Restore Your Savana’s Transmission Performance
As a technician with over two decades of experience, I know that for a workhorse like the 2006-2014 GMC Savana 2500 Van, reliability isn’t just a feature—it’s essential for your livelihood. When the transmission starts acting up, it’s not just an inconvenience; it’s downtime that costs you money. Erratic shifting, getting stuck in gear, or a glowing check engine light are often symptoms of a failing Transmission Control Module (TCM). This T42 TCM, part number 24255280, is the direct-fit, dependable solution to get your van back on the road and working as hard as you do.
This isn’t a generic, one-size-fits-all part. We pre-program each module to your van’s specific Vehicle Identification Number (VIN) before it ships. This critical step ensures that the module communicates flawlessly with your vehicle’s engine computer and other systems right out of the box. You get optimal shift points, correct torque converter lockup, and accurate diagnostic reporting without needing an expensive trip to the dealership for programming. It’s a plug-and-play fix designed for both professional installers and savvy DIY owners.
Case Study: The Contractor’s Lifeline
A local plumber brought his 2011 Savana 2500 into my bay last month with a frustrating problem. His van would randomly refuse to shift out of 3rd gear, making him late for appointments. He was getting a generic P0700 code, but no specific solenoid faults. After checking the wiring and fluid, my experience pointed straight to the TCM. The internal electronics often fail from years of heat cycles under the hood. Instead of sending him to the dealer for a part that would take days to get and program, we ordered one of these pre-programmed T42 modules. It arrived the next day, I installed it in under 30 minutes, and his van was back on the road, shifting perfectly. He saved hundreds in diagnostic fees and, more importantly, avoided losing business.
Is Your Savana Van Showing These Transmission Red Flags?
A failing Savana 2500 Van TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle is stuck in “limp mode” (usually second or third gear).
- ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, or other solenoid circuit codes.
- ✔ Inability to upshift or downshift, leading to poor acceleration and terrible fuel economy.
- ✔ Complete loss of communication with the transmission, making the vehicle undrivable.
- ✔ The transmission feels like it’s slipping between gears.
Your Straightforward Guide to Installation
Replacing the TCM on your Savana is a job you can tackle with basic hand tools. For the 2006-2014 Savana 1500, 2500, and 3500 models, the module is conveniently located in the engine compartment on the right-hand (passenger) side, making it easily accessible.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the TCM: Open the hood and find the TCM on the passenger side of the engine bay. It’s a silver box with several large electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harnesses from the old module. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative 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 previous failure. Start the vehicle and test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. While it is the specified part for the 2006-2014 Savana 2500 Van TCM, it also fits many other models. Please verify your part number (24255280) or check the list below. Interchangeable part numbers include: 24252114, 24234503, 24230461, 24234274, 24256960, and more.
Partial Fitment List: Chevrolet Express/GMC Savana (2006-2014), Chevrolet Silverado/GMC Sierra (2007-2013), Chevrolet Tahoe/GMC Yukon (2007-2009), Chevrolet Impala (2006-2011), Pontiac G6 (2006-2010), Hummer H3 (2008-2010), and many more.
Frequently Asked Questions
Do I need to take my van to the dealer after installation?
No. This module comes pre-programmed to your vehicle’s VIN. It is a true plug-and-play solution, saving you the time and expense of dealership programming.
What information do you need to program the module?
We require your 17-digit Vehicle Identification Number (VIN) at checkout. This ensures we can load the correct factory software for your specific vehicle configuration.
Is this part difficult to install for a DIYer?
Not at all. For the Savana van, the TCM is located in an easy-to-reach spot in the engine bay. With basic hand tools, most people can complete the replacement in under 30 minutes.
Does this part come with a warranty?
Yes, this Transmission Control Module is backed by our one-year warranty, giving you peace of mind with your purchase.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module or dispose of it without the hassle of returning it.