Get Your Workhorse Van Back on the Job, Fast
As a technician with over two decades of experience, I know that when a work van like your Chevy Express is down, it’s not just an inconvenience—it’s costing you money. Erratic shifting, a check engine light, or being stuck in limp mode can bring your business to a standstill. The culprit is often a failed Transmission Control Module (TCM). This replacement T42 TCM, part number 24241806, is the reliable, no-nonsense solution to get your 2006-2014 Express 1500 TCM functioning perfectly again, without the costly downtime of a dealership visit.
This isn’t just a part; it’s a complete solution. We pre-program the module to your van’s specific Vehicle Identification Number (VIN) before it ships. This means it arrives at your door ready for a true plug-and-play installation. It correctly communicates with your van’s 4L60E, 4L65E, or 4L80E transmission, restoring crisp, predictable shifts and clearing those persistent trouble codes for good.
A Technician’s Notebook: The Phantom No-Start
A local contractor brought in his 2011 Express 1500. The complaint was intermittent harsh shifting, but the real mystery was a random no-start condition. The battery was fine, the starter was good, but sometimes it just wouldn’t crank. After checking the basics, I hooked up my professional scan tool. The TCM wasn’t communicating consistently. On these GM vans, a faulty TCM can disrupt the entire CAN bus network, preventing the ECM from getting the ‘Park/Neutral’ signal it needs to allow the engine to start. We swapped in a VIN-programmed TCM, and both the shifting issues and the phantom no-start were resolved instantly. It’s a perfect example of how a failing 2006-2014 Express 1500 TCM can cause symptoms you might not expect.
Is Your Express Van Showing These Red Flags?
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid Faults), or U-codes for loss of communication.
- ✔ The transmission refuses to upshift or downshift properly.
- ✔ A noticeable drop in fuel economy or signs of the transmission overheating.
Simple Installation Guide for Your Express Van
Getting your van back on the road is easier than you think. For the Chevy Express and GMC Savana, the TCM is typically located in the engine compartment on the right-hand (passenger) side. The job takes 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 Module: Find the TCM on the RH side of the engine bay. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unclip the wiring harness connectors. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Bolt the new, pre-programmed module into place. Securely reconnect the wiring harnesses, making sure they click into place.
- Final Steps: Reconnect the battery terminal. Start the engine and let it idle for a few minutes. While the module is programmed, it’s always good practice to use a basic scan tool to clear any stored fault codes from other modules.
Will This Fit My Vehicle?
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles. While it is the correct part for the 2006-2014 Express 1500 TCM, it also fits many other models. Please verify your vehicle is on this list. Interchangeable part numbers include: 24252114, 24234503, 24230461, 24234274, 24241806, 24256960, and more.
Frequently Asked Questions
Do I need to take my van to the dealer for programming?
No. This module is delivered to you pre-programmed to your vehicle’s VIN. It is a plug-and-play solution that requires no additional dealership programming, saving you time and money.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part, built to meet or exceed original specifications and backed by our one-year warranty. It is not a used part from a junkyard.
Where is the TCM located on my 2012 Express Van?
On most 2006-2014 Express and Savana vans, the Transmission Control Module (TCM) is located in the engine compartment, mounted on the right-hand (passenger) side.
What if I order the wrong part?
We guarantee fitment. If you provide your VIN at checkout, we will ensure the module is programmed correctly for your specific vehicle. Our expert support team is here to help you get the right part the first time.
Do I need to send my old TCM back (core charge)?
No, there is no core charge for this part. You can keep or dispose of your old module without any hassle.