Regain Control of Your 4×4 System
Is the frustrating ‘Service 4WD’ message lit up on your 2007-2014 Sierra 3500’s dash? Are you unable to switch between 2WD and 4WD, leaving you unprepared for bad weather or tough job sites? You’re looking at the most common culprit: a failed Transfer Case Control Module (TCCM). As a technician with over two decades of experience, I’ve seen this exact issue countless times. The TCCM is the electronic brain of your four-wheel-drive system, and when it fails, it can leave your capable truck stuck in two-wheel drive. This isn’t just an inconvenience; it’s a reliability issue you can’t afford to ignore.
This is the definitive, hassle-free solution. We offer a direct-replacement 2007-2014 Sierra 3500 TCCM that arrives at your door fully programmed to your truck’s specific Vehicle Identification Number (VIN). We flash it with the latest, most stable software directly from GM. This means no expensive trips to the dealership for programming, no special scan tools required, and no guesswork. It’s a true plug-and-play fix that gets your truck’s 4×4 system working correctly again.
A Technician’s Notebook: The Intermittent 4WD Fault
I remember a 2012 Sierra 2500 that came into my bay with a tricky complaint. The owner said his 4WD would sometimes refuse to engage, and the ‘Service 4WD’ light would flash, but then it would work fine the next day. A quick scan pulled a history code: U0102 – Lost Communication with Transfer Case Control Module. After verifying the TCCM had solid power and ground, we knew the module itself was failing internally. The problem with just swapping a used module is that it won’t be programmed for the truck’s specific options, leading to more errors. This pre-programmed unit is the exact fix I would use in my own shop to guarantee a one-time, correct repair.
Common Signs of a Failing TCCM
- ✔ The ‘Service 4WD’ or ‘Service Four Wheel Drive’ light is illuminated on your dashboard.
- ✔ Inability to shift the transfer case into or out of 4-High, 4-Low, or 2-High.
- ✔ The 4WD selector switch lights don’t illuminate or flash without engaging.
- ✔ Diagnostic Trouble Codes (DTCs) are stored, such as U0102, C0327, or C0306.
- ✔ A noticeable delay or grinding noise when the system attempts to 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: On most of these GM trucks, the TCCM is located on the driver’s side, up under the dashboard to the left of the steering column. It’s a small black box with a few electrical connectors.
- ✔ Disconnect and Remove: Carefully press the release tabs on the electrical connectors and pull them straight out. Then, unbolt the module from its mounting bracket.
- ✔ Install the New TCCM: Mount your new, pre-programmed module in the same location. Securely plug in the electrical connectors until they click into place.
- ✔ Final Steps: Reconnect the negative battery terminal. Start the vehicle and test the 4WD selector switch to confirm proper operation. The ‘Service 4WD’ light should now be off.
Guaranteed Fitment for Your GM HD Truck
This module is a direct replacement for part number 24243084 and other compatible part numbers listed below. It is guaranteed to fit the following vehicles. Please note the specific options for 2007 models (‘new style’ with smooth door skin).
Compatible Part Numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, 24252878
- GMC Sierra 3500 Pickup: 2007 (New Style), 2008, 2009, 2010, 2011, 2012, 2013, 2014
- Chevrolet Silverado 3500 Pickup: 2007 (New Style), 2008, 2009, 2010, 2011, 2012, 2013, 2014
- GMC & Chevrolet 1500/2500 Models: See full list including Avalanche, Suburban, Tahoe, Yukon & Denali variants in the fitment chart.
Frequently Asked Questions
Do I need to program this module?
No. This is the biggest benefit of our service. We program the module to your vehicle’s VIN before we ship it. It arrives ready for installation, saving you a trip to the dealer and hundreds in programming fees.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot ship your part until we receive this information, as the programming is essential for it to work correctly.
Where is the TCCM located on my 2011 Sierra 3500?
On the 2007-2014 GM trucks, the Transfer Case Control Module is typically mounted under the driver’s side of the dashboard, to the left of the steering column. It’s a black plastic box with several wiring harnesses connected to it.
My original part number isn’t 24243084, will this still work?
Yes, it will. GM often updates part numbers over time. This module is a direct replacement for all the part numbers listed in the description, including 24261367, 12588096, 24249095, and others. We ensure it’s programmed correctly for your truck regardless of the original number.
Is this a difficult part to replace myself?
For someone with basic hand tools and a little confidence, this is a very straightforward DIY job. The location under the dash can be a bit tight, but the process of unplugging the old module and plugging in the new one typically takes less than 30 minutes.