Regain Control of Your 4WD System with a Plug-and-Play Solution
Is that frustrating “Service 4WD” light glaring at you from the dash of your 2007-2010 Sierra Denali? Are you unable to switch drive modes, leaving you stuck in 2WD when you need 4WD the most? You’re not alone. The Transfer Case Control Module (TCCM) is the electronic brain of your truck’s four-wheel-drive system, and when it fails, it can sideline your vehicle’s capabilities. This isn’t just an inconvenience; it’s a matter of safety and reliability, especially in poor weather or off-road conditions.
This is the definitive, no-hassle fix. We offer a genuine replacement TCCM, part number 24242480, that comes fully programmed to your truck’s specific Vehicle Identification Number (VIN). This means you can skip the expensive trip to the dealership for programming. We handle the complex part, so you get a module that is truly plug-and-play, loaded with the latest GM software updates for optimal performance and longevity.
From the Diagnostic Bay: A Common Sierra 4×4 Failure
Just last week, a 2009 Sierra Denali was towed to my shop. The owner was frustrated because his 4×4 switch was completely dead, and the “Service 4WD” message wouldn’t go away. He was worried about a costly mechanical repair inside the transfer case itself. After connecting my scan tool, I found no communication with the TCCM (a classic U0102 code). A quick check of the powers and grounds at the module confirmed the TCCM itself was the culprit—a very common issue I’ve seen on hundreds of these GM trucks. The internal circuit board had failed. Instead of sending him to a dealer for a new module and a separate programming fee, we ordered one of these pre-programmed units. An hour after it arrived, the new module was in, the codes were cleared, and the 4×4 system was shifting perfectly. This is the efficient, reliable repair both professionals and DIYers need.
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 likely solution for your 2007-2010 Sierra Denali TCCM issues:
- ✔ “Service 4WD” or “Service Four Wheel Drive” message on the instrument cluster.
- ✔ The 4WD selector switch lights are off or flash without engaging.
- ✔ Inability to shift between 2HI, 4HI, 4LO, or Auto modes.
- ✔ The vehicle is stuck in one drive mode (e.g., 4HI).
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as C0306, C0321, C0327, or the communication code U0102.
A Straightforward Guide to Installation
Replacing the TCCM is a job most DIYers can handle in under 30 minutes with basic tools. Because this module arrives pre-programmed, no special scan tools are needed.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the Module: On your Sierra Denali, the TCCM is typically located under the driver’s side of the dashboard, to the left of the steering column. It’s a small black box with several electrical connectors.
- Unplug and Unbolt: Carefully depress the locking tabs on each electrical connector and pull them straight out. Then, remove the bolts or nuts holding the module bracket to the vehicle.
- Install the New TCCM: Mount your new, pre-programmed TCCM in the same location and secure it. Firmly plug in all the electrical connectors until they click into place.
- Power Up: Reconnect the negative battery terminal. Turn the ignition to the ‘On’ position (without starting the engine) and test the 4WD selector switch. You should see the lights respond and hear the transfer case motor engage as you cycle through the modes.
Verified Vehicle Compatibility
This module is a direct replacement for part number 24242480 and is compatible with a wide range of GM trucks and SUVs. We will program it specifically for your vehicle. Please confirm your model and year from the list below:
- Sierra Denali: 2007-2010
- Avalanche 1500: 2008-2013
- Sierra 1500/2500/3500 Pickup: 2007 (New Body Style) – 2014
- Silverado 1500/2500/3500 Pickup: 2007 (New Body Style) – 2014
- Suburban 1500/2500: 2008-2014
- Tahoe: 2008-2014
- Yukon / Yukon XL 1500 / Yukon XL 2500: 2007-2014
This module also replaces part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24243084, 24243085, 24249095, 24252878.
Frequently Asked Questions
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as the programming is essential for it to work correctly in your truck.
What does “pre-programmed” actually mean?
It means we load the module with the correct GM factory software for your specific vehicle’s options and configuration. This allows the TCCM to communicate properly with your truck’s other computers (like the ECM and BCM) right out of the box, eliminating the need for dealer-only tools.
Is this part difficult to install myself?
Not at all. For most owners with basic hand tools, this is a simple plug-and-play process that takes less than 30 minutes. It’s one of the easier electronic modules to replace on these vehicles.
Will this fix my “Service 4WD” light for good?
If a faulty TCCM is the cause of the light, then yes, this will be the correct and permanent fix. The TCCM is the most common point of failure for these symptoms. We always recommend a proper diagnosis to confirm the module is the problem before ordering.
Where is the TCCM located on a 2008 Sierra Denali?
It is mounted under the dashboard on the driver’s side, usually to the left of the steering column and above the emergency brake pedal assembly. It’s a black plastic box with multiple wiring harnesses connected to it.