Restore Your Van’s Drivability and Reliability
If your 2006-2014 GMC Savana 1500 is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, the culprit is often 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 perfectly good work van. This isn’t just an annoyance; it’s a matter of reliability and safety. This T42 TCM, part number 24240400, is the definitive solution to restore the crisp, predictable shifting your van had from the factory.
The biggest headache with module replacement has always been the expensive and time-consuming trip to the dealership for programming. We eliminate that step entirely. By providing your vehicle’s VIN at checkout, we program the module with the latest GM software specifically for your van. This means it arrives at your door ready for a true plug-and-play installation, getting you back on the road and back to work faster.
A Technician’s Notebook
I recently had a 2011 Savana 1500 in the shop that was a diagnostic nightmare for another mechanic. The van would intermittently refuse to shift out of 2nd gear, but only after it was fully warmed up. There were no consistent solenoid codes, just a general P0700 (Transmission Control System Malfunction). After checking the wiring harness and fluid, I suspected the TCM was failing under heat. We swapped in one of our pre-programmed T42 modules, and the problem vanished instantly. It’s a classic failure mode for these units, and this part is the direct fix.
Is Your Savana Van Exhibiting These Transmission Faults?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s highly likely this module is the solution you need for your 2006-2014 Savana 1500 TCM.
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, P0758, etc.
- ✔ Inability to upshift or downshift properly as you accelerate or decelerate.
- ✔ Poor fuel economy and a feeling of sluggish performance.
- ✔ Complete loss of communication with the transmission module.
Quick-Swap Installation Guide for Your Savana Van
Replacing the TCM on your Savana is a straightforward job that most DIYers can complete in under 30 minutes with basic hand tools. No need to even lift the vehicle.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: On most Savana and Express vans, the TCM is located in the engine compartment on the right-hand (passenger) side, often near the firewall or main fuse block.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Firmly reconnect the electrical harnesses, ensuring they click and lock securely.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any stored fault codes. Take the van for a test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this page is focused on the 2006-2014 Savana 1500 TCM, it also fits the following models. Please verify the location noted for your specific vehicle.
- GMC Savana / Chevrolet Express 1500/2500/3500 (2006-2014): RH engine compartment
- GMC Sierra / Chevrolet Silverado 1500 (2007-2013): Next to battery
- GMC Yukon / Chevrolet Tahoe (2007-2009): Next to battery
- Cadillac DTS (2006-2011): RH front engine compartment
- Chevrolet Impala (2006-2011): Lower air cleaner housing
- Hummer H3 (2008-2010): RH rear engine compartment
- Chevrolet Colorado / GMC Canyon (2008-2012): RH rear engine compartment
- …and many other GM cars, trucks, and SUVs. See full list for details.
Frequently Asked Questions
Do I need to take this module to a dealer for programming?
No. This is the primary benefit of our service. We pre-program the module to your vehicle’s specific VIN before shipping. It arrives ready for installation, with no additional programming or calibration required.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases where the TCM itself has failed internally, replacing it with this part will resolve the P0700 code and any related specific codes (like for shift solenoids).
Is this a new or used part?
This is a high-quality, inspected, and tested OEM-grade component that has been expertly programmed for your vehicle. It is backed by our one-year warranty for your peace of mind.
What tools do I need for installation on my Savana van?
Installation is simple. You will typically only need a basic socket set (e.g., 10mm socket) to unbolt the module and a flathead screwdriver to help release the connector tabs if they are stubborn. No special automotive tools are required.
Is there a core charge for my old module?
No, there is no core charge. You are not required to send your old, faulty module back to us, saving you time and return shipping costs.