Restore Peak Performance to Your Workhorse Van
If your 2006-2014 GMC Savana 1500 is experiencing erratic shifting, getting stuck in gear, or throwing transmission codes, the problem is often a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, the TCM is responsible for every gear change. When it malfunctions, it can make your reliable work van feel unpredictable and unsafe. 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.
From the Diagnostic Bay: The Intermittent Limp Mode Case
I remember a fleet manager bringing in a 2011 Savana 1500 that was a nightmare for his drivers. It would randomly go into limp mode (stuck in 3rd gear) with no warning, but after shutting it off and restarting, it would work fine for a day or two. There were no hard-set solenoid codes, just a generic P0700 (Transmission Control System Malfunction). We checked the wiring and fluid, which were perfect. Experience pointed to the TCM. Heat cycles and constant vibration in the engine bay had likely caused microscopic cracks in the circuit board. We installed one of our VIN-programmed T42 modules, and the problem vanished instantly. The van was back in service the same afternoon, saving the business from costly downtime.
Is Your Savana Exhibiting These Telltale Symptoms?
A faulty TCM doesn’t always mean total transmission failure. Often, the signs are subtle at first. If you’re a professional mechanic or a savvy DIYer, look for these classic indicators of a failing module before it leaves you stranded.
- ✔ Harsh, clunky, or delayed gear shifts.
- ✔ The vehicle is stuck in “limp mode,” often in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults are present.
- ✔ Inability to upshift or downshift properly.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ The torque converter fails to lock up at highway speeds.
Your Straightforward 30-Minute Installation Guide
Replacing the 2006-2014 Savana 1500 TCM is a job most people can handle with basic tools. Because this module is pre-programmed, you eliminate the need for an expensive trip to the dealership.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the Savana and Express vans, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note the locking tabs to avoid damage. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Mount the new module securely onto the bracket and firmly reconnect the electrical harnesses until 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 vehicle’s memory. Start the engine and test drive to confirm smooth shifting.
Verified Vehicle Compatibility List
This T42 TCM is a direct replacement for part number 24240449 and other service numbers. It is guaranteed to fit the following vehicles, among many others in the GM family. Please verify your specific model and location notes.
- SAVANA 1500 VAN 06-14 Transmission; (RH engine compartment)
- EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
- SAVANA 2500/3500 VAN 06-14 Transmission; (RH engine compartment)
- SIERRA 1500 PICKUP 07-13 Transmission; (next to battery)
- SILVERADO 1500 PICKUP 07-13 Transmission; (next to battery)
- TAHOE / YUKON 07-09 Transmission; (next to battery)
- SUBURBAN 1500 / YUKON XL 1500 07-08 Transmission; (next to battery)
- IMPALA 06-11 Transmission; (lower air cleaner housing)
- HHR 06-11 Transmission; (LH engine compartment)
- And many more models listed in the fitment data.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for immediate installation, saving you time and money.
Is this a difficult part to install myself?
Not at all. For most vehicles, including the Savana van, it’s a simple bolt-off, bolt-on process in the engine bay that takes less than 30 minutes with basic hand tools.
How can I be sure the TCM is the problem and not the transmission itself?
While a full diagnosis is best, common clues point to the TCM: electrical-related codes (like P0700), intermittent problems that resolve on restart, or shifting issues without any mechanical noises like grinding or slipping from the transmission.
What is your warranty policy?
This module is backed by our one-year, hassle-free warranty, giving you confidence and peace of mind in your repair.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep or dispose of your old module without any extra steps.