Restore Full Control of Your Truck’s 4WD System
If you’re staring at that frustrating “Service 4-Wheel Drive” message on your 2007-2010 Sierra Denali’s dash, you’re not alone. In my 20+ years as a technician, I’ve seen hundreds of these GMT900-platform trucks lose their 4WD capability due to a failed Transfer Case Control Module (TCCM). The symptoms are unmistakable: the selector switch lights are out, you can’t shift between 2WD and 4WD, or it’s stuck in a single mode. This isn’t just an inconvenience; it’s a safety issue when you need that traction in bad weather or tough terrain.
The problem is that a new module from the dealership requires expensive programming with their proprietary tools. This is where we come in. This TCCM, part number 24242480, is the definitive solution. We take the hassle and high cost out of the equation. Simply provide us with your vehicle’s VIN at checkout, and we will program the module with the latest, most stable GM software specifically for your truck. It arrives at your door ready for a simple, direct-fit installation. No dealer visits, no programming fees, no headaches.
A Technician’s Notebook: The Intermittent 4WD Ghost
A customer brought in his ’09 Sierra Denali, complaining that his 4WD would randomly stop working. The selector switch would go dark, and he’d get the “Service 4WD” light. Sometimes a restart would fix it, sometimes not. He’d already replaced the selector switch with no luck. After connecting my scan tool, I saw communication loss codes with the TCCM. These modules are often located under the driver’s side dash, but they can still be susceptible to internal solder joint fractures from years of vibration and thermal cycles. We installed one of our pre-programmed modules, and the problem was solved instantly. The customer was back on the road in under 30 minutes, his 4WD system more reliable than ever.
Is Your Truck Showing These TCCM Failure Signs?
A failing TCCM can manifest in several ways. If you’re experiencing any of the following, this module is very likely the solution you need.
- ✔ “Service 4-Wheel Drive” message displayed on the Driver Information Center (DIC).
- ✔ Inability to shift the transfer case into or out of 4WD High, 4WD Low, or 2WD.
- ✔ The 4WD selector switch lights are not illuminated or are flashing.
- ✔ The vehicle is stuck in one drive mode.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as C0327 (Encoder Circuit Malfunction), C0398 (Encoder Circuit High Performance), or various U-codes (U0102) indicating a loss of communication with the TCCM.
Your 15-Minute Path to Restored 4WD
Replacing the TCCM is a straightforward job that most DIYers can handle with basic hand tools. This pre-programmed module makes it a true plug-and-play repair.
- 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 of the vehicle, mounted to a bracket up under the dashboard, to the left of the steering column.
- Remove the Old Module: Unplug the electrical connectors. They have locking tabs that need to be depressed. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed TCCM into place. Firmly reconnect the electrical connectors, ensuring they click and lock securely.
- Final Steps: Reconnect the negative battery terminal. Start the truck and test the 4WD selector switch. The lights should illuminate, and you should be able to shift through all drive modes successfully. The “Service 4WD” message will be gone.
Will This Fit My Truck or SUV?
We guarantee this module is a direct-fit replacement for the original part on a wide range of General Motors vehicles. Please verify your model and year from the list below. This part is a compatible replacement for multiple part numbers, including 24261367, 12588096, 24241970, and 24242480.
SIERRA 1500 PICKUP 07 (new style) & 08-13
SIERRA 2500 PICKUP 07 (new style) & 08-14
SIERRA 3500 PICKUP 07 (new style) & 08-14
SIERRA DENALI 07-10
SIERRA DENALI 2500/3500 11-14
SILVERADO 1500 PICKUP 07 (new style) & 08-13
SILVERADO 2500 PICKUP 07 (new style) & 08-14
SILVERADO 3500 PICKUP 07 (new style) & 08-14
SUBURBAN 1500 08-14
SUBURBAN 2500 08-13
TAHOE 08-14
YUKON & YUKON XL 1500/2500 07-14
(Note: Location is LH dash for all models listed)
Frequently Asked Questions about the 2007-2010 Sierra Denali TCCM
Frequently Asked Questions
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) is essential for us to program the TCCM with the exact software and calibrations specified by GM for your truck’s specific options. This ensures perfect compatibility and function right out of the box.
Is this a difficult part to install myself?
Not at all. For most DIYers with basic tools, this is a 15-30 minute job. The module is located under the driver’s side dash and is easy to access. Since our module comes pre-programmed, it’s a simple swap.
Will this fix the “Service 4WD” light on my dash?
In the vast majority of cases, yes. The symptoms described above, especially the service light combined with an inoperative selector switch, point directly to a failed TCCM. This part is designed to be the definitive fix for that common issue.
Do I need to have the dealership do anything after I install it?
No. The entire point of our service is to help you avoid the dealership. The module is fully programmed and ready for installation. Once installed, the system will be fully operational.
What if I install it and my 4WD still doesn’t work?
While the TCCM is the most common point of failure, other components like the transfer case encoder motor or the dash switch can also cause issues. We recommend confirming your diagnosis, but rest assured this module will solve any software or internal electronic faults within the TCCM itself.