Restore Full Control Over Your Truck’s 4×4 System
If you’re staring at a persistent “Service 4WD” light on your 2007-2014 Sierra 3500’s dashboard, or if your four-wheel drive selector switch has become unresponsive, you’ve likely pinpointed the culprit: a failed Transfer Case Control Module (TCCM). As a technician with over two decades of experience, I’ve seen this exact issue countless times. The TCCM is the brain of your 4×4 system, and when it fails, it can leave you stuck in one mode, unable to engage 4HI for a snowy road or 4LO for a tough job site. This isn’t just an inconvenience; it’s a compromise on your truck’s capability and your safety.
This is a direct-replacement TCCM, part number 24240487, that arrives at your door ready for installation. The biggest hurdle with module replacement is typically the expensive and time-consuming trip to the dealership for programming. We eliminate that step entirely. Simply provide us with your vehicle’s VIN during checkout, and our experts will program the module with the latest official GM software specific to your Sierra 3500. This ensures seamless communication with your truck’s other systems and restores functionality right out of the box.
Case Study: A Tricky Diagnosis
A customer brought in his ’11 Sierra 2500 HD, frustrated because his truck was completely unresponsive to the 4WD switch and the “Service 4WD” light was on. He’d already replaced the encoder motor on the transfer case, assuming it was a mechanical issue. When we scanned it, we pulled a U0102 code—Lost Communication with Transfer Case Control Module. Instead of a wiring nightmare, the fix was simple. We swapped in a pre-programmed TCCM. In under 30 minutes, the code was gone, the switch worked perfectly, and the customer was back on the road, having saved hundreds on diagnostic time and a dealer visit.
Is Your Truck Showing These 4WD Warning Signs?
A failing TCCM can manifest in several ways. If you’re experiencing any of the following, this module is the most likely solution for your 2007-2014 Sierra 3500 TCCM problems:
- âś” “Service 4WD” or “Service Four Wheel Drive” message is illuminated on the instrument cluster.
- âś” The 4WD selector switch lights are off or flash intermittently without engaging the system.
- âś” Inability to switch between 2WD, 4HI, and 4LO modes.
- âś” The truck feels like it’s stuck in 4WD, causing binding or hopping during tight turns on dry pavement.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as U0102 (Lost Communication with TCCM), C0306 (Motor A/B Circuit), or C0327 (Encoder Circuit Malfunction).
A Straightforward Guide to Installation
Replacing the TCCM is a job most DIYers can handle with basic tools. It’s typically located under the driver’s side of the dashboard, to the left of the steering column. Follow these steps for a successful installation:
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the Module: Remove the lower dash panel beneath the steering wheel. You will see the TCCM, a small black box with several electrical connectors, mounted to a bracket.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed TCCM into place. Securely plug in all the electrical connectors, ensuring they click into place.
- Final Steps: Reinstall the lower dash panel and reconnect the negative battery terminal. Start your truck and test the 4WD selector switch to confirm proper operation.
Will This Fit My Truck?
This module is a guaranteed fit for a wide range of GM trucks and SUVs. While this page focuses on the 2007-2014 Sierra 3500 TCCM, please verify your vehicle in the list below. This part is a direct replacement for multiple part numbers, including 24261367, 12588096, 24239190, and more.
- AVALANCHE 1500: 2008-2013
- SIERRA 1500 PICKUP: 2007 (New Body Style), 2008-2013
- SIERRA 2500 PICKUP: 2007 (New Body Style), 2008-2014
- SIERRA 3500 PICKUP: 2007 (New Body Style), 2008-2014
- SIERRA DENALI: 2007-2010, 2011-2014 (2500/3500)
- SILVERADO 1500 PICKUP: 2007 (New Body Style), 2008-2013
- SILVERADO 2500 PICKUP: 2007 (New Body Style), 2008-2014
- SILVERADO 3500 PICKUP: 2007 (New Body Style), 2008-2014
- SUBURBAN 1500/2500: 2008-2014
- TAHOE: 2008-2014
- YUKON & YUKON XL: 2007-2014
Frequently Asked Questions
What exactly does the TCCM do?
The Transfer Case Control Module (TCCM) is a small computer that acts as the command center for your truck’s four-wheel-drive system. It takes your input from the dash switch and sends signals to the transfer case encoder motor to shift the vehicle into and out of 2WD, 4HI, and 4LO.
Do I really need to provide my VIN?
Yes, this is a critical step. Your VIN allows us to load the precise software calibration for your truck’s specific options (engine, transmission, axle ratio). This ensures the TCCM works perfectly upon installation and prevents communication errors with other vehicle systems.
Is this part difficult to install myself?
Not at all for most people with basic mechanical skills. It’s a plug-and-play part located under the driver’s side dashboard. No special tools are required, and since we program it for you, there’s no need for a scan tool or a trip to the dealer afterward.
Will this clear my ‘Service 4WD’ light?
In the vast majority of cases where the TCCM is the source of the fault, yes. Once the faulty module is replaced with this functional, programmed unit, the system will perform its self-check, and the warning light should turn off.
What if I have a different part number on my old module?
This module is compatible with a wide range of original GM part numbers, including 24261367, 12588096, 24239190, 24240487, and many others listed in the description. As long as your vehicle is on the fitment list, this module will work as a direct replacement.