Restore Your Truck’s Four-Wheel Drive Capability
As a technician with over two decades of experience under the hood of GM trucks, I’ve seen the frustration firsthand. The “Service 4WD” light illuminates your dash, and suddenly your reliable Sierra Denali won’t shift into 4-High when you need it most. Before you start pricing out expensive transfer case repairs, take a breath. In my shop, the culprit is very often a failed Transfer Case Control Module (TCCM), the electronic brain of your 4×4 system. This isn’t just a part; it’s a direct, effective solution to get you back in control.
This module, part number 24239190, is the definitive fix for a wide range of GM trucks and SUVs, including your 2007-2010 Sierra Denali. What makes this the smart choice? We handle the most critical step for you. Upon purchase, you provide us with your Vehicle Identification Number (VIN), and we program the module with the latest, most stable software directly from GM. This means it arrives at your door ready for a true plug-and-play installation, saving you a costly trip to the dealership for programming. You avoid the tow bill, the diagnostic fees, and the high labor rates associated with dealer-only electronic work.
From the Diagnostic Bay
I remember a 2009 Sierra Denali coming into my shop. The owner was convinced he needed a new transfer case. His 4WD selector switch was unresponsive, and he was stuck in 2WD right before a big snowstorm. He’d already gotten a quote for over two thousand dollars. After a quick scan, I found a classic TCCM communication fault code. Instead of a multi-day, wallet-draining repair, we installed a VIN-programmed module just like this one. In under an hour, his 4WD system was working perfectly. He drove away with peace of mind and a much healthier bank account. That’s the power of a proper diagnosis and the right part.
Diagnosing a Faulty 2007-2010 Sierra Denali TCCM
A failing TCCM can manifest in several ways, often confusing owners and even some technicians. The module’s internal circuitry can degrade over time due to heat cycles and vibration, leading to communication errors or complete failure. If your truck is experiencing these issues, this pre-programmed module is your most likely solution.
Common Signs of a Failing TCCM
- ✔ “Service 4WD” or “Service Four Wheel Drive” message on the instrument cluster.
- ✔ Inability to shift the transfer case between 2WD, 4-High, 4-Low, or Auto modes.
- ✔ The selector switch lights don’t illuminate or flash without engaging.
- ✔ Getting stuck in one mode (e.g., stuck in 4-Low).
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as C0306, C0327, C0374, or U0102 (Lost Communication with TCCM).
- ✔ A noticeable clunking or grinding sound when attempting to shift modes, caused by incorrect commands from the module.
A Straightforward Guide to Your TCCM Installation
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- ✔ Locate the Module: On most GMT900 platform trucks like your Sierra Denali, the TCCM is located on the driver’s side of the dashboard, 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 TCCM. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Bolt your new, pre-programmed TCCM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- ✔ Final Steps: Reinstall any dash panels you removed. Reconnect the negative battery terminal. Start the vehicle and test the 4WD selector switch to confirm all modes engage correctly. The “Service 4WD” light should now be off.
Verified Compatibility for Your GM Truck or SUV
This module is a direct replacement for a wide array of GM vehicles and is compatible with multiple part numbers, ensuring a perfect fit. Please check the list below. This part replaces: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, 24252878.
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 2500/3500: 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: 2008-2014
SUBURBAN 2500: 2008-2013
TAHOE: 2008-2014
YUKON: 2007 (Denali), 2008-2014
YUKON XL 1500: 2007 (Denali), 2008-2014
YUKON XL 2500: 2008-2013
How does the programming process work?
How does the programming process work?
After you complete your purchase, simply send us a message with your 17-digit VIN. Our technicians will use certified equipment to flash the module with the specific GM software for your vehicle’s configuration. This ensures seamless communication and proper function right out of the box.
Is this a difficult part to install myself?
For most DIYers with basic tools, this is a very manageable job. The module is typically located behind the lower driver-side dash panel. Access is the main challenge, but the physical replacement is just a few bolts and electrical connectors. No special tools are needed.
Will this fix my ‘Service 4WD’ light?
In a vast majority of cases where the symptoms match those listed above (inability to shift, flashing lights, specific codes), a failed TCCM is the root cause. Replacing it with this pre-programmed unit is the correct and permanent fix, which will turn off the warning light.
What happens if I don’t provide my VIN?
We cannot ship the module without your VIN. The programming is essential for the part to function in your vehicle. We will hold your order and contact you to ensure we get the necessary information to provide you with a working part.
Is this part compatible with other part numbers?
Yes. This module, 24239190, is a direct, compatible replacement for several other GM part numbers, including 24261367, 12588096, 24240487, and more, as listed in the fitment section. It’s a consolidated solution with the newest software.