If your 2006-2014 Chevrolet Express 1500 Van is suffering from transmission headaches like harsh shifting, delayed engagement, or getting stuck in limp mode, you’re not alone. As a technician with over two decades of experience, I’ve seen countless work vans sidelined by a faulty Transmission Control Module (TCM). The TCM is the electronic brain of your 4L60E or 4L80E transmission, and when it fails, it can bring your work to a grinding halt. This isn’t just an inconvenience; it’s lost time and money.
This T42 TCM, part number 24239224, is the definitive solution. We take the guesswork and dealership hassle out of the equation. Each module is expertly programmed to your van’s specific Vehicle Identification Number (VIN) before it ships. This ensures it communicates perfectly with your vehicle’s other systems right out of the box. You get a reliable, plug-and-play fix that restores the smooth, predictable shifting your Express Van had from the factory.
Case Study: The ‘Slipping’ Savana
A local contractor brought in his 2011 Savana 2500, a sister van to the Express. The complaint was ‘slipping’ between 2nd and 3rd gear and a persistent Check Engine light. His scanner showed a P0751 (Shift Solenoid ‘A’ Performance/Stuck Off). He had already replaced the solenoid, but the problem remained. After a quick data check, I noticed the TCM was commanding the shift, but the feedback was erratic. This is a classic sign of internal TCM failure. Instead of a costly transmission rebuild, we installed one of these VIN-programmed T42 modules. The total time on my lift was under an hour, the code was cleared, and the van was shifting perfectly. It saved him thousands and got his business back on the road the same day.
Is Your Express Van Showing These Red Flags?
A failing TCM will give you clear warning signs. If you’re experiencing any of the following, it’s time for a replacement:
- ✔ Harsh, banging shifts or erratic gear hunting.
- ✔ The transmission feels like it’s slipping or won’t engage properly from a stop.
- ✔ Your van is stuck in one gear (often 2nd or 3rd) and won’t shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, P0751, or other solenoid-related faults.
- ✔ A noticeable drop in fuel economy or the transmission seems to be running hotter than usual.
- ✔ Complete loss of communication with the transmission.
Simple Installation to Get Your Van Moving
One of the best parts about this solution is how straightforward the installation is for a DIYer or a professional. No special programming tools are needed. For a 2006-2014 Express 1500 TCM, the module is typically easy to access.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the TCM: On Express and Savana vans, you’ll find the TCM in the engine compartment, mounted on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock in.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any stored diagnostic trouble codes (DTCs).
Verified Fitment For Your GM Vehicle
While this is the ideal part for your Express Van, this versatile T42 module is also a direct-fit replacement for a wide range of other GM cars, trucks, and SUVs. Please verify your model and part number. This part is interchangeable with service numbers including 24252114, 24234503, 24239224, and others.
Fits Models Including: Chevrolet Express/Silverado/Tahoe/Impala, GMC Savana/Sierra/Yukon, Cadillac DTS, Buick LaCrosse, Pontiac G6, Hummer H3, and more. For your 2006-2014 EXPRESS 1500 VAN, the location is the RH engine compartment.
Frequently Asked Questions
Is this part truly plug-and-play?
Yes. Because we program it with your vehicle’s VIN before shipping, it is ready for installation right out of the box. No further dealership flashing or programming is required.
Do I need to send my old part back?
No, there is no core charge for this module. You can keep or dispose of your old part at your convenience.
What tools are required for installation?
Typically, you will only need basic hand tools, such as a socket set and a wrench to disconnect the battery. The entire process usually takes less than 30 minutes.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. This part will often resolve the underlying issue that caused the P0700, such as a solenoid performance code or internal module error.
What is the warranty on this module?
This module comes with a one-year warranty, giving you peace of mind and confidence in your repair.