Is that frustrating ‘Service 4WD’ light glaring at you from the dash of your 2007-2010 Sierra Denali? Are you unable to switch between 2WD and 4WD, leaving you unprepared for changing road conditions? You’ve come to the right place for a real-world, reliable solution. As a technician with over two decades of experience, I’ve seen countless GM trucks sidelined by a faulty Transfer Case Control Module (TCCM). This isn’t just an inconvenience; it’s a matter of capability and safety.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine GM-spec TCCM and pre-program it with the very latest vehicle-specific software directly from GM. By providing us with your VIN at checkout, you receive a module that is 100% plug-and-play. This critical step eliminates the need for an expensive trip to the dealership for programming, saving you both time and money. Restore your truck’s four-wheel-drive system with confidence.
A Technician’s Notebook: The ‘Service 4WD’ Light Mystery
I remember a 2009 Sierra Denali rolling into my bay. The owner was frustrated because his 4WD was completely unresponsive, and the ‘Service 4WD’ light was on. He’d already replaced the dash switch to no avail. My first step was to connect a professional scan tool. It couldn’t communicate with the TCCM, throwing a U0102 code (Lost Communication With Transfer Case Control Module). This is a classic sign. After confirming the module had power and ground, the diagnosis was clear: internal TCCM failure. These modules, located under the driver’s side dash, are susceptible to voltage spikes and internal corrosion over time. We installed a VIN-programmed module just like this one, and within 15 minutes, all 4WD functions were restored, and the codes were gone. This pre-programmed approach is the most efficient fix I’ve found in my 20+ years on the job.
Is Your Truck Showing These Symptoms?
A failing TCCM can cause a range of issues. If you’re experiencing any of the following, this module is the likely solution for your 2007-2010 Sierra Denali.
- ✔ ‘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 2-Wheel Drive.
- ✔ Diagnostic Trouble Codes (DTCs) stored, such as U0102, C0306, C0327, or C0374.
- ✔ The 4WD selector switch lights do not illuminate or flash without engaging.
- ✔ A noticeable delay or grinding noise when attempting to engage 4WD.
- ✔ The vehicle is stuck in one mode (e.g., stuck in 4WD).
A Straightforward Guide to Installation
One of the best parts of our VIN-programmed 2007-2010 Sierra Denali TCCM is the simple installation. No special tools are required.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the Module: The TCCM is typically located under the driver’s side of 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 release tabs that need to be pressed. 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 securely into position.
- Final Steps: Reinstall any trim panels you removed. Reconnect the negative battery terminal. Start the truck and test all 4WD functions to confirm the repair.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM trucks and SUVs. Please confirm your vehicle is on the list below. This part is compatible with and replaces part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, 24252878.
- AVALANCHE 1500 08-13
- 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
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to load the correct, vehicle-specific software from GM onto the module. This ensures perfect communication with your truck’s other systems and makes the part plug-and-play, saving you a trip to the dealer.
Is this part difficult to install for a DIYer?
Not at all. The installation is very straightforward. It involves removing a dash panel, unplugging the old module, and plugging in the new one. Basic hand tools are all that’s required, and because it’s pre-programmed, no computer or scanner is needed.
Will this fix the ‘Service 4WD’ light?
In the vast majority of cases where the TCCM is the root cause, yes. This module is designed to resolve communication errors and functional problems that trigger the ‘Service 4WD’ warning.
Is this a new or used part?
This is a high-quality, inspected component that has been tested and loaded with brand new GM software. It is guaranteed to function correctly and restore your vehicle’s 4WD system to factory operation.
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 proper diagnostics. However, our expert team is here to help you troubleshoot if you run into any problems.
Which part number will I receive?
You will receive a module that is a direct hardware equivalent for part number 24243085 and the other listed compatible numbers. The crucial part is the VIN-specific software we program it with, which makes it a perfect match for your truck.