Restore Smooth Shifting to Your Workhorse Van
If your 2006-2014 GMC Savana 2500 Van is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, a failing Transmission Control Module (TCM) is the most likely culprit. As the brain of your automatic transmission, the T42 TCM governs every gear change and torque converter operation. A faulty one can bring your work to a halt. This direct-replacement module, part number 24238856, is the reliable solution to get your van back on the road and running dependably, without the high costs and delays of a dealership visit.
A Technician’s Notebook: The Case of the Limp-Mode Fleet Van
I had a local contractor bring in his 2011 Savana 2500, complaining it was stuck in what felt like third gear—a classic case of limp mode. His check engine light was on, and my scan tool pulled a P0700 (Transmission Control System Malfunction) and a P0752 (Shift Solenoid A Stuck On). He was worried about a costly transmission rebuild. After confirming the wiring harness and solenoids were okay, I pinpointed the T42 TCM. These modules, especially in hardworking vans, often fail internally from heat cycles and vibration. We installed one of our VIN-programmed modules, and in less than an hour, the van was shifting perfectly. He saved hundreds, maybe thousands, and avoided critical downtime for his business.
Is Your Savana Van Exhibiting These Transmission Problems?
A failing TCM can manifest in several ways. If you’re noticing any of the following, it’s time to consider a replacement. In my shop, these symptoms almost always point to a faulty module in this vehicle platform.
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Your van is stuck in “limp mode” and won’t shift out of 2nd or 3rd gear.
- ✔ Check Engine Light is on with codes like P0700, P0750, P0751, P0752, or other solenoid-related DTCs.
- ✔ Inability to upshift or downshift, leading to poor acceleration and terrible fuel economy.
- ✔ The transmission feels like it’s slipping between gears.
- ✔ Complete loss of communication with the transmission module.
Key Benefits of Our Programmed T42 Module
This isn’t just a replacement part; it’s a complete, ready-to-install solution for your 2006-2014 Savana 2500 TCM issues.
- ✔ 100% Plug-and-Play: We program the module to your van’s specific VIN before shipping. This means no expensive trip to the dealer for programming. Just install it and go.
- ✔ Restored Performance: Loaded with the latest GM software updates to ensure precise shift points, proper torque converter lockup, and improved fuel efficiency.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications for a long service life, backed by a one-year warranty.
- ✔ Broad Compatibility: This T42 module is a direct replacement for numerous part numbers, including 24252114, 24234503, 24238856, and more.
DIY-Friendly Installation: Back on the Job in Minutes
Replacing the 2006-2014 Savana 2500 TCM is a straightforward job that most DIY mechanics can handle in their own driveway. No special tools are required.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the Module: On the Savana and Express 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 socket wrench to remove the bolts holding the old module in place.
- Install the New Module: Mount your new, pre-programmed TCM and securely fasten the bolts. Reconnect the electrical connectors, ensuring they click into place.
- 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 DTCs from the system’s memory. Start the vehicle and test drive to confirm smooth operation.
Verified Vehicle Compatibility
This module is guaranteed to fit the following vehicles. Please confirm your model and year before ordering.
- GMC SAVANA 2500 VAN: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 (RH engine compartment)
- Chevrolet EXPRESS 2500 VAN: 2006-2014 (RH engine compartment)
- Chevrolet SILVERADO & GMC SIERRA (1500/2500): 2007-2013 (Various locations, check notes)
- Chevrolet TAHOE & GMC YUKON: 2007-2009 (Next to battery)
- …and many other GM cars, trucks, and SUVs from 2006-2014. See the full fitment list for details.
Do I need to have this module programmed by a dealer?
No. The main benefit of our service is that we pre-program the module to your vehicle’s VIN before it ships. This makes the installation truly plug-and-play, saving you time and money.
Is there a core charge for my old part?
Absolutely not. We do not require you to send back your old, faulty module. You can keep it or dispose of it at your convenience, making the process hassle-free.
What information do you need from me to program it?
During checkout, you will be prompted to provide your vehicle’s 17-digit Vehicle Identification Number (VIN). This is essential for us to load the correct software for your specific vehicle configuration.
What kind of warranty is included?
This transmission control module comes with a one-year replacement warranty, giving you peace of mind that you’re buying a quality, reliable part.
Will this fix a P0700 code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (like an internal short), it’s important to ensure other components like wiring and solenoids are in good condition. In most cases I’ve seen, a new TCM is the correct fix.