Get Your Workhorse Van Back on the Road
If your 2006-2014 Chevrolet Express 3500 Van is suffering from unpredictable shifting, getting stuck in gear, or throwing transmission codes, the problem often points directly to a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty T42 TCM can cripple your van’s performance and reliability. This replacement module, part number 24235753, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay: The Intermittent Gremlin
I once had a local delivery company bring in their Express 3500 with a complaint that stumped their regular mechanic. The van would occasionally slam into gear or refuse to shift out of 2nd, but only after it was fully warmed up on long routes. There were no consistent codes, just a generic P0700 now and then. After checking the wiring and solenoids, which all tested fine, we focused on the TCM. Heat soak was causing an internal failure in the module’s logic board. Swapping in a VIN-programmed 2006-2014 Express 3500 TCM didn’t just fix the problem—it restored the driver’s confidence and got their van back to making money without any further downtime. These modules are the unsung heroes of the GM 4-speed automatics.
Is Your Express Van Showing These Red Flags?
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle is stuck in “limp mode,” often in 2nd or 3rd gear, with limited power.
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ Inability to upshift or downshift, leading to poor acceleration and terrible fuel economy.
- ✔ The transmission feels like it’s slipping between gears.
- ✔ Complete loss of communication with the transmission module, preventing diagnostics.
Get Your Van Back to Work: 30-Minute Installation Guide
Replacing the TCM on your Express Van is a straightforward job that most DIYers or any professional can complete quickly in the shop or driveway. No specialized dealer tools are required.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Module: On the Chevrolet Express and GMC Savana vans, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Remove the Old TCM: Carefully unplug the electrical connectors. Use a socket wrench to remove the bolts holding the module to its bracket.
- Install the New Module: Mount your new, VIN-programmed TCM and securely reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s best practice to use a standard OBD2 scan tool to clear any lingering fault codes from the ECU. Start the vehicle and test drive to confirm smooth shifting.
Verified Fitment for Your General Motors Vehicle
This T42 TCM is a direct-fit replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E. While this page focuses on the 2006-2014 Express 3500 TCM, it is also compatible with the following models. Always verify by part number or contact us with your VIN.
This part will fit these makes and models with these options
EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
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)
SIERRA 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SILVERADO 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SIERRA 1500 PICKUP 08-13 Transmission; (next to battery), w/o hybrid option
SILVERADO 1500 PICKUP 08-13 Transmission; (next to battery), w/o hybrid option
TAHOE 07-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
YUKON 07-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
SUBURBAN 1500 07-08 Transmission; (next to battery)
YUKON XL 1500 07-08 Transmission; (next to battery)
AVALANCHE 1500 07-08 Transmission; (next to battery)
… and many more GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means this module is a true plug-and-play solution. We flash it with your vehicle’s specific VIN and the latest GM software before shipping. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money.
Will this fix a P0700 transmission fault code?
A P0700 code is a general fault request from the TCM to the main engine computer. While this module often resolves the root cause (like a faulty solenoid circuit inside the TCM), you should ensure the transmission’s wiring and solenoids are in good condition. In most cases where the TCM is the culprit, this part is the fix.
Where is the TCM on my 2011 Express 3500 Van?
For the 2006-2014 Express and Savana van series, the Transmission Control Module is consistently located in the engine bay on the passenger side (RH side). It’s typically mounted with a few bolts and is easy to access.
Do I need to send my old part back?
No. This part is sold without a core charge. You can keep your old module or dispose of it responsibly without the hassle of return shipping.
Is a warranty included with this part?
Yes, this module is backed by our one-year warranty, giving you peace of mind that you’re installing a reliable, quality-tested component in your vehicle.