Get Your Workhorse Van Back on the Road Fast
If your 2006-2014 Chevrolet Express 3500 Van is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, the problem is very likely a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can sideline a reliable work van, costing you time and money. This isn’t just an inconvenience; it’s a critical failure that impacts your livelihood. This T42 TCM, part number 24241806, is the definitive solution to restore your transmission’s performance and reliability.
The TCM is the electronic brain of your automatic transmission, specifically the robust 4L80E in your Express Van. It constantly analyzes data from engine speed, vehicle speed, and throttle position to command precise, smooth shifts. When it fails, the communication breaks down, leading to the frustrating and sometimes dangerous symptoms you’re experiencing. Our module is meticulously tested and pre-programmed to your vehicle’s specific VIN, ensuring it works perfectly right out of the box—no expensive dealership visits for programming required.
Case Study: The Ghost in the Transmission
A local contractor brought in his 2011 Express 3500. The complaint was intermittent, bone-jarring shifts and occasionally getting stuck in 3rd gear (limp mode), especially on hot days after a long drive. He’d already replaced a shift solenoid on another mechanic’s advice, but the problem persisted. After hooking up my scan tool, I saw a generic P0700 code but also intermittent communication loss with the TCM. In my shop, I’ve learned that heat and vibration are the biggest enemies of these modules. We swapped in a VIN-programmed T42 TCM, and the problem was solved instantly. The van was back in service the same afternoon, a testament to how a correct diagnosis and a pre-programmed part can save days of downtime.
Is Your Express Van Showing These Red Flags?
A failing TCM will give you clear warning signs. Ignoring them can lead to more severe transmission damage. Here’s what to look for:
- ✔ Vehicle is stuck in one gear (often called “limp mode”).
- ✔ Harsh, erratic, or delayed gear shifting.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, or other solenoid-related faults.
- ✔ A noticeable drop in fuel economy.
- ✔ The transmission seems to slip between gears.
- ✔ Inability to shift into or out of a specific gear.
Simple Steps to Restore Your Van’s Shifting
Replacing the 2006-2014 Express 3500 TCM is a straightforward job that most DIYers or any professional mechanic can complete in under an hour. For the Express and Savana vans, the module is conveniently located in the engine compartment.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the TCM: On your Express 3500, you’ll find the TCM in the engine compartment, typically 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. While the module is plug-and-play, it’s good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory. Start the engine 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. While this page focuses on the 2006-2014 Express 3500 TCM, it is also compatible with the following models. Please verify the location noted for your specific vehicle.
- Chevrolet: Avalanche 1500 (07-08), Cobalt (06-10), Colorado (08-12), Express 1500/2500/3500 Van (06-14), HHR (06-11), Impala (06-11), Monte Carlo (06-07), Silverado 1500/2500 (07-13), SSR (05-06), Tahoe (07-09), Trailblazer (06-09)
- GMC: Canyon (08-12), Envoy / XL / EXT (06-09), Savana 1500/2500/3500 Van (06-14), Sierra 1500/2500 (07-13), Yukon / XL 1500 (07-09)
- Buick: Allure (06-09), LaCrosse (06-09), Lucerne (06-11), Rainier (06-07), Rendezvous (06-07)
- Cadillac: DTS (06-11)
- Pontiac: G5 (07-10), G6 (06-10), Grand Prix (06-08), Pursuit (06)
- Saturn: Aura (07-09), Ion (06-07), Vue (07-10)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
Frequently Asked Questions
Do I need to get this programmed by a dealer?
No. This is the biggest benefit of our service. We pre-program the module to your vehicle’s exact VIN before shipping. It arrives ready for plug-and-play installation, saving you hundreds of dollars and a trip to the dealership.
Is this part number 24241806 compatible with other numbers?
Yes, this T42 TCM is a direct replacement and interchangeable with a wide range of part numbers, including 24252114, 24234503, 24240400, and many others listed in the product details.
What tools are required for installation?
Installation is simple. You’ll typically only need a basic socket set to remove the mounting bolts and a flathead screwdriver to help with the connector tabs if they are stubborn. No special diagnostic equipment is needed.
Is there a core charge?
No, we do not require a core charge. You can keep your old part, so there’s no hassle with return shipping or waiting for a refund.