Is Your Chevy Express Van Experiencing Shifting Problems?
Your 2006-2014 Chevrolet Express 3500 is a workhorse, but even the most reliable van can suffer from transmission issues. If you’re dealing with harsh shifting, delayed gear engagement, or a check engine light that points to transmission codes like P0700, the culprit is often a failing Transmission Control Module (TCM). This critical component is the brain of your automatic transmission, and when it malfunctions, it can sideline your vehicle and disrupt your work. This genuine quality GM T42 TCM, service number 24238856, is the definitive solution to restore your van’s performance and reliability.
From the Diagnostic Bay
We recently had a 2011 Express 3500 cargo van come into the shop. The owner, a local plumber, said it was shifting so hard between first and second gear that it felt like he was being rear-ended. It was also intermittently getting stuck in ‘limp mode,’ leaving him stranded in third gear. A quick scan showed a P0752 code for a stuck shift solenoid. After confirming the solenoid itself was fine, we knew the issue was upstream. The original TCM was failing, sending erratic signals. We installed one of our VIN-programmed T42 modules, cleared the codes, and the van was shifting like new in under an hour. It’s a common failure, but thankfully, it’s a straightforward fix.
Why Choose Our Programmed Express 3500 Transmission Module?
Unlike generic modules that require a trip to the dealership for expensive programming, our T42 Express 3500 Transmission Module arrives at your door ready for installation. We pre-program the unit using your vehicle’s VIN and the latest GM software updates. This ensures perfect communication between the TCM, the engine computer, and the transmission itself. The result is a plug-and-play repair that eliminates common diagnostic trouble codes (DTCs) and restores the smooth, precise shifting you expect from your vehicle. This module is the key to fixing issues related to the 4L60E, 4L65E, 4L70E, and 4L80E transmissions found in your van.
Symptoms of a Failing GM T42 TCM
- ✔ Harsh, erratic, or delayed gear shifts that disrupt driving.
- ✔ Vehicle entering ‘limp mode,’ often stuck in 2nd or 3rd gear.
- ✔ An illuminated Check Engine Light or Transmission Warning Light on your dashboard.
- ✔ Specific transmission-related DTCs, such as P0700, P0750, or other solenoid codes.
- ✔ Inability to upshift or downshift properly, leading to poor acceleration and fuel economy.
- ✔ Complete loss of communication with the transmission, preventing it from functioning.
- ✔ The torque converter failing to lock up, causing higher RPMs at cruising speeds.
Replacing your faulty TCM is not just about fixing a current problem; it’s about preventing further damage. A malfunctioning module can cause excessive wear on internal transmission components, leading to much more costly repairs down the road. By installing a new, properly programmed Express 3500 Transmission Module, you are safeguarding the longevity of your entire drivetrain. This module is a direct replacement for numerous part numbers, including 24252114, 24234503, 24239224, and 24242391, ensuring wide compatibility across a vast range of GM trucks, vans, and SUVs.
Frequently Asked Questions
What does VIN programming mean for me?
VIN programming means we flash the module with your specific vehicle’s software before shipping it. This makes the unit plug-and-play, saving you a trip to the dealership and the high cost of programming. It ensures the TCM works perfectly with your van’s engine and transmission from the moment it’s installed.
Is this a difficult part to install?
No, installation is quite straightforward for someone with basic mechanical skills. On the Express 3500, the TCM is typically located in the engine compartment on the right-hand side. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job usually takes less than 30 minutes.
Do I need to return my old TCM?
No core charge is required for this part. You can keep your old module or dispose of it at your convenience, making the process hassle-free.
Will this module fit other GM vehicles besides the Express van?
Yes, absolutely. This T42 TCM is compatible with a wide array of 2006-2014 GM vehicles equipped with 4-speed automatic transmissions like the 4L60E and 4L80E. This includes models like the Chevrolet Silverado, Tahoe, GMC Sierra, Yukon, Cadillac DTS, and many others. Please check the fitment list to confirm compatibility with your specific vehicle.
What is the function of the Transmission Control Module?
The TCM acts as the central computer for your automatic transmission. It receives data from various sensors (like vehicle speed and engine load) to determine the optimal time to shift gears, control hydraulic pressure, and manage the torque converter lockup. A properly functioning TCM ensures smooth performance, good fuel economy, and transmission longevity.