Regain Control of Your 4×4 System Instantly
Is your 2011-2014 Sierra Denali 2500 flashing a ‘Service 4WD’ message? Are you unable to shift between 2WD, 4-High, or 4-Low? Don’t let a faulty Transfer Case Control Module (TCCM) leave you stranded. As the electronic brain of your four-wheel-drive system, the TCCM is responsible for interpreting your commands from the dash switch and engaging the transfer case motor. When it fails, you lose that critical capability, often due to internal electronic component breakdown or moisture damage over time.
This is the definitive, hassle-free solution. We provide a genuine OEM-spec TCCM, part number 24243084, that arrives at your door fully programmed with the latest GM software updates. All we need is your vehicle’s VIN at checkout. This crucial step eliminates the need for an expensive trip to the dealership for programming, saving you both time and money. Restore your truck’s off-road and all-weather confidence with a part that’s ready to install right out of the box.
From the Diagnostic Bay: The Intermittent 4WD Fault
I had a 2013 Sierra 2500 HD in the shop last month with a frustrating problem. The owner said the ‘Service 4WD’ light would come on randomly, and sometimes the selector switch would be completely unresponsive. Of course, when he brought it to me, the system was working perfectly. These intermittent electrical gremlins are the toughest to pin down. After checking the basics—connectors, wiring, and the switch itself—I hooked up my professional scan tool. I found a stored history code, U0102 – Lost Communication with Transfer Case Control Module. This told me the TCCM was intermittently dropping off the data network. Instead of just replacing parts, I monitored the data stream while wiggling the TCCM connectors. No change. This pointed to an internal failure in the module itself, likely a cold solder joint or failing processor that was sensitive to temperature and vibration. We replaced it with one of our VIN-programmed modules, and the problem was solved permanently. The customer avoided a costly dealership visit where they might have recommended a much more expensive repair.
Is Your Truck Exhibiting These 4WD Faults?
- ✔ ‘Service 4WD’ or ‘Service Four Wheel Drive’ message illuminated on the instrument cluster.
- ✔ Inability to shift the transfer case into or out of 4HI, 4LO, or 2WD.
- ✔ 4×4 selector switch lights are flashing or do not illuminate at all.
- ✔ The truck feels stuck in one drive mode, regardless of switch position.
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as U0102, C0327, or other C-series and U-series codes related to the transfer case.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- ✔ Locate the Module: The TCCM is typically located on the driver’s side, up under the dashboard to the left of the steering column. You may need to remove a lower dash 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 the module from its mounting bracket.
- ✔ Install the New Module: Bolt the new, pre-programmed TCCM into place. Securely plug in the electrical connectors until they click.
- ✔ Final Steps: Reinstall any trim panels you removed. Reconnect the negative battery terminal. Start the vehicle and test the 4WD selector switch to confirm proper operation.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM trucks and SUVs. It is compatible with the following part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, and 24252878. Please confirm your vehicle is on the list below:
- 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: 2007-2014
- YUKON XL 2500: 2008-2013
Frequently Asked Questions
Why do you need my VIN to program the module?
Your vehicle’s VIN (Vehicle Identification Number) allows us to load the exact, correct software calibration from GM for your specific truck’s options. This ensures perfect communication between the TCCM and other vehicle systems, guaranteeing proper function without any additional programming required.
Is this part truly ‘plug-and-play’?
Yes. Because we program it to your VIN before shipping, it arrives ready for installation. Simply remove the old module and install this one. There is no need for a scan tool or a trip to the dealership for programming, which is typically required for un-programmed modules.
Will this fix the ‘Service 4WD’ light on my dashboard?
In the vast majority of cases, a failing TCCM is the direct cause of the ‘Service 4WD’ warning. Replacing a faulty module with this pre-programmed unit is the most common and effective repair for this specific issue.
Where is the TCCM located on my 2011-2014 Sierra Denali 2500?
The TCCM is located inside the cabin, under the driver’s side dashboard. It is typically mounted to a bracket to the left of the steering column.
What happens if I install this without providing a VIN?
We cannot ship the module without your VIN. The programming is an essential part of the service we provide. An un-programmed module will not function correctly in your vehicle.