Restore Peak Performance to Your Workhorse Van
If your 2006-2014 GMC Savana 3500 is experiencing delayed shifting, getting stuck in limp mode, or displaying a check engine light, a failing Transmission Control Module (TCM) is a likely cause. These issues can sideline your work van, compromising its reliability and fuel efficiency. This replacement T42 TCM, part number 24252114, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a hassle-free, plug-and-play installation. Restore the crisp, predictable shifting your GM 4-speed automatic transmission (like the 4L80E) was designed to deliver.
From the Diagnostic Bay
I remember a fleet manager bringing in a 2011 Savana 3500. The van was stuck in limp mode, and his mechanic had already replaced two shift solenoids, costing him time and money with no fix. The scanner was still showing a generic P0700 code. In my experience, when you see repeat solenoid codes after replacement, the issue is almost never the new solenoid. It’s often the driver circuit inside the TCM. We swapped in a VIN-programmed T42 module, cleared the codes, and the van shifted perfectly. The root cause was a failing TCM unable to properly command the solenoids. This is a classic scenario I’ve seen hundreds of times on these GM platforms.
Is Your Savana Exhibiting These Transmission Faults?
- ✔ Harsh, delayed, or unpredictable gear shifts that make driving uncomfortable.
- ✔ The vehicle enters “limp mode,” often stuck in 2nd or 3rd gear, with limited power.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-series (Shift Solenoid), or other communication errors.
- ✔ Complete loss of upshifts or downshifts, leading to poor acceleration and high RPMs.
- ✔ A noticeable drop in fuel efficiency as the transmission operates inefficiently.
Why Choose Our Programmed Savana 3500 Transmission Module?
This isn’t just a replacement part; it’s a complete repair solution. By pre-programming the module with the latest GM software updates matched to your VIN, we eliminate the need for expensive dealership programming. This saves you hundreds of dollars and significant downtime. Built to meet or exceed OEM specifications, our T42 TCM ensures long-term reliability for your hard-working van, backed by a one-year warranty.
A Straightforward Guide to Installation
- ✔ Safety First: Park on a level surface and disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- ✔ Locate the Module: On the 2006-2014 Savana 3500 Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side. Consult your service manual for the exact position.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Mount the new, pre-programmed TCM in place and secure the bolts. Reconnect the electrical harnesses, ensuring they click securely into place.
- ✔ Final Steps: Reconnect the negative battery terminal. While our programming handles the critical setup, it’s best practice to use a basic scan tool to clear any stored DTCs from the vehicle’s memory. Start the vehicle and test drive to confirm smooth shifting.
Verified Fitment for Your General Motors Vehicle
This module is a direct replacement for part number 24252114 and other interchangeable numbers. It is compatible with a wide range of GM vehicles, including but not limited to:
- GMC Savana 1500/2500/3500 Van (2006-2014)
- Chevrolet Express 1500/2500/3500 Van (2006-2014)
- Chevrolet Silverado & GMC Sierra (2007-2013)
- Chevrolet Tahoe & GMC Yukon (2007-2009)
- Cadillac DTS (2006-2011)
- Buick LaCrosse / Lucerne (2006-2011)
- Chevrolet Impala (2006-2011)
- Pontiac G6 / Grand Prix (2006-2010)
- Hummer H3 (2008-2010)
- And many more models listed in the compatibility chart.
Frequently Asked Questions
Do I need to take my van to the dealership for programming?
No. This module arrives pre-programmed to your vehicle’s VIN. It’s a true plug-and-play solution, saving you the time and expense of a dealer visit.
What is a T42 TCM?
The T42 is the specific hardware platform used by General Motors for the transmission control module in a wide range of vehicles from this era, controlling 4-speed automatic transmissions like the 4L60E and 4L80E.
Will this fix a P0700 code?
A P0700 code is a generic fault code indicating the TCM has detected a problem. While this module often resolves the root cause (like failed internal drivers that trigger other codes), you should always diagnose any specific solenoid or sensor codes that accompany it. In many cases, a faulty TCM is the primary culprit.
Is this part difficult to install for a DIYer?
Not at all. For most models, including the Savana van, the TCM is easily accessible in the engine bay. With basic hand tools, the replacement can be completed in under 30 minutes.
Is there a core charge for my old part?
No, we do not require you to send back your old module. There is no core charge, making the process simpler and more convenient for you.