Is Your Truck’s ‘Service 4WD’ Light Ruining Your Drive?
There’s nothing more frustrating than seeing a warning light on your dash, especially one that tells you a core feature of your truck or SUV is out of commission. When the four-wheel drive system on your Silverado, Tahoe, or Sierra fails, it compromises your vehicle’s capability and your confidence on the road. Whether you’re unable to switch drive modes, hear strange noises, or are simply staring at that persistent ‘Service 4WD’ message, the problem often points directly to a failed Transfer Case Control Module (TCCM). This isn’t just an inconvenience; it’s a critical failure that can leave you stranded in tough conditions. But a costly trip to the dealership for diagnostics and programming is no longer your only option.
Common Symptoms & Your Solution
A failing TCCM can manifest in several ways. You might experience a complete inability to shift into 4-HI or 4-LO, the selector switch lights may not illuminate, or the system might get stuck in one mode. This is often accompanied by Diagnostic Trouble Codes (DTCs) such as C0306, C0327, C0398, or U-codes indicating a loss of communication. This Programmed GM Transfer Case Control Module 24243085 is the definitive solution. We take a genuine GM module, flash it with the latest, most stable software updates, and program it specifically to your vehicle’s VIN before it ships. This means it arrives at your door ready for a straightforward, plug-and-play installation, restoring your 4×4 system to perfect working order without any additional programming fees.
- โ Arrives Ready to Install: We program this module to your vehicle’s specific VIN, which means you can install it yourself or have your local mechanic do it. This completely eliminates the need for an expensive trip to the dealership for programming.
- โ Flashed with GM Updates: Your module comes loaded with the newest software directly from GM. This resolves many of the common glitches and performance issues found in the original factory software, ensuring reliable operation.
- โ Restore Full 4WD Control: Regain immediate and dependable control over your 2WD, 4-HI, 4-LO, and Auto settings. Tackle any weather or terrain with the confidence that your four-wheel drive will engage precisely when you need it.
- โ Guaranteed Compatibility: This module is a direct replacement for a wide range of original part numbers, ensuring a perfect fit and function for your Silverado, Tahoe, Sierra, Suburban, and more. (See full fitment list).
- โ Peace of Mind Protection: This unit is backed by our one-year replacement warranty. You can buy with confidence knowing your purchase is protected against defects.
An Expert’s Insight: For years, a failed TCCM meant a tow to the dealer. The module itself wasn’t the only expense; you were also paying for hours of diagnostic and programming labor. These modules, located under the dash, are susceptible to electronic failure over time. Our process changes the game. By providing a Programmed GM Transfer Case Control Module 24243085, we empower owners and independent shops to perform this repair efficiently. You’re not just buying a part; you’re buying a complete, modern solution that saves you hundreds of dollars and significant downtime. It’s the smartest way to get your truck back to 100%.
Frequently Asked Questions
How do I provide my vehicle’s VIN?
After you complete your purchase, you can add your 17-digit VIN to the ‘notes’ section of your order. If you forget, we will contact you via email to request it. We cannot ship your module until we have your VIN, as the programming is essential for it to function in your vehicle.
Is this part truly ‘plug and play’?
Yes. Because we program the module to your specific VIN before shipping, it is ready for installation right out of the box. Once physically installed, it will communicate with your truck’s other systems correctly without requiring any further setup from a dealership or specialized scan tool.
Will this fix my ‘Service 4WD’ light?
In the vast majority of cases for the vehicles listed, a faulty TCCM is the root cause of the ‘Service 4WD’ light and related symptoms. While this module is the most common fix, we always recommend confirming the diagnosis. If your mechanic has diagnosed a bad TCCM, this is the correct part for the job.
Where is this module located on my vehicle?
On most compatible GM trucks and SUVs (like the Tahoe, Silverado, and Sierra), the Transfer Case Control Module is located on the driver’s side, mounted to a bracket behind the lower dashboard panel, to the left of the steering column.
Is this a new or used part?
This is a high-quality, inspected, and tested recycled OEM part that has been professionally programmed with the latest vehicle-specific software. It offers the same performance and reliability as a new dealer part. Our Programmed GM Transfer Case Control Module 24243085 is the most cost-effective and reliable solution available.