Restore Your Truck’s 4×4 Capability Instantly
Is that frustrating “Service 4-Wheel Drive” message glaring at you from the dash of your Sierra Denali? Are you stuck in two-wheel drive, unable to shift the transfer case, or dealing with intermittent 4×4 engagement? You’ve come to the right place. As a technician with over two decades of experience under the hood of GM trucks, I’ve seen this exact issue countless times. The problem often isn’t a major mechanical failure in your transfer case, but a faulty Transfer Case Control Module (TCCM)—the electronic brain that commands your 4WD system.
This isn’t just a replacement part; it’s a complete, ready-to-install solution for your 2011-2014 Sierra Denali 2500 TCCM. We take all the guesswork and dealership hassle out of the equation. Simply provide us with your vehicle’s VIN during checkout, and our experts will program the module with the very latest GM software updates specific to your truck. It arrives at your door ready to be installed, saving you from expensive diagnostic fees and the dreaded programming appointment at a dealership.
From the Diagnostic Bay
I remember a 2013 Sierra 2500 that came into my shop. The owner was convinced he needed a new transfer case. His 4WD would sometimes engage, sometimes not, and the selector switch lights would flash randomly. He’d already spent money on a new switch with no luck. After a quick scan, I saw communication fault codes (U0102 – Lost Communication with TCCM). Instead of a multi-thousand-dollar mechanical repair, the fix was this exact module. We plugged in a pre-programmed unit, cleared the codes, and his 4WD system was operating perfectly in under 20 minutes. That’s the power of diagnosing the electronics first.
Is Your Truck Showing These Symptoms?
- ✔ “Service 4-Wheel Drive” or “Service 4×4” message on the instrument cluster.
- ✔ Inability to switch between 2WD, 4HI, and 4LO.
- ✔ Indicator lights on the 4WD selector switch are flashing or completely off.
- ✔ The 4×4 system seems to be stuck in one mode.
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as C0327, C0398, or various U-codes pointing to a loss of communication.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- ✔ Locate the TCCM: On most GM trucks of this era, the module is located on the driver’s side of the dashboard, typically above and to the left of the brake pedal, secured to a bracket. You may need to remove the lower dash knee bolster panel for access.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be depressed. Then, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed TCCM onto the bracket and securely plug in all the electrical connectors. You should hear a click as they lock into place.
- ✔ Reconnect and Test: Reinstall any panels you removed, then reconnect the negative battery terminal. Turn the ignition on (without starting the engine) and test the 4WD selector switch. The lights should illuminate correctly, and you should hear the transfer case motor engaging as you switch modes.
Guaranteed Fitment for Your GM Truck or SUV
This module, part number 24249095, is a direct replacement for a wide range of GM vehicles. It is also a compatible replacement for part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, and 24252878. Please confirm your vehicle is on the list below for a perfect fit:
- 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
- SIERRA DENALI 2500: 2011-2014
- SIERRA DENALI 3500: 2011-2014
- 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: 2008-2014
- SUBURBAN 2500: 2008-2013
- TAHOE: 2008-2014
- YUKON / YUKON XL 1500: 2007 (Denali), 2008-2014
- YUKON XL 2500: 2008-2013
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to load the correct, vehicle-specific software from GM. This ensures the TCCM communicates perfectly with your truck’s other computers (like the ECU and BCM) and that your 4WD system functions exactly as it did from the factory.
Is this really a plug-and-play installation?
Yes. Because we program the module before shipping it, you do not need any special scan tools or a trip to the dealer for programming. The physical installation is straightforward and can be done with basic hand tools by most DIY mechanics.
Will this fix my “Service 4WD” light?
In the vast majority of cases where the TCCM is the root cause, yes. This module is the most common failure point for the symptoms listed above. However, we always recommend a proper diagnosis to rule out other issues like a faulty transfer case encoder motor or selector switch, though these are less common.
What if I have a different part number on my old module?
This module replaces a long list of previous GM part numbers. As long as your vehicle model and year are on our compatibility list and your original part number is one of the ones listed (e.g., 24261367, 24243085, etc.), this part will work correctly for you.
Do I need to send my old part back?
No core charge or return is required for this part. You can recycle your old module locally.