Get Your Workhorse Van Back on the Road Fast
If your 2006-2014 Chevrolet Express 2500 Van is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, you’re not just dealing with an annoyance—you’re losing valuable time and money. As the brain of your automatic transmission, a failing Transmission Control Module (TCM) can bring your operations to a halt. This T42 TCM, service part number 24234503, is the definitive solution, arriving expertly programmed to your van’s specific VIN. This eliminates the need for expensive dealership visits and gets your reliable workhorse back in service where it belongs.
Case Study: A Tricky Diagnosis
I had a 2009 Express 2500 cargo van towed to my shop last month. The owner, a local contractor, said it suddenly wouldn’t shift past 2nd gear and the check engine light was on. It was classic limp mode. My scan tool pulled a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. Instead of immediately condemning the transmission, I checked the TCM first. These T42 modules are known to fail internally, causing all sorts of bizarre electrical ghosts. We ordered this exact VIN-programmed unit, swapped it out in under 20 minutes, cleared the codes, and the van was shifting perfectly. It saved the customer from a thousand-dollar-plus transmission rebuild they didn’t need.
Is Your Express Van Showing These Red Flags?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement. Addressing it now can prevent further damage to your transmission’s mechanical components.
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in “limp mode” and will not shift out of 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ A complete loss of communication with the transmission module.
- ✔ Poor fuel economy and a feeling of sluggish performance.
Get Your Van Back to Work: A 30-Minute Installation Guide
This is a repair you can confidently perform with basic hand tools. For the Chevrolet Express 2500 Van, the TCM is conveniently located, making for a straightforward swap.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On your Express Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new, pre-programmed module in the same location and securely fasten it. Reconnect the electrical connectors, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the van and test drive to confirm smooth shifting.
Verified Compatibility 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 2500 TCM, it also fits the following models. Please verify the location noted for your specific vehicle.
This part is interchangeable with service numbers: 24252114, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, and others.
SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
SILVERADO 1500 PICKUP 07-13 Transmission; (next to battery)
TAHOE 07-09 Transmission; (next to battery)
SIERRA 1500 PICKUP 07-13 Transmission; (next to battery)
YUKON 07-09 Transmission; (next to battery)
IMPALA 06-11 Transmission; (lower air cleaner housing)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
…and many more models listed in the compatibility chart.
Frequently Asked Questions
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for plug-and-play installation, with no dealership visit required.
On the 2006-2014 Express and Savana vans, the Transmission Control Module is located in the engine bay on the right-hand (passenger) side.
If the slipping is caused by electronic issues like incorrect line pressure commands or faulty solenoid signals from a bad TCM, then yes, this part is the solution. If the slipping is due to internal mechanical wear (e.g., worn clutch packs), the transmission itself may require service.
No, there is no core charge. You can keep or dispose of your old module without the hassle of returning it.
This module is backed by our one-year warranty, covering any defects in materials or workmanship for your peace of mind.