Get Your Work Van Back on the Road with a Reliable Transmission Fix
If your 2006-2014 GMC Savana 3500 work van is experiencing unpredictable shifting, getting stuck in gear, or throwing transmission codes, the problem is often a failing Transmission Control Module (TCM). As the brain of your automatic transmission, a faulty TCM can bring your operations to a halt, costing you time and money. This OEM-quality T42 TCM, part number 24243901, is the definitive solution to restore your van’s performance and reliability. It arrives expertly programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and ensuring a true plug-and-play installation.
Case Study: A Tricky Diagnosis
I had a fleet customer bring in a 2011 Savana 3500 with a complaint that stumped two other shops: intermittent, bone-jarring shifts and occasionally getting stuck in 3rd gear (limp mode) but with no consistent check engine light. They had already replaced two shift solenoids to no avail. After hooking up my scan tool and monitoring live data, I saw the TCM was intermittently dropping communication. This is a classic sign of internal electronic failure that won’t always set a hard code. Instead of a costly transmission rebuild, we installed one of our VIN-programmed T42 modules. The installation took less than 20 minutes. The result? The van was back in service the same day with smooth, predictable shifting, and the fleet manager was relieved to avoid a multi-thousand-dollar repair bill.
Is Your Savana Van Exhibiting These Transmission Problems?
A failing TCM can manifest in several ways. If you’re noticing any of the following issues, it’s a strong indicator that your module needs replacement. Ignoring these signs can lead to more severe transmission damage.
- ✔ Harsh, erratic, or delayed gear shifts that disrupt driving.
- ✔ The vehicle is stuck in a single gear, often referred to as “limp mode.”
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ A noticeable decrease in fuel economy due to inefficient shifting.
- ✔ The transmission feels like it’s slipping between gears or failing to engage properly.
A Straightforward Guide to Installation
One of the key benefits of this module is its simple, direct-fit installation. You don’t need to be a master mechanic to get this job done, and it typically takes less than 30 minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the Module: On the 2006-2014 Savana 3500 Van, the TCM is located in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount the new, pre-programmed TCM in the same location and securely fasten it. Reconnect the electrical connectors, 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 transmission codes to ensure a clean slate for the new module.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. It is an interchangeable replacement for part numbers 24252114, 24234503, 24243901, and more. Please verify your vehicle’s fitment below:
Fits Models Including:
- GMC Savana 1500/2500/3500 Van (2006-2014)
- Chevrolet Express 1500/2500/3500 Van (2006-2014)
- Chevrolet Silverado & GMC Sierra Pickups (Check specific years/options)
- Chevrolet Tahoe, Suburban, Avalanche (Check specific years/options)
- Cadillac, Buick, Pontiac, Saturn, Hummer, and Saab models (See full list for details)
Frequently Asked Questions
Frequently Asked Questions
Is this part ready to install right out of the box?
Yes. This Transmission Control Module is fully programmed to your vehicle’s VIN before shipping. This means it is a true plug-and-play solution, requiring no additional programming or trips to the dealership, saving you significant time and money.