your convenience without the hassle of returning it.