Restore Full Control Over Your Truck’s 4WD System
Is your Sierra Denali flashing a stubborn “Service 4WD” light? Are you unable to switch between 2WD and 4WD, leaving you unprepared for bad weather or tough terrain? You’re dealing with a classic symptom of a failed Transfer Case Control Module (TCCM). As the electronic brain of your four-wheel-drive system, its proper function is critical. This replacement TCCM, part number 24261367, is the definitive solution, arriving at your door fully programmed with the latest GM software updates for your specific vehicle. Simply provide your VIN at checkout, and we handle the rest, saving you a costly trip to the dealership for programming.
Case Study: A Tricky 4×4 Diagnosis
A customer brought his 2012 Sierra 2500 into my shop last winter, frustrated because his 4WD would engage sometimes, but not others. The selector switch lights would flash and then go out. Most people immediately suspect the transfer case encoder motor, and he had already replaced it himself with no luck. When I hooked up my professional scan tool, I wasn’t getting a specific encoder motor fault, but instead a U0102 code—Lost Communication With Transfer Case Control Module. After checking the wiring and connectors for corrosion (a common issue), everything looked clean. The TCCM itself was the culprit. It was failing intermittently, unable to command the motor to shift. We installed one of these pre-programmed modules, and the 4WD system came back to life instantly. It’s a fix I’ve performed hundreds of times; this module solves the problem at its source.
Is Your Truck Showing These Symptoms?
- ✔ “Service 4WD” or “Service Four Wheel Drive” message on the instrument cluster.
- ✔ Inability to shift the transfer case into 4-High, 4-Low, or back to 2-High.
- ✔ Selector switch lights flash but do not stay solid when a mode is selected.
- ✔ The 4WD system is stuck in one mode, regardless of switch position.
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as U0102 (Lost Communication with TCCM).
- ✔ Audible clicking or grinding from the transfer case area with no successful shift.
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 of the dashboard, mounted to a metal bracket up and to the left of the steering column. You may need to remove the 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 pressed. Then, remove the nuts or bolts securing the TCCM to its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed TCCM onto the bracket and secure it with the original hardware. Reconnect the electrical connectors, ensuring they click firmly into place.
- ✔ Final Steps: Reinstall the lower dash panel and reconnect the negative battery terminal. Start the vehicle and test the 4WD selector switch to confirm proper operation through all modes.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of GM trucks and SUVs. While this listing focuses on the 2011-2014 Sierra Denali 2500 TCCM, it also fits the following vehicles. Please verify your model and year.
- AVALANCHE 1500: 2008-2013
- SIERRA 1500 PICKUP: 2007 (New Body Style), 2008-2013
- SIERRA 2500/3500 PICKUP: 2007 (New Body Style), 2008-2014
- SIERRA DENALI: 2007-2010
- SIERRA DENALI 2500/3500: 2011-2014
- SILVERADO 1500 PICKUP: 2007 (New Body Style), 2008-2013
- SILVERADO 2500/3500 PICKUP: 2007 (New Body Style), 2008-2014
- SUBURBAN 1500/2500: 2008-2014
- TAHOE: 2008-2014
- YUKON / YUKON XL: 2007-2014
This module is compatible with part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, 24252878.
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. We program the module to your vehicle’s VIN before we ship it. It arrives ready for a direct, plug-and-play installation, saving you time and money.
How do I provide my VIN number?
After you complete your purchase, you will need to send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we receive it.
Where is the TCCM located on my 2013 Sierra 2500?
On most 2007-2014 GM trucks and SUVs, the TCCM is mounted to a bracket behind the dashboard, to the left of the steering column. Access is typically gained by removing the lower dash knee bolster panel.
Is this a new or used part?
This is a high-quality, tested replacement part that has been professionally prepared and programmed with the latest software for your vehicle, ensuring reliable, long-term performance.
Will this fix my “Service 4WD” light?
In a vast majority of cases where the TCCM is faulty, this part will resolve the issue and turn off the warning light. However, you should always ensure other parts of the 4WD system, like the encoder motor and selector switch, are in good working order.