Is Your Work Van Sidelined with Shifting Problems?
If you rely on your 2006-2014 GMC Savana 3500 for work, you know that downtime is lost money. When the transmission starts acting upโslamming into gear, refusing to shift, or putting the van into limp modeโit’s a major problem. Over my 20+ years in the shop, I’ve seen countless work vans like the Savana, Express, and Silverado roll in with these exact issues. More often than not, the culprit isn’t a catastrophic internal failure, but a faulty Transmission Control Module (TCM). This small electronic brain, the T42 model in this case, is responsible for every shift, and when it fails, your van’s reliability disappears.
The Direct-Fit, No-Hassle Solution
This isn’t just a replacement part; it’s a complete solution. We send you a high-quality T42 TCM that is pre-programmed to your Savana 3500’s specific Vehicle Identification Number (VIN). This means you can skip the expensive trip to the dealership for programming. It arrives ready to install, loaded with the latest GM software updates to ensure perfect communication with your vehicle’s powertrain and restore the smooth, predictable shifting you depend on.
Common Symptoms of a Failing 2006-2014 Savana 3500 Transmission Control Module
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s highly likely your module is the problem:
- โ Harsh, banging shifts or delayed gear engagement.
- โ The vehicle is stuck in one gear (often 2nd or 3rd) and won’t shift up or down.
- โ Check Engine Light or Transmission Warning Light is on with codes like P0700 (Transmission Control System Malfunction) or various solenoid codes (P0750-P0758).
- โ Complete loss of communication with the TCM, preventing diagnostics.
- โ Poor fuel economy and a feeling of sluggish performance.
Expert Pro Tip: Check Your Connectors First!
Before you condemn your old TCM, take a moment to inspect the large electrical connector that plugs into it. Over years of heat cycles and vibration, especially on a hardworking Savana van, the pins can get corroded or even back out slightly. I’ve seen cases where simply cleaning the connector with a good electronic cleaner and ensuring all pins are seated firmly resolved the issue. It’s a 5-minute check that could save you a lot of diagnostic headaches.
Plug-and-Play Installation: Get Back on the Road Fast
Replacing the TCM on your Savana 3500 is a straightforward job you can do in your own driveway in under 30 minutes. No specialized tools are required.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the TCM: On the Savana and Express vans, the TCM is typically found in the engine compartment on the right-hand (passenger) side, mounted near the firewall or inner fender.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place. Securely plug in the electrical connectors until they click.
- Reconnect and Verify: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, it’s a good practice to clear any stored diagnostic trouble codes (DTCs).
Guaranteed Compatibility and Reliability
This module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. It is interchangeable with numerous part numbers, including 24235340, 24252114, 24234503, 24230461, 24234274, and more. Backed by our one-year warranty and expert support, you can purchase with confidence, knowing you’re getting a dependable part that solves the problem correctly the first time.