Is Your Savana 1500 Shifting Erratically?
If you’re experiencing harsh shifting, delayed gear engagement, or your 2006-2014 GMC Savana 1500 is stuck in ‘limp mode,’ a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the brain of your automatic transmission, responsible for orchestrating every gear change and ensuring smooth, efficient operation. When it fails, it can cause a cascade of frustrating and potentially damaging issues, from poor fuel economy to a complete inability to shift gears. Don’t let a faulty module sideline your work van or family vehicle. This OEM-quality T42 TCM is the definitive solution, pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay
We had a 2011 Express van come into the shop with classic transmission failure symptoms: banging into gear and a P0700 code. The owner had already spent a small fortune replacing multiple shift solenoids based on a generic code reader’s output, but the problem persisted. After a quick diagnostic, we identified the T42 TCM as the root cause. The internal circuitry was failing, sending erratic signals to the very solenoids he had just replaced. We installed one of our VIN-programmed modules, cleared the codes, and the van was shifting perfectly within 30 minutes. It’s a classic case of treating the cause, not just the symptom.
Symptoms of a Failing GM T42 TCM
A failing TCM can manifest in various ways. If you notice any of the following signs, it’s time to inspect your module. Ignoring these warnings can lead to more severe transmission damage.
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ Vehicle is stuck in a single gear (often 2nd or 3rd), a condition known as ‘limp mode’.
- ✔ The Check Engine Light or Transmission Warning Light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- ✔ A noticeable decrease in fuel efficiency as the transmission operates incorrectly.
- ✔ The transmission feels like it’s slipping, where engine RPMs increase without a corresponding increase in speed.
- ✔ Complete failure to shift, leaving you stranded.
The Definitive Solution: A VIN-Programmed Savana 1500 Transmission Module
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The biggest hurdle in replacing modern electronic modules is the need for expensive dealership programming. We eliminate that step entirely. By providing us with your vehicle’s VIN during checkout, we program the module with the latest GM software specific to your Savana 1500. This ensures that all shift points, torque converter lockup strategies, and diagnostic parameters are perfectly calibrated right out of the box. Your Savana 1500 Transmission Module will perform exactly as the factory intended, restoring the smooth and reliable performance you depend on.
Built to strict OEM standards, this T42 TCM, also known by service numbers 24242391, 24234503, and 24252114, is a direct replacement for a wide range of GM vehicles, including the Chevrolet Express, Silverado, Tahoe, GMC Sierra, Yukon, and many more equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E.
Simple, Straightforward Installation
You don’t need to be a master technician to complete this repair. The installation process is simple and typically takes less than 30 minutes. On the 2006-2014 Savana and Express vans, the TCM is conveniently located in the engine compartment on the right-hand side. Simply disconnect the vehicle’s battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Reconnect the battery, and you’re ready to go. Using a basic scan tool to clear any stored DTCs after installation is recommended for best results. With no core charge, you can keep your old part without the hassle of returns.
Frequently Asked Questions
What is VIN programming and why is it essential?
VIN programming loads your vehicle’s specific software and calibration files onto the module. This ensures the TCM communicates correctly with the engine computer and other systems, controlling shift points and pressures precisely for your Savana’s configuration. Without it, the transmission will not function correctly.
Do I need to visit a dealer after installing this part?
No. Because this module arrives pre-programmed to your VIN, no further dealership visits or expensive programming sessions are required. It is a true plug-and-play installation.
Where is the TCM located on my 2006-2014 Savana 1500?
On the Savana and Express vans, the Transmission Control Module is typically found in the engine compartment, mounted on the right-hand (passenger) side.
Will this module fix transmission error codes like P0700?
Yes. A P0700 code is a general fault code indicating the TCM has detected a problem. If the TCM itself is the source of the fault, replacing it with this programmed unit will resolve the code and the underlying issue. It also resolves many other specific solenoid and sensor codes caused by a failing module.
Is there a core charge for this Savana 1500 Transmission Module?
No, there is no core charge. You are not required to send your old, faulty module back to us, saving you time and shipping costs.