If your 2006-2014 Chevrolet Express 1500 work van is experiencing unpredictable shifting, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). A faulty TCM can sideline your vehicle, costing you time and money. This OEM-quality T42 TCM, part number 24235753, is the reliable, direct-fit solution to get your van back in service quickly and affordably.
As a technician with over two decades of experience, I’ve seen countless GM vehicles, especially workhorses like the Express van, come into the shop with frustrating transmission issues. The T42 module is the brain of your automatic transmission, controlling everything from shift points to torque converter lockup. When it fails, the symptoms can be dramatic. This isn’t just a part; it’s a solution that restores the dependable performance your business relies on. We pre-program this module to your van’s specific VIN, so it arrives ready for a true plug-and-play installation, eliminating the need for an expensive and time-consuming trip to the dealership.
Case Study: The Ghost in the Transmission
A local delivery company brought in their 2011 Express 1500, complaining of intermittent ‘limp mode’ that would only happen after an hour of driving on hot days. They had already replaced two shift solenoids at another shop with no success. After hooking up my scan tool and monitoring data streams, I noticed the TCM was commanding erratic line pressure as the under-hood temperature climbed. This is a classic sign of internal electronic failure in the T42 module due to heat cycles. We installed one of our VIN-programmed TCMs, and the van was back on its route the same afternoon, problem-free. This simple swap saved them from a potential, and unnecessary, transmission rebuild.
Is Your Express Van Showing These Warning Signs?
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in a single gear (often 2nd or 3rd) and won’t shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as the general P0700 or specific solenoid codes like P0750, P0751, P0753, etc.
- ✔ A noticeable drop in fuel economy or the transmission seems to be overheating.
- ✔ Complete loss of communication with the transmission module.
Get Your Van Running in Under 30 Minutes
Installation is a straightforward process that most DIYers or any professional mechanic can complete with basic hand tools. For the Express 1500 Van, the TCM is easy to access.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the 2006-2014 Express and Savana vans, the TCM is typically mounted in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs, as they can become brittle over time. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, pre-programmed module into place and securely reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always good practice to use a scan tool to clear any stored DTCs from the vehicle’s memory. Start the vehicle and test drive to confirm smooth shifting.
Verified to Fit These General Motors Vehicles
This T42 TCM is a direct replacement for part number 24235753 and is compatible with a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this page focuses on the 2006-2014 Express 1500 TCM, it also fits:
- Chevrolet: Silverado, Tahoe, Suburban, Avalanche, Cobalt, HHR, Impala, Monte Carlo, Colorado
- GMC: Sierra, Yukon, Savana, Envoy, Canyon
- Buick: LaCrosse, Lucerne, Rainier, Rendezvous
- Pontiac: G5, G6, Grand Prix, Pursuit, Montana
- Cadillac: DTS
- Saturn: Vue, Aura, Ion
- Hummer: H3
- Saab: 9-7X
Frequently Asked Questions
Is this part difficult to install?
No, this is a straightforward installation for someone with basic mechanical skills. For the Express Van, it’s located in the engine bay and can typically be swapped in under 30 minutes with simple hand tools.
Do I need to take my van to the dealer for programming?
Absolutely not. We program the module to your vehicle’s VIN before shipping. This means it’s ready for installation right out of the box, saving you hundreds in dealership fees and programming time.
What is a core charge?
There is no core charge for this part. You can keep your old module without needing to send it back to us, simplifying the process for you.
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 a faulty solenoid driver), you should always diagnose any other specific codes that accompany the P0700 to ensure a complete repair.
What kind of warranty is included?
This module comes with a one-year warranty, giving you peace of mind and confidence in the quality and reliability of your repair.