Restore Control Over Your Truck’s 4WD System
If you’re staring at a persistent “Service 4WD” light on your 2011-2014 Sierra Denali 2500, or if your truck refuses to shift into or out of four-wheel drive, you’ve likely pinpointed the culprit: a failed Transfer Case Control Module (TCCM). This essential component is the electronic brain of your 4×4 system, and when it fails, it can leave you stranded in the wrong drive mode at the worst possible time. Don’t let a faulty module compromise your truck’s capability and your safety. This direct-replacement TCCM is the reliable, no-hassle solution you need.
We take the guesswork and dealership expense out of the equation. Unlike a generic part from a big-box store, we program this module specifically for your truck using your Vehicle Identification Number (VIN). This ensures it arrives with the latest GM software updates, ready for a true plug-and-play installation. This critical step prevents the communication errors and compatibility problems that plague un-programmed modules, getting your heavy-duty Sierra back to full operational strength quickly and correctly.
From the Diagnostic Bay
I remember a customer with a ’12 Sierra 2500 who brought his truck in, completely frustrated. He used it for hauling a fifth-wheel, and it was stuck in 4-Lo. He couldn’t go over 20 mph. His previous mechanic had replaced the transfer case shift motor, but the problem remained. A quick scan showed a U0102 code—Lost Communication with TCCM. The module wasn’t just failing; it was completely offline. Water intrusion from a leaky windshield seal had corroded the board. We installed one of these pre-programmed modules, and within 15 minutes of it arriving, the truck was shifting perfectly through all ranges. It’s a textbook example of how a small electronic box can sideline a powerful truck, and why having a correctly programmed replacement is non-negotiable.
Is Your Truck Showing These Symptoms?
A failing TCCM often gives clear warning signs. If you’re experiencing any of the following, this module is the likely solution:
- ✔ “Service 4WD” or “Service Four Wheel Drive” message on the dash information center.
- ✔ Inability to switch between 2WD, 4-Hi, 4-Auto, and 4-Lo.
- ✔ The 4WD selector switch lights blink but never stay solid.
- ✔ The vehicle is stuck in one drive mode (e.g., stuck in 4WD).
- ✔ Diagnostic Trouble Codes (DTCs) such as C0327, C0398, or U0102 are present.
A Straightforward Guide to Installation
Installing your new 2011-2014 Sierra Denali 2500 TCCM is a job most DIYers can handle in under 30 minutes with basic tools. Since it comes pre-programmed, no special electronic tools are needed.
- 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 release tabs that need to be pressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed TCCM in the same location and securely plug in the electrical connectors. You’ll hear a click as they lock into place.
- Final Steps: Reinstall any dash panels you removed and reconnect the negative battery terminal. Start the truck and test the 4WD selector switch to confirm proper operation.
Guaranteed Fitment for Your GM Truck or SUV
This module, part number 24239190, is a direct replacement for a wide range of GM vehicles. It is also a compatible replacement for part numbers: 24261367, 12588096, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, and 24252878. Please verify your vehicle is on the list below:
- AVALANCHE 1500: 2008-2013
- SIERRA 1500 PICKUP: 2007 (New Body Style, Opt NQH), 2008-2013
- SIERRA 2500 PICKUP: 2007 (New Body Style, Opt NQF), 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, Opt NQH), 2008-2013
- SILVERADO 2500 PICKUP: 2007 (New Body Style, Opt NQF), 2008-2014
- SILVERADO 3500 PICKUP: 2007 (New Body Style), 2008-2014
- SUBURBAN 1500/2500: 2008-2014/2008-2013
- TAHOE: 2008-2014
- YUKON & YUKON XL 1500/2500: 2007-2014
Frequently Asked Questions
What is a TCCM and what does it do?
The TCCM, or Transfer Case Control Module, is a small computer that acts as the brain for your vehicle’s four-wheel-drive system. It reads input from the driver’s selector switch and commands the transfer case shift motor to engage or disengage the 4WD system.
Why do you need my VIN to program the module?
Every GM truck has specific software and calibrations based on its options (engine, transmission, axle ratio). Programming the module with your VIN ensures it has the exact software your truck needs to function correctly, preventing communication errors and ensuring seamless operation.
Is this part truly plug-and-play?
Yes. Because we pre-program the module to your VIN, it requires no additional programming or dealer visits after installation. Simply install it, and your 4WD system should be fully functional again.
Where is the TCCM located on my 2012 Sierra Denali 2500?
On most 2011-2014 GM HD trucks, the TCCM is mounted under the driver’s side of the dashboard, to the left of the steering column. Access typically requires removing the lower knee bolster panel.
Will this fix my ‘Service 4WD’ light?
In the vast majority of cases, a faulty TCCM is the direct cause of the ‘Service 4WD’ warning. If you are also experiencing issues with shifting between drive modes, this module is the most probable solution to clear the light and restore function.