Restore Your Truck’s Four-Wheel Drive Capability Instantly
Is the dreaded “Service 4WD” message glaring at you from the dashboard of your Sierra Denali? Are you unable to shift between 2WD, 4HI, or 4LO, leaving you stuck in one mode? You’re not alone. The Transfer Case Control Module (TCCM) is the electronic brain of your truck’s 4×4 system, and when it fails, it can sideline your vehicle’s all-terrain and all-weather capabilities. This isn’t just an inconvenience; it’s a matter of reliability and safety, especially when you depend on your truck for heavy-duty work or navigating challenging conditions.
We offer a direct, hassle-free solution: a genuine GM TCCM, part number 24239190, that arrives at your door fully programmed to your truck’s specific Vehicle Identification Number (VIN). We load it with the latest GM-approved software, ensuring seamless communication with your truck’s other systems right out of the box. Forget about expensive dealership visits, programming fees, and vehicle downtime. This is the definitive fix that gets your heavy-duty truck back to full function.
A Technician’s Notebook
I remember a 2012 Silverado 2500HD that came into the shop with the classic “Service 4WD” light and no response from the selector switch. The owner had already replaced the expensive transfer case encoder motor on a friend’s advice, but the problem persisted. After a quick scan, I pulled a U0102 code—Lost Communication with Transfer Case Control Module. In my 20+ years of experience, I’ve seen this dozens of times. While encoder motors can fail, a communication code almost always points to the module itself. Moisture intrusion from a leaky seal or simple electronic failure over time is a common culprit. We installed one of our VIN-programmed TCCMs, and within 15 minutes, the 4WD system was fully operational. The customer saved hundreds by avoiding a misdiagnosis and a trip to the dealer for programming.
Is Your Truck Exhibiting These 4WD Faults?
A failing TCCM can cause a range of frustrating symptoms. If you’re experiencing any of the following, this module is the likely solution:
- ✔ “Service 4WD” or “Service Four Wheel Drive” message on the instrument cluster.
- ✔ Inability to switch between 2WD, 4HI, and 4LO modes.
- ✔ The 4WD selector switch lights are off, flashing, or indicate the wrong mode.
- ✔ Diagnostic Trouble Codes (DTCs) such as U0102, C0306, C0321, or C0327 stored in the system.
- ✔ A grinding or clunking noise when attempting to shift the transfer case.
A Straightforward Guide to TCCM Installation
This is a job most DIYers can handle with basic tools. The TCCM is typically located on the driver’s side, attached to a frame rail or crossmember under the truck. Always consult a service manual for your specific vehicle’s location.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: Find the old TCCM. It’s a small black box with several electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harnesses. They have locking tabs that need to be depressed. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCCM into place. Securely plug in the electrical connectors, ensuring they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the truck and test the 4WD selector switch to confirm proper operation through all modes. The “Service 4WD” light should be gone.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM trucks and SUVs. Please verify your vehicle is on the list below. This part is compatible with and replaces part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, and 24252878.
- GMC Sierra Denali 3500: 2011-2014
- GMC Sierra & Silverado (1500, 2500, 3500): 2007 (New Body Style) – 2014
- GMC Sierra Denali & Denali 2500: 2007-2014
- Chevrolet Avalanche 1500: 2008-2013
- Chevrolet Suburban & GMC Yukon XL (1500, 2500): 2008-2014
- Chevrolet Tahoe & GMC Yukon: 2007-2014
Frequently Asked Questions
Do I need to do any programming or take this to a dealer?
Absolutely not. The main benefit of our service is that we program the module to your vehicle’s VIN before we ship it. This makes the installation truly plug-and-play, saving you time and the high cost of dealership programming.
How do I provide my VIN?
After you complete your purchase, you will need to send us a message with your 17-digit VIN. We cannot ship the module until we have this information to perform the programming.
Where is the TCCM located on my 2011-2014 Sierra Denali 3500?
On most 2011-2014 GM HD trucks, the Transfer Case Control Module is mounted to a crossmember or the frame rail on the driver’s side of the vehicle, underneath the cab. It’s a black plastic box with multiple wiring harnesses connected to it.
Will this fix my “Service 4WD” light?
In the vast majority of cases where the TCCM has failed (often indicated by communication codes or no response from the switch), this module is the correct and complete fix to extinguish the warning light and restore function.
Is this a new or used part?
This is a high-quality, inspected, and tested used OEM part that has been professionally programmed with the latest software for your vehicle, ensuring reliable performance and perfect fitment.