If your 2006-2014 Chevrolet Express 1500 Van is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, you’re not just inconvenienced—you’re losing time and money. As a technician with over two decades of experience, I know that a reliable work van is non-negotiable. The culprit is often a failing Transmission Control Module (TCM), the electronic brain of your automatic transmission. This T42 TCM, part number 24235732, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay
I recently had a local contractor bring in his 2011 Express 1500. The van would intermittently refuse to shift out of 2nd gear, especially on hot days after multiple stops. His scanner showed a generic P0700 code and a specific solenoid circuit code that would come and go. He was worried he needed a full transmission rebuild, a costly and time-consuming job. We diagnosed a faulty TCM. Instead of a multi-thousand-dollar repair, we installed one of these VIN-programmed T42 modules. The entire job took less than an hour, and his van was back on the road, shifting perfectly. This isn’t just a part; it’s a smart, cost-effective repair that prevents misdiagnosis and gets you back to work.
Is Your Express Van Showing These Red Flags?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid errors), or other transmission-related faults.
- ✔ Poor fuel economy and a feeling of sluggish performance.
- ✔ Complete loss of communication with the TCM, leading to a no-shift condition.
A Straightforward Guide to Installation
One of the best features of this module is its simple installation. Because it comes programmed, you avoid a trip to the dealer. For your 2006-2014 Express 1500 TCM, the module is located in the engine compartment on the right-hand (passenger) side. The job should take less than 30 minutes.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Old TCM: Find the module on the RH side of the engine bay. It will have several large electrical connectors attached.
- Remove Connectors: Carefully unclip and remove the wiring harness connectors from the old module.
- Unbolt and Replace: Unbolt the old TCM from its mounting bracket. Mount the new module in its place and securely re-fasten it.
- Reconnect Everything: Plug the wiring harnesses firmly into the new TCM and reconnect the negative battery terminal.
- Final Steps: Start the vehicle. While the module is plug-and-play, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the ECU.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24235732 and other service numbers. While this page focuses on the Express Van, it is also compatible with a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. Please verify your part number or contact us for fitment confirmation.
Fits Models Including:
- Chevrolet Express 1500/2500/3500 Van (2006-2014) – RH engine compartment
- Chevrolet Silverado & GMC Sierra (2007-2013) – Next to battery
- Chevrolet Tahoe & GMC Yukon (2007-2009) – Next to battery
- Chevrolet Impala (2006-2011) – Lower air cleaner housing
- And many more Buick, Cadillac, Pontiac, Saturn, Hummer, and Saab models.
Frequently Asked Questions
Do I need to take my van to the dealer for programming?
No. This is the biggest benefit. We program the module to your van’s VIN before shipping it. It arrives ready for installation, saving you the time, cost, and hassle of a dealership visit.
Is this a difficult part for a DIYer to install?
Not at all. If you can disconnect a battery and use a basic wrench, you can replace this module. For the Express Van, it’s easily accessible in the engine bay, making it a perfect job for a DIY enthusiast.
What if my original part number is slightly different?
This T42 module replaces many different GM service numbers, including 24242391, 24234503, and 24252114. As long as your vehicle is on the compatibility list, this module will function correctly once programmed to your VIN.
Is there a core charge?
No, there is no core charge. You are not required to send your old, faulty module back to us, which simplifies the process for you.
Will this fix a P0700 code on my Express Van?
A P0700 code is a general fault request from the TCM to the main engine computer. While a faulty TCM is a very common cause, this code can also be triggered by internal transmission issues. However, if you’re also experiencing erratic shifting or other electronic symptoms, replacing the TCM is the most logical and common fix.