The Command Center of Your Van’s Transmission
Is your 2006-2014 GMC Savana 3500 van struggling with gear changes, stuck in limp mode, or showing a persistent check engine light? These are classic signs that the Transmission Control Module (TCM), the electronic brain of your automatic transmission, is failing. The TCM is responsible for interpreting data from various sensors to execute precise, smooth shifts. When it malfunctions, it can disrupt your vehicle’s performance, reliability, and fuel economy, turning a dependable workhorse into a source of frustration.
This genuine OEM-quality GM T42 Transmission Control Module, service part number 24241806, is the definitive solution. It arrives expertly pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits for flashing or calibration. This ensures a seamless, plug-and-play installation that restores the crisp, predictable shifting your Savana 3500 had from the factory.
From the Diagnostic Bay
We had a commercial client bring in their 2011 Savana 3500 work van. The complaint was harsh shifting and occasionally getting stuck in 3rd gear. They had already spent a small fortune at another shop that insisted it was an internal transmission failure and quoted a full rebuild. We hooked up our scanner and immediately saw a series of solenoid circuit codes and a P0700 (Transmission Control System Malfunction). Experience told us to check the TCM first. The module was showing erratic data. We installed one of our VIN-programmed T42 modules, cleared the codes, and took it for a test drive. The van shifted perfectly, just like new. The client saved thousands of dollars by correctly diagnosing the electronic issue instead of tearing into the mechanical components.
Is Your Van Showing Signs of a Faulty Savana 3500 TCM?
A failing TCM can manifest in several ways, often mistaken for more severe mechanical issues. If you’re experiencing any of the following symptoms, your transmission control module is the most likely culprit:
- ✔ Harsh or Erratic Shifting: The vehicle slams into gear, hesitates, or shifts at the wrong times.
- ✔ Stuck in Limp Mode: The transmission will not shift out of a single gear (usually 2nd or 3rd) to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a dedicated transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes include P0700, P0750-P0758 (solenoid circuit faults), or U-codes indicating communication loss.
- ✔ Delayed Engagement: A noticeable lag when shifting from Park into Drive or Reverse.
- ✔ Poor Fuel Economy: Inefficient shifting patterns cause the engine to work harder, consuming more fuel.
The Plug-and-Play Solution for Your GM Vehicle
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The most critical feature is our professional VIN programming service. Before shipping, we load your vehicle’s exact VIN into the module, ensuring it communicates flawlessly with the Engine Control Module (ECM) and other vehicle systems. This process installs the latest GM software updates, often resolving factory-known issues and improving overall transmission performance and longevity. By choosing our pre-programmed Savana 3500 TCM, you bypass the typical programming fees and logistical headaches associated with a dealership visit.
Simple Installation Process
Installation is straightforward for a DIY mechanic or any professional technician. On the GMC Savana 3500, the TCM is typically located in the engine compartment on the right-hand (passenger) side. The process generally takes less than 30 minutes.
- Safety First: Disconnect the negative terminal of your vehicle’s battery.
- Locate the Old Module: Find the TCM in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors and unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place and securely reconnect the electrical harnesses.
- Final Steps: Reconnect the battery. While the module is plug-and-play, it’s best practice to use a standard OBD2 scan tool to clear any stored DTCs from the system.
Frequently Asked Questions
What does a VIN-programmed TCM mean?
It means we flash the module with your vehicle’s unique 17-digit Vehicle Identification Number (VIN) before it ships. This ensures the TCM has the correct software and calibration files to work perfectly with your Savana’s specific engine, transmission, and options, making it a true plug-and-play part.
Will this fix my transmission code P0700?
A P0700 is a generic code indicating the TCM has detected a fault and has requested the Check Engine Light to be turned on. This part will resolve the P0700 if the root cause is a failing TCM or related internal circuit faults. It’s crucial to diagnose any other codes that appear alongside the P0700 to confirm the TCM is the issue.
Where is the TCM located on my 2011 GMC Savana 3500?
For the 2006-2014 GMC Savana 2500 and 3500 vans, the Transmission Control Module is located in the engine compartment, mounted on the right-hand (passenger) side. Always confirm the location before beginning work.
Are any special tools required for installation?
No special tools are needed. Basic hand tools, such as a socket set and ratchet, are all that’s required to remove and replace the module. An OBD2 scanner is recommended to clear any old codes after installation is complete.
Is there a core charge or do I need to send my old part back?
No, there is absolutely no core charge for this part. You can keep your old module, which saves you the time, cost, and hassle of packaging and shipping a core return.