Is a “Service 4WD” Light Ruining Your Drive?
There’s nothing more frustrating than looking down at your dash and seeing the dreaded “Service 4WD” light, especially when you rely on your truck’s capability. When you can’t switch into 4-High or 4-Low, or the selector switch does nothing at all, your powerful GM truck or SUV suddenly feels limited. This issue often points directly to a failed Transfer Case Control Module (TCCM). Instead of facing a costly and time-consuming trip to the dealership, take control of the repair with a solution designed for you. This is the definitive fix for restoring your vehicle’s all-terrain confidence.
Common Symptoms & Your Direct-Fit Solution
A failing TCCM can manifest in several ways, leaving you stuck in two-wheel drive. If you’re experiencing any of the following, this module is the solution you need:
- “Service 4WD” or “Service Four Wheel Drive” message on the instrument cluster.
- Inability to shift the transfer case between 2HI, 4HI, 4AUTO, and 4LO.
- The 4WD selector switch lights don’t illuminate or flash without engaging.
- Diagnostic Trouble Codes (DTCs) stored in the system, such as C0327, C0398, or U-codes indicating a loss of communication.
Our Programmed GM Transfer Case Control Module 24243085 is the answer. We take a genuine quality module and flash it with the very latest GM-certified software, programmed specifically to your vehicle’s unique VIN. This means it arrives at your door ready to install, with no additional programming required. You get a reliable part that restores factory function perfectly.
Features & Benefits
- โ Plug & Play Installation: This module is pre-programmed to your vehicle’s VIN. Simply provide your VIN at checkout, and we handle the complex part so you can perform a simple installation.
- โ Skip the Dealership: Avoid expensive dealer programming fees and long wait times. This solution puts the power back in your hands, saving you both time and money.
- โ Updated GM Software: We flash each module with the newest software updates from General Motors, ensuring optimal performance and correcting known factory bugs.
- โ Restored 4×4 Functionality: Regain full control of your four-wheel-drive system. Switch modes seamlessly and drive with the confidence that your truck is ready for any road or weather condition.
- โ Broad Compatibility: Replaces a wide range of original part numbers, including 24261367, 12588096, 24243085, and more, for a huge selection of GM trucks and SUVs.
- โ This unit is backed by our one-year replacement warranty.
From the Shop Floor: The VIN-Programmed Advantage
As a technician, I’ve seen countless truck owners replace part after part trying to chase down a 4WD issue. A common mistake is overlooking the TCCM because it’s an electronic part. We had a 2011 Silverado 2500 in the shop that wouldn’t shift into 4WD. The owner had already replaced the actuator and the dash switch. The real problem was a dead TCCM. By providing a Programmed GM Transfer Case Control Module 24243085 flashed to his specific VIN, we didn’t just sell him a partโwe sold him a final solution. He installed it himself in under 30 minutes and his 4WD system came back to life instantly. That’s the difference between just a part and a complete repair.
Frequently Asked Questions
What is a TCCM and what does it do?
The Transfer Case Control Module (TCCM) is a small computer that acts as the ‘brain’ for your vehicle’s four-wheel-drive system. It receives input from the 4WD selector switch on your dash and sends commands to the transfer case encoder motor/actuator to shift between 2WD and 4WD modes.
Why does this module need to be programmed to my VIN?
Modern GM vehicles have complex electronic systems. The TCCM must be programmed with your vehicle’s specific VIN to ensure it can communicate correctly with the other computers on board, like the Engine Control Module (ECM) and Body Control Module (BCM). Our pre-programming service makes this a seamless, plug-and-play installation for you.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive the VIN, as the programming is a critical step in the process.
Is this a difficult part to install?
For most GM trucks and SUVs covered in this listing, the TCCM is located on the driver’s side of the dashboard, often behind the lower dash panel. It is typically held in by a few bolts or clips and has a few electrical connectors. For someone with basic mechanical skills, it is a very straightforward installation that usually takes less than an hour.
Will this fix my “Service 4WD” light for sure?
A faulty TCCM is one of the most common causes of the “Service 4WD” light and related symptoms. While we cannot guarantee a diagnosis without seeing the vehicle, if your symptoms match those listed (no-shift condition, communication codes), this module is the most likely and effective solution.
My original part number isn’t 24243085, will this still work?
Yes. This module is a direct replacement for all the part numbers listed in the description, including 24261367, 12588096, 24239190, and more. We program it to function perfectly for your specific vehicle, regardless of which of the compatible part numbers was originally installed.