Programmed 2006-2014 Savana 1500 Van TCM 24255280 | T42 Module

Restore Peak Transmission Performance to Your Workhorse Van

If you rely on your GMC Savana 1500 for work or transport, you can’t afford the downtime that comes with a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can bring a perfectly good work van to a grinding halt. Symptoms like harsh, unpredictable shifting, getting stuck in “limp mode,” or a persistent Check Engine Light can disrupt your day and cost you money. This isn’t just an inconvenience; it’s a critical failure that compromises your van’s reliability and safety.

This T42 TCM, part number 24255280, is the definitive solution for your 2006-2014 Savana 1500 Van TCM issues. It’s not just a replacement part; it’s a complete, ready-to-install fix. We pre-program each module to your vehicle’s specific VIN, loading it with the latest GM software updates. This crucial step eliminates the need for an expensive trip to the dealership for programming, saving you both time and hundreds of dollars. Once installed, it precisely manages shift points, torque converter clutch engagement, and line pressure, restoring the smooth, dependable operation you expect from your 4L60E or 4L65E transmission.

Diagnosing a Faulty 2006-2014 Savana 1500 Van TCM

A failing TCM can mimic other transmission problems, so accurate diagnosis is key. In my shop, the most common indicators are electronic, not mechanical. If you’re experiencing erratic shifting combined with diagnostic trouble codes (DTCs) that won’t clear or that point to multiple solenoid failures simultaneously, the TCM is the likely culprit. Heat and vibration are the primary enemies of these modules, causing internal solder joints and components to fail over time. This replacement module is built to OEM specifications to withstand these conditions and provide a lasting repair.

Is Your Savana Exhibiting These Transmission Faults?

• ✔ Harsh, slamming shifts or delayed gear engagement.
• ✔ Vehicle is stuck in a single gear (often 2nd or 3rd) and will not shift up or down.
• ✔ The Check Engine Light or a transmission-specific warning light is illuminated.
• ✔ Your scan tool shows codes like P0700, P0750, P0753, P0758, or other solenoid-related faults.
• ✔ Poor fuel economy and a feeling of sluggish performance.
• ✔ Complete loss of communication with the transmission module.

A Straightforward Guide to Installation

1. ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
2. ✔ Locate the TCM: On the 2006-2014 Savana Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
3. ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Use a socket wrench to remove the bolts or nuts securing it to its bracket.
4. ✔ Install the New Module: Mount the new, pre-programmed TCM in the same location and secure it with the original hardware. Reconnect the electrical connectors, ensuring they click firmly into place.
5. ✔ Final Steps: Reconnect the battery terminal. Start the vehicle and use a scan tool to clear any stored DTCs from the engine control module (ECM). Test drive to confirm smooth shifting.

Verified Vehicle Compatibility

This module is a direct fit for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this page focuses on the Savana 1500, it is also compatible with the following models. Always verify by part number or by contacting us with your VIN.

• GMC Savana / Chevrolet Express 1500, 2500, 3500 (2006-2014)
• GMC Sierra / Chevrolet Silverado 1500, 2500 (2007-2013)
• GMC Yukon / Chevrolet Tahoe / Suburban (2007-2009)
• Chevrolet Impala (2006-2011)
• Chevrolet HHR (2006-2011)
• Chevrolet Colorado / GMC Canyon (2008-2012)
• Buick LaCrosse / Allure (2006-2009)
• Cadillac DTS (2006-2011)
• Hummer H3 (2008-2010)
• And many more GM models from 2006-2014.