Get Your Workhorse Back on the Road: The Definitive Fix for Savana Transmission Problems
As a mechanic with over two decades of experience, I know that a work van like your 2006-2014 GMC Savana 3500 isn’t just a vehicle—it’s your livelihood. When the transmission starts acting up, every minute of downtime costs you money and creates massive headaches. If you’re dealing with harsh, unpredictable shifting, a van that’s stuck in limp mode, or a persistent check engine light, you’ve likely pinpointed the culprit: a failing Transmission Control Module (TCM). This plug-and-play T42 TCM, part number 24252114, is the reliable, no-nonsense solution to get your Savana running smoothly again, without an expensive trip to the dealership.
From the Diagnostic Bay
I recently had a contractor bring his ’09 Savana 3500 into the shop. The van was stuck in what felt like third gear (limp mode) and had the check engine light glaring at him. He was worried he was looking at a full transmission rebuild, which would have put him out of work for days. After pulling the codes, I saw the classic P0700 (Transmission Control System Malfunction). Instead of jumping to the worst-case scenario, we checked the TCM. Sure enough, it was faulty. We swapped in one of these VIN-programmed units, cleared the codes, and had him back on the road in under an hour. He saved thousands and, more importantly, got back to his job site the same day. This is the most common fix for these symptoms.
Is Your Savana Van Showing These Warning Signs?
A failing TCM will give you clear signals. If you’re experiencing any of the following, it’s time for a replacement. This single component is often the root cause of what can feel like a catastrophic transmission failure.
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults are present.
- ✔ The transmission refuses to upshift or downshift properly.
- ✔ A noticeable drop in fuel economy or signs of the transmission overheating.
A Straightforward Guide to Installation
You don’t need to be a master mechanic to install this part. The process is simple and can be done with basic hand tools in your driveway or shop.
- Safety First: Always disconnect the negative terminal on your vehicle’s battery before starting any electrical work.
- Locate the Module: On the 2006-2014 Savana 3500, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount your new, pre-programmed module in the same location and securely reconnect the electrical harnesses.
- Final Steps: Reconnect the battery terminal. While our programming handles the setup, it’s best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Why This Programmed 2006-2014 Savana 3500 TCM is the Smart Choice
This isn’t just a replacement part; it’s a complete solution designed to save you time and money. We handle the complex part so you can focus on the simple installation.
- ✔ Plug-and-Play Installation: We pre-program the module to your van’s specific Vehicle Identification Number (VIN). This ensures it works perfectly right out of the box, with no need for dealer-level software or tools.
- ✔ OEM-Level Reliability: Built to meet or exceed original equipment standards, this module provides a dependable, long-term fix for common transmission issues associated with the 4L80E and other GM transmissions.
- ✔ No Core Charge: Don’t worry about the hassle and expense of sending your old part back. You can keep it or dispose of it at your convenience.
- ✔ Backed by a Warranty: Drive with confidence knowing your purchase is protected by our one-year warranty.
Verified Vehicle Compatibility
This T42 TCM is a direct fit for a wide range of General Motors vehicles. While this listing is for the 2006-2014 Savana 3500 TCM, it is also compatible with the following models. Please verify your specific model and location notes.
- GMC Savana / Chevrolet Express (1500, 2500, 3500): 2006-2014 (RH engine compartment)
- GMC Sierra / Chevrolet Silverado (1500, 2500): 2007-2013 (Varies, often next to battery)
- Chevrolet Tahoe / GMC Yukon: 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)
- …and many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
What information do you need to program the TCM?
We require your vehicle’s 17-digit VIN at checkout. This allows us to load the correct software and calibrations for your specific Savana Van, ensuring a seamless installation.
Is this a difficult part to install myself?
Not at all. For a Savana, it’s located in an accessible spot in the engine bay. With basic tools, most DIYers can complete the swap in under 30 minutes. The key is that our programming eliminates the most difficult step.
Will this fix a P0700 code?
A P0700 is a general code indicating the TCM has detected a fault. While this module often resolves the root cause (like an internal short), it’s crucial to ensure the transmission wiring and solenoids are in good condition as well. In most cases I’ve seen, the TCM itself is the problem.
Do I need to send my old module back?
No. There is no core charge or requirement to return your old part. This saves you time and return shipping costs.
What if I install it and still have problems?
First, ensure all DTCs have been cleared with a scan tool after installation. If issues persist, it could indicate a problem elsewhere in the system, such as a faulty solenoid or wiring harness. Our expert support team is here to help you diagnose the issue.