Regain Control of Your 4WD System
Is the dreaded “Service 4WD” message glaring at you from the dash of your Sierra Denali? Are you unable to switch between 2WD and 4WD, or stuck in a mode that’s not right for the road conditions? You’re not alone. As a technician with over two decades of experience, I’ve seen countless GM trucks sidelined by a failed Transfer Case Control Module (TCCM). This module is the brain of your four-wheel-drive system, and when it fails, it can leave your powerful truck feeling powerless. This isn’t just an inconvenience; it’s a matter of capability and safety, especially when you rely on your 4×4 for tough jobs or treacherous weather.
We offer a direct, reliable solution: a replacement TCCM, part number 24240487, that arrives at your door fully programmed to your truck’s specific VIN. This eliminates the most significant hurdle in this repair—the need for expensive dealer-only programming tools. You get a part that’s ready for installation right out of the box, restoring the function and confidence you expect from your Sierra Denali.
From the Diagnostic Bay
I remember a 2012 Sierra 2500 that came into the shop. The owner was frustrated because his 4WD would work intermittently. Sometimes the switch would do nothing; other times, it would get stuck in 4-HI. He’d already replaced the dash switch to no avail. After connecting my scan tool, I found a U0102 code—Lost Communication with Transfer Case Control Module. Instead of a complex wiring issue, a quick voltage check at the module confirmed the TCCM itself was the culprit. Internal corrosion, a common issue, was causing it to fail sporadically. We installed a VIN-programmed module, and in under 30 minutes, the truck’s 4WD system was operating perfectly. It’s a classic case where the fix is much simpler than the symptoms suggest.
Is Your Sierra’s 4WD Acting Up?
A failing TCCM can manifest in several ways. If you’re experiencing any of the following, this module is the most likely solution for your 2011-2014 Sierra Denali 2500 TCCM issues:
- ✔ “Service 4WD” or “Service Four Wheel Drive” light is illuminated on the instrument cluster.
- ✔ Inability to shift the transfer case into or out of 4-HI, 4-LO, or 2-HI.
- ✔ The 4WD selector switch lights don’t illuminate or flash without engaging.
- ✔ Diagnostic Trouble Codes (DTCs) are stored in the system, such as U0102 (Lost Communication With TCCM).
- ✔ A noticeable delay or grinding noise when the system attempts to engage.
Your Straightforward Installation Guide
One of the best parts about this solution is its simplicity. Because we handle the programming, you can perform the installation at home with basic hand tools. This is a common repair for both seasoned mechanics and first-time DIYers.
- 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, behind the lower dashboard panel to the left of the steering column. You may need to remove a plastic trim panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be depressed. Once disconnected, unbolt the old TCCM 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 to confirm a solid connection.
- Final Steps: Reinstall any trim panels you removed and reconnect the negative battery terminal. Start the truck and test the 4WD selector switch to confirm proper operation. The “Service 4WD” light should be off.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM trucks and SUVs. While this listing is specifically for the 2011-2014 Sierra Denali 2500 TCCM, it also fits the following vehicles. Please verify your model and year below. This part is a compatible replacement for part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, and 24252878.
- AVALANCHE 1500: 2008-2013
- SIERRA 1500 PICKUP: 2007 (New Body Style, NQH), 2008-2013
- SIERRA 2500 PICKUP: 2007 (New Body Style, 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, NQH), 2008-2013
- SILVERADO 2500 PICKUP: 2007 (New Body Style, NQF), 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