Regain Control of Your Truck’s 4×4 System
As a technician with over two decades of experience, I’ve seen countless GM trucks roll into the bay with the dreaded “Service 4WD” light glowing on the dash. The driver is usually frustrated, unable to shift into 4-High for a slippery road or out of 4-Low after a tough job. The problem often isn’t a major mechanical failure in the transfer case itself, but rather the electronic brain that controls it: the Transfer Case Control Module (TCCM). This module is the central command for your four-wheel-drive system, and when it fails, your truck’s all-terrain capability is gone. This isn’t just an inconvenience; it can be a serious safety issue in bad weather or a work-stopper on the job site.
We offer a dependable and straightforward solution: a replacement TCCM, part number 24239190, that arrives at your door fully programmed to your truck’s specific VIN. By providing us with your Vehicle Identification Number after purchase, we flash the module with the latest GM software updates. This means you get a part that is truly plug-and-play, eliminating the need for an expensive trip to the dealership for programming. This is the exact fix I’d perform in my own shop for a reliable, long-lasting repair to get a 2007-2014 Sierra 2500 TCCM back in perfect working order.
From the Diagnostic Bay
I remember a 2011 Sierra 2500 that came in stuck in 4-High. The owner used it for plowing and couldn’t get it back into 2WD. The “Service 4WD” light was on, and the selector switch did nothing. My first step was to scan for codes; we found a U0102 – Lost Communication with Transfer Case Control Module. While this can sometimes be a wiring issue, a quick check of the power, ground, and data lines to the TCCM confirmed they were good. The module itself was dead. Instead of a costly dealer part and a separate programming fee, the customer opted for one of our pre-programmed units. It arrived the next day, I installed it in under 30 minutes, and the 4×4 system was back to functioning perfectly. It’s an efficient, cost-effective repair that gets the truck back to work fast.
Is Your Truck’s 4×4 Acting Up?
A failing TCCM can cause a variety of symptoms. If you’re experiencing any of the following, this module is the most likely culprit. In my experience, these issues rarely fix themselves and will only get worse over time.
- âś” “Service 4WD” or “Service Four Wheel Drive” message on the instrument cluster.
- âś” Inability to switch between 2WD, 4-High, 4-Low, or Auto modes.
- âś” The 4WD selector switch lights don’t illuminate or flash without engaging.
- âś” Getting stuck in a single 4WD mode.
- âś” Diagnostic Trouble Codes (DTCs) stored in the system, such as C0306, C0327, C0374, or U0102.
- âś” A noticeable clunk or unusual noise when attempting to shift the transfer case.
A Straightforward Guide to Installation
Replacing the 2007-2014 Sierra 2500 TCCM is a job most DIYers can handle with basic tools. Since our module comes pre-programmed, there are no special computers required. Just follow these steps:
- Safety First: Always 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 locking tabs that need to be depressed. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCCM into place. Ensure it is securely mounted.
- Reconnect and Reassemble: Plug the electrical connectors firmly into the new module. You should hear a click as they lock in. Reinstall any dash panels you removed.
- Final Steps: Reconnect the negative battery terminal. Start the truck and test the 4WD selector switch to confirm that all modes engage correctly. The “Service 4WD” light should now be off.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of GM trucks and SUVs, ensuring a perfect fit and function. It is compatible with part numbers 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, and 24252878. Please confirm your vehicle is on the list below:
- 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 2500/3500: 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 1500/2500: 2008-2014
- TAHOE: 2008-2014
- YUKON / YUKON XL 1500/2500: 2007-2014
This is the definitive solution for your 2007-2014 Sierra 2500 TCCM and many other GM models, restoring full functionality to your vehicle’s essential 4×4 system.
What exactly does the TCCM do?
The Transfer Case Control Module (TCCM) is a small computer that acts as the brain for your 4WD system. It takes the input from your selector switch (the knob or buttons on your dash) and commands the transfer case encoder motor to shift between 2WD, 4WD High, and 4WD Low.
Why is VIN programming so important?
VIN-specific programming ensures the module has the correct software and calibrations for your truck’s exact configuration, including tire size, axle ratio, and transfer case type. This prevents compatibility issues and ensures smooth, reliable operation without needing a trip to the dealer for expensive programming.
Will this module fit my 2007 Sierra?
Yes, but it’s important to verify you have the ‘new style’ body with the smooth door skin. This module fits the 2007 new body style and all 2008-2014 models. It does not fit the 2007 ‘classic’ body style.
Is this a difficult part to replace myself?
Not at all. For most people with basic hand tools, this is a very straightforward job that can be completed in under an hour. It’s typically held in by a couple of bolts under the driver’s side dash. Our plug-and-play programming makes it one of the easier electronic component replacements.
What do I do after I place my order?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive your VIN, as we use it to program the module specifically for your vehicle.
Will this part fix my ‘Service 4WD’ light?
In the vast majority of cases where the TCCM has failed, yes. This module is the most common cause of that warning light and the associated shifting problems. Once installed, it should resolve the issue and clear the light.