If your 2006-2014 Chevrolet Express 3500 Van is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, your Transmission Control Module (TCM) is the likely culprit. As the electronic brain of your automatic transmission, a failing T42 TCM can bring your workhorse vehicle to a grinding halt. This isn’t just an inconvenience; it’s downtime that costs you money. This replacement TCM, part number 24241806, is the reliable, professional-grade solution to get your van back on the road and working as hard as you do.
Unlike generic modules that require expensive trips to the dealership for programming, this unit arrives at your door fully programmed to your van’s specific Vehicle Identification Number (VIN). We load the latest GM software updates, ensuring it communicates flawlessly with your vehicle’s systems right out of the box. This eliminates common software-related bugs and provides a permanent fix for persistent diagnostic trouble codes (DTCs). Restore the crisp, predictable shifting and dependable performance your Express Van was built for.
From the Diagnostic Bay: The Case of the Intermittent Limp Mode
A local contractor brought in his 2011 Express 3500 work van with a frustrating problem. He said, ‘Some days it runs fine, others it won’t shift out of 2nd gear.’ He’d already replaced two shift solenoids at another shop, but the issue kept returning, always with a P0700 code. In my 20+ years of diagnostics, intermittent electronic faults are the toughest to pin down. After confirming the wiring harness was solid, we focused on the TCM. Heat soak in the engine bay can cause these T42 modules to fail intermittently. We installed one of our VIN-programmed TCMs, and the problem was solved instantly. The van has been running without a single hiccup for over a year. It’s a classic example of how replacing the right component saves time, money, and headaches.
Is Your Work Van Showing These Red Flags?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear) to protect the transmission.
- ✔ The Check Engine Light or a transmission warning light is on.
- ✔ Scan tool shows generic transmission codes like P0700 or specific solenoid faults (e.g., P0751, P0756).
- ✔ Inconsistent or no shifting, leading to poor acceleration and terrible fuel mileage.
- ✔ Complete loss of communication with the transmission module.
30-Minute Install to Get Your Van Back to Work
This module is designed for a straightforward installation that a DIYer or professional mechanic can complete quickly. For the Express/Savana vans, the location is consistent and accessible.
- 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 Express 3500 Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a socket wrench to remove the bolts holding the old module in place.
- Install the New TCM: Mount the new, VIN-programmed module and securely fasten the bolts. Reconnect the electrical connectors, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While our programming resolves most codes, it’s best practice to use a scan tool to clear any stored DTCs from other modules. Start the vehicle and test drive to confirm smooth shifting.
Verified Fitment for Your GM Vehicle
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions (like the 4L60E, 4L65E, 4L70E, and 4L80E). While this page focuses on the 2006-2014 Express 3500 Van, it is also compatible with the following models:
- Chevrolet: Express/Savana 1500/2500/3500 (06-14), Silverado (07-13), Tahoe (07-09), Impala (06-11), Cobalt (06-10), HHR (06-11), Colorado (08-12)
- GMC: Sierra (07-13), Yukon (07-09), Savana (06-14), Canyon (08-12), Envoy (06-09)
- Buick: LaCrosse (06-09), Lucerne (06-11), Rainier (06-07)
- Cadillac: DTS (06-11)
- Pontiac: G6 (06-10), Grand Prix (06-08)
- Hummer: H3 (08-10)
- And more. This module interchanges with part numbers 24252114, 24234503, 24241806, and others.
Do I need to take my van to a dealer after installation?
Do I need to take my van to a dealer after installation?
No. The main benefit of our service is that we program the module to your vehicle’s VIN before shipping. This means it’s ready for plug-and-play installation, saving you the time and expense of a dealership visit.
What is the warranty on this TCM?
This module is backed by our one-year, hassle-free warranty. We stand behind the quality and programming of our electronic components.
Is this a difficult part for a DIY mechanic to replace?
Not at all. For most applications, including the Express Van, this is a very straightforward job requiring basic hand tools. It’s typically located in an accessible spot in the engine bay and can be swapped in under 30 minutes.
Is there a core charge for my old part?
No, we do not require a core return. You can keep your old module, which simplifies the process and gets your vehicle repaired faster.