Restore Smooth Shifting to Your GMC Savana Workhorse
Is your 2006-2014 GMC Savana 1500 van suffering from harsh shifts, delayed gear engagement, or getting stuck in limp mode? These are classic signs of a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, the TCM is responsible for every gear change. When it fails, it can sideline your vehicle and disrupt your work. This direct-fit T42 TCM, part number 24240449, is the reliable, no-hassle solution to get your van back on the road and running dependably.
Over my 20 years in the garage, I’ve seen countless work vans come in with these exact symptoms. The T42 module, especially in hardworking vehicles like the Savana, can fail due to heat cycles and constant electrical load. This isn’t just an inconvenience; a faulty TCM can lead to poor fuel economy, transmission overheating, and even long-term damage to mechanical components. Our solution provides a new lease on life for your transmission, ensuring it operates precisely as the manufacturer intended.
From the Diagnostic Bay
I remember a fleet manager bringing in a 2011 Savana 2500 that was driving his crew crazy. The van would shift perfectly for days, then suddenly start slamming into gear or refuse to shift out of 2nd. They’d already replaced a shift solenoid with no luck. After hooking up my scan tool, I noticed intermittent communication loss with the TCM. Instead of a hard fault, it was an electronic ghost. We installed one of our VIN-programmed T42 modules. The key was the pre-programming; it saved the client a full day of vehicle downtime and the extra cost of a dealership visit. The van was back in service that afternoon, and the shifting problems never returned.
Is Your Savana Van Showing These Symptoms?
- ✔ Harsh, erratic, or delayed shifting between gears.
- ✔ Transmission warning light or Check Engine Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) stored, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid Faults), or U0101 (Lost Communication with TCM).
- ✔ Vehicle is stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ A noticeable drop in fuel efficiency.
- ✔ The torque converter fails to lock up at highway speeds.
A Straightforward Guide to Installation
Replacing the 2006-2014 Savana 1500 TCM is a job most DIYers can handle in their own driveway in under 30 minutes. The module is conveniently located and requires no specialized tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the TCM: On most Savana and Express vans, you’ll find the TCM mounted in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly to avoid damaging them. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the electrical harnesses, ensuring they click into place.
- Reconnect and Verify: Reconnect the negative battery terminal. Start the vehicle and let it idle for a minute. Use a standard OBD2 scan tool to clear any lingering fault codes from the computer’s memory.
Verified Vehicle Compatibility
This module is a direct replacement for part number 24240449 and other interchangeable numbers. It is guaranteed to fit the following models, among many others equipped with the T42 TCM:
- GMC Savana 1500/2500/3500 Van (2006-2014)
- Chevrolet Express 1500/2500/3500 Van (2006-2014)
- Chevrolet Silverado & GMC Sierra (2007-2013, specific models)
- Chevrolet Tahoe, Suburban & GMC Yukon (2007-2009)
- Chevrolet Colorado & GMC Canyon (2008-2012)
- Hummer H3 (2008-2010)
- Buick LaCrosse, Lucerne (2006-2011)
- Cadillac DTS (2006-2011)
- Pontiac G6, Grand Prix (2006-2010)
Because this module is pre-programmed to your vehicle’s specific VIN, you can be confident in its performance and compatibility. By providing your VIN at checkout, you eliminate the need for expensive dealership flashing or programming tools, making this the most efficient solution for your 2006-2014 Savana 1500 TCM replacement.