Restore Your Van’s Drivability and Reliability
If you’re a contractor, fleet manager, or DIYer relying on your GMC Savana 3500, you know that transmission trouble means downtime and lost money. Erratic shifting, a check engine light that won’t go away, or a van stuck in limp mode can bring your work to a halt. As a technician with over two decades of experience, I’ve seen countless GM vehicles, especially workhorses like the Savana, sidelined by a failed Transmission Control Module (TCM). This isn’t just an inconvenience; it’s a critical failure that compromises safety and performance. This T42 TCM, part number 24240449, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play repair.
Case Study: The Intermittent Work Van
I once had a 2011 Savana 3500 work van in my bay that was a real head-scratcher. The owner, a plumber, said it would randomly slam into gear or refuse to shift out of 2nd, but only after it was hot. He’d already replaced two shift solenoids at another shop with no luck. The DTCs were intermittent, mostly a generic P0700. After checking the wiring and fluid, I suspected the TCM. Heat soak was likely causing an internal failure. We installed a pre-programmed T42 module, and the problem vanished instantly. This is a classic failure mode for the 2006-2014 Savana 3500 TCM, and a pre-flashed module saved my customer hours of labor and the cost of a dealership visit.
Is Your Savana Van Exhibiting These Transmission Faults?
A failing TCM sends clear signals. Ignoring them can lead to more severe and expensive transmission damage. If you’re experiencing any of the following, it’s time to inspect your TCM:
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle is stuck in a single gear (often called “limp mode”).
- ✔ An illuminated Check Engine Light or Transmission Warning Light with codes like P0700, P0751, P0756, or other solenoid-related faults.
- ✔ Inability to upshift or downshift, leading to poor acceleration and terrible fuel economy.
- ✔ Complete loss of communication with the transmission, making it unresponsive.
A Straightforward Guide to Installation
One of the best features of this module is its simple installation. You don’t need specialized dealer equipment. For the GMC Savana or Chevrolet Express van, the process is particularly accessible.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the Module: On the 2006-2014 Savana/Express vans, the TCM is typically mounted in the engine compartment on the right-hand (passenger) side. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the electrical harnesses. Then, unbolt the module from its mounting bracket. There are usually just a few bolts holding it in place.
- Install the New TCM: Mount the new, pre-programmed TCM onto the bracket and securely fasten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the ECU. Start the vehicle and test drive to confirm smooth shifting.
Why Choose Our Pre-Programmed 2006-2014 Savana 3500 TCM?
This isn’t just a replacement part; it’s a complete repair solution. By programming the module to your VIN before shipping, we eliminate the most difficult and expensive step of the repair process. The software is loaded with the latest GM updates, often correcting factory flaws that may have contributed to the original failure. Built to meet or exceed OEM specifications and backed by a one-year warranty, this module ensures long-term reliability for your hard-working van.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24240449 and other service numbers across a wide range of GM vehicles. While this page focuses on the Savana 3500, it is also compatible with the following models. Always verify your part number for a perfect match.
- GMC Savana 1500/2500/3500 Van (2006-2014) – RH engine compartment
- Chevrolet Express 1500/2500/3500 Van (2006-2014) – RH engine compartment
- Chevrolet Silverado & GMC Sierra (2007-2013) – Next to battery
- Chevrolet Tahoe/Suburban & GMC Yukon (2007-2009) – Next to battery
- Chevrolet Colorado & GMC Canyon (2008-2012) – RH rear engine compartment
- Cadillac DTS (2006-2011) – RH front engine compartment
- Buick LaCrosse / Lucerne (2006-2011) – Varies by engine
- Chevrolet Impala / Monte Carlo (2006-2011) – Lower air cleaner housing
- Pontiac G6 / Grand Prix (2006-2010) – LH strut tower
- And many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Frequently Asked Questions
How do I provide my VIN for programming?
After placing your order, you will be prompted to enter your vehicle’s 17-digit VIN. We cannot ship the module until we receive this information, as the programming is specific to your van.
Will this fix my van being stuck in limp mode?
Yes, in most cases. Limp mode is a common symptom of a failed TCM. When the module can no longer properly control the solenoids, the vehicle’s computer defaults to a single gear to prevent further damage. Replacing it with this programmed unit should restore full shifting capabilities.
Is this part difficult to install for a DIYer?
Not at all. For a Savana van, it’s one of the easier electronic components to replace. It’s located in the engine bay and requires only basic hand tools. The entire job can typically be completed in under 30 minutes.
What is the difference between this and a part from the dealership?
The main difference is convenience and cost. A dealership will sell you a blank module, requiring you to have the vehicle towed to them for an expensive programming service. Our module arrives ready for installation, saving you time, towing fees, and labor charges.
Does this part require a core charge?
No, there is no core charge for this TCM. You can keep your old part, eliminating the hassle and expense of shipping it back.