Get Your Work Van Back on the Road: A Reliable Fix for Transmission Problems
If your 2006-2014 GMC Savana 2500 is suffering from delayed shifts, getting stuck in gear, or throwing transmission codes, a faulty Transmission Control Module (TCM) is the most likely culprit. As the electronic brain of your automatic transmission (like the 4L80E), the TCM controls everything from shift points to torque converter lockup. When it fails, your van’s performance and reliability are compromised. This T42 series TCM, part number 24235732, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play repair.
A Technician’s Notebook: The Intermittent Fault
I had a fleet customer bring in a 2011 Savana 2500 work van with a complaint that drove their driver crazy: intermittent, bone-jarring shifts and occasionally getting stuck in 3rd gear (limp mode), but only after the van was fully warmed up. No check engine light was on, but a deep scan with a proper tool revealed stored communication fault codes with the TCM. Heat soak in the engine bay is a common killer of these modules. Instead of a costly diagnostic chase or a transmission teardown, we started with the brain. We installed one of our VIN-programmed T42 modules. The fix took less than 20 minutes, and the van was back in service the same day, shifting perfectly. This is a classic failure I’ve seen hundreds of times on GM workhorses.
Is Your Savana Van Exhibiting These Transmission Faults?
A failing TCM will give you clear warning signs. If you’re experiencing any of the following, it’s time for a replacement. Ignoring these symptoms can lead to more significant transmission damage.
- âś” Harsh, erratic, or delayed gear shifts.
- âś” Vehicle is stuck in “limp mode” and will not shift out of 2nd or 3rd gear.
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as the generic P0700 or specific solenoid codes like P0751, P0756.
- âś” Complete loss of upshifting or downshifting capabilities.
- âś” Noticeable decrease in fuel economy due to inefficient shifting.
- âś” The transmission seems to slip between gears under load.
Your Straightforward Installation Guide
One of the best features of this module is its ease of installation. You don’t need a lift or specialized transmission tools. For the GMC Savana, the process is especially simple.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the TCM: On your 2006-2014 Savana Van, the TCM is located in the engine compartment on the right-hand (passenger) side. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely plug in the wiring harness connectors until they click.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. While the module is programmed, it’s good practice to use a basic OBD2 scan tool to clear any old fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct-fit replacement for a wide range of General Motors vehicles. While this page focuses on the 2006-2014 Savana 2500 TCM, it also fits the following models. Please verify your part number (24235732) or one of its interchanges (24242391, 24234503, etc.) for a guaranteed match.
- Chevrolet Express / GMC Savana (1500, 2500, 3500) | 2006-2014
- Chevrolet Silverado / GMC Sierra (1500, 2500) | 2007-2013
- Chevrolet Tahoe / GMC Yukon | 2007-2009
- Chevrolet Impala | 2006-2011
- Chevrolet Cobalt / HHR / Malibu | 2006-2011
- Cadillac DTS | 2006-2011
- Buick LaCrosse / Lucerne | 2006-2011
- Pontiac G6 / Grand Prix | 2006-2010
- And many other GM models from 2006-2014.
Frequently Asked Questions
What does “VIN Programmed” mean for me?
It means this module is ready for installation right out of the box. We flash it with your vehicle’s unique VIN, loading the correct software and shift strategies for your specific engine and transmission combination. This allows you to skip the expensive and time-consuming trip to a dealership for programming.
Do I need any special tools for this job?
No special tools are required. Basic hand tools, like a socket set to unbolt the module and disconnect the battery, are all you need. An OBD2 scanner is recommended to clear any stored codes after installation, but is not strictly necessary for the part to function.
Is there a core charge for my old part?
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.
Will this fix a P0700 trouble code?
Yes, in most cases. A P0700 code is a generic fault code indicating the TCM has detected a problem and requested the check engine light. If the TCM itself is the source of the failure, replacing it will resolve the P0700 and any related specific codes (like for shift solenoids).
What if I have a different part number on my old module?
This module replaces many different GM service numbers. Check the list of compatible part numbers in the product details, such as 24252114, 24234503, and others. As long as your part number is on our interchange list, this module will work for you.