Restore Your Truck’s 4×4 Capability Instantly
Is the dreaded “Service 4WD” message glaring at you from the dash of your 2007-2010 GMC Sierra Denali? Are you unable to switch between 2WD and 4WD, leaving you without the traction you depend on? As a technician with over two decades of experience, I’ve seen this exact issue countless times. The problem often points directly to a failed Transfer Case Control Module (TCCM) – the electronic brain of your truck’s four-wheel-drive system. This isn’t just an inconvenience; it’s a loss of the core capability and safety your Sierra Denali was built for.
This isn’t a generic, one-size-fits-all part. We offer a direct, plug-and-play solution. This genuine GM-spec TCCM, part number 24240487, comes fully programmed to your vehicle’s specific VIN before it ever leaves our facility. This means no expensive trips to the dealership for flashing, no special scan tools required for setup. You get a part loaded with the latest GM software updates, ensuring optimal communication and performance right out of the box. This is the definitive fix for restoring the all-terrain confidence you need.
A Technician’s Notebook: The Misleading Encoder Motor
A customer brought in his ’09 Sierra Denali, frustrated because he’d already replaced the transfer case encoder motor, but his 4WD was still inoperative and the service light remained on. He was convinced the new motor was faulty. After connecting my scan tool, I saw a U0102 code – Lost Communication with Transfer Case Control Module. The TCCM wasn’t talking to the rest of the truck. A quick check of the module’s power and ground confirmed they were good. The module itself had failed internally, a common issue from heat cycles and vibration. We installed one of our pre-programmed TCCMs, and within 15 minutes, all 4WD functions were restored. It’s a classic case of diagnosing the brain, not just the muscle.
Is Your Sierra Denali Showing These Symptoms?
A failing TCCM can manifest in several ways. If you’re experiencing any of the following, this module is the most likely solution for your 2007-2010 Sierra Denali TCCM issues.
- ✔ “Service 4WD” or “Service Four Wheel Drive” message on the instrument cluster.
- ✔ Inability to shift the transfer case into or out of 4-High, 4-Low, or Auto modes.
- ✔ The 4WD selector switch lights are flashing or completely off.
- ✔ The vehicle is stuck in one drive mode (e.g., 2WD or 4WD).
- ✔ Diagnostic Trouble Codes (DTCs) stored, such as C0327, C0396, or U0102.
- ✔ A noticeable delay or clunking sound when attempting to engage 4WD.
A Straightforward Guide to Installation
Replacing the TCCM is a job most DIYers can handle in their own driveway with basic hand tools. Since we’ve handled the programming, the physical swap is all that’s left. Here’s a simple step-by-step guide:
- Safety First: Always disconnect the negative terminal from your truck’s battery before working on any electronic components.
- Locate the Module: On most GMT900 trucks like your Sierra Denali, the TCCM is located under the driver’s side of the dashboard, typically 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 module. They have locking tabs, so be sure to depress them fully. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCCM into the mounting bracket. Firmly reconnect the electrical connectors, ensuring they click into place.
- Final Steps: Reinstall any dash panels you removed. Reconnect the negative battery terminal. Start the vehicle and test all 4WD selector functions to confirm the repair is complete. The “Service 4WD” light should be gone.
Guaranteed Fitment for Your GM Truck or SUV
This TCCM is a direct-fit replacement for a wide range of General Motors vehicles. Please verify your model and year below. This part resolves issues for modules located on the left-hand (LH) side of the dash.
SIERRA 1500 PICKUP 07 (new style, opt NQH)
SIERRA 1500 PICKUP 08-13
SIERRA 2500 PICKUP 07 (new style, opt NQF)
SIERRA 2500 PICKUP 08-14
SIERRA 3500 PICKUP 07 (new style)
SIERRA 3500 PICKUP 08-14
SIERRA DENALI 07-10
SIERRA DENALI 2500/3500 11-14
SILVERADO 1500 PICKUP 07 (new style, opt NQH)
SILVERADO 1500 PICKUP 08-13
SILVERADO 2500 PICKUP 07 (new style, opt NQF)
SILVERADO 2500 PICKUP 08-14
SILVERADO 3500 PICKUP 07 (new style)
SILVERADO 3500 PICKUP 08-14
SUBURBAN 1500 08-14
SUBURBAN 2500 08-13
TAHOE 08-14
YUKON / YUKON XL 1500 07-14 (including Denali)
YUKON XL 2500 08-13
This module is compatible with part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, 24252878.
Frequently Asked Questions
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive this information.
Is this a plug-and-play part?
Yes! Because we program the module to your specific VIN before shipping, it is a true plug-and-play solution. No dealership visit or additional programming is required for your 2007-2010 Sierra Denali TCCM replacement.
Will this fix my ‘Service 4WD’ light?
In the vast majority of cases where the TCCM is the root cause, yes. If your vehicle displays symptoms like an inability to shift modes or communication-related DTCs (like U-codes), this module is the correct fix.
Where is the TCCM located on my truck?
On the 2007-2010 Sierra Denali, the Transfer Case Control Module is mounted under the driver’s side dashboard, usually to the left of the steering column.
Is this compatible with other part numbers?
Yes, this module is a direct replacement for a long list of GM part numbers, including 24261367, 12588096, 24239190, and all others listed in the fitment section.