Is Your Work Van Sidelined by Transmission Problems?
As a shop owner for over 20 years, I know that for Express 3500 drivers, downtime isn’t just an inconvenience—it’s lost income. When your van starts shifting hard, gets stuck in a gear, or throws a transmission warning light, every minute it’s off the road costs you. You’re likely experiencing the classic signs of a failing Transmission Control Module (TCM), the electronic brain that manages your van’s automatic transmission.
Real-World Diagnosis: A Technician’s Story
“A customer’s 2011 Express 3500 came in last week with these exact symptoms: stuck in 3rd gear (limp mode) and a P0700 code. He was convinced his 4L80E transmission needed a full rebuild, a multi-thousand dollar job. After a quick scan, I suspected the TCM. Before swapping parts, I always check the main connector at the module for corrosion. On these work vans, moisture and dirt can get in. After cleaning it and seeing no change, we installed one of our pre-programmed TCMs. In under 30 minutes, the van was shifting perfectly, saving the customer a massive repair bill and getting him back to work the same day.”
Why a Programmed TCM is the Smart Solution
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a high-quality T42 TCM, compatible with part number 24230461, and professionally program it to your van’s specific Vehicle Identification Number (VIN). This critical step ensures the module communicates flawlessly with your engine computer and other systems right out of the box. You get optimal shift points, correct torque converter lockup, and reliable performance without a trip to the dealership for expensive programming.
Common Symptoms of a Failing Express 3500 TCM:
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear) to protect the transmission.
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750-P0758 (solenoid faults), or other transmission-related codes are present.
- ✔ Inconsistent shifting, poor fuel economy, or a complete loss of communication with the module.
Plug-and-Play Installation: No Dealer Visit Required
Getting your van back on the road is simple. For the 2006-2014 Express 3500 Transmission Control Module, the installation is straightforward and can be done with basic hand tools.
- 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 1500, 2500, and 3500 vans, 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 small screwdriver to gently release the locking tabs if necessary. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to run for a few moments. While not always necessary, using a basic scan tool to clear any stored fault codes is a good final step.
This module is a direct replacement for a wide range of GM part numbers, including 24252114, 24234503, 24230461, 24234274, 24235340, 24256960, and more. By providing your VIN at checkout, you guarantee a part that works perfectly for your specific vehicle configuration, backed by our one-year warranty. Don’t let a faulty module keep your business parked. Order today and restore the reliable performance your Express van was built for.