Get Your Truckโs 4WD System Back in Command
Is your truck flashing a “Service 4WD” message? Are you stuck in two-wheel drive, unable to shift, or hearing strange noises from your transfer case? A failing Transfer Case Control Module (TCCM) is often the culprit, leaving your powerful GM truck or SUV feeling powerless when you need it most. This isn’t just an inconvenience; it’s a loss of the core capability you rely on. This replacement Programmed GM Transfer Case Control Module is the definitive, hassle-free solution to restore full control over your drivetrain and get you back on the road, trail, or job site with confidence.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a faulty TCCM is the likely cause. This module is designed to permanently resolve these problems:
- “Service 4WD” or “Service Four Wheel Drive” light is illuminated on the dash.
- Inability to switch between 2WD, 4-High, 4-Low, or Auto modes.
- The 4WD selector switch lights don’t illuminate or flash without engaging.
- Diagnostic Trouble Codes (DTCs) such as C0327, C0306, C0374, or other communication errors with the TCCM.
- Delayed or harsh engagement of the four-wheel-drive system.
Features & Benefits
- โ VIN-Specific Programming: We flash this module with the latest GM software updates specifically for your truck’s VIN before shipping. This ensures perfect compatibility and function right out of the box.
- โ No Dealer Visit Required: Because it arrives pre-programmed, you can skip the expensive and time-consuming trip to the dealership for programming. This is a true plug-and-play repair.
- โ Restores Full Functionality: Regain complete and reliable control over your 2WD and 4WD systems, ensuring your truck is ready for any weather or terrain.
- โ Direct-Fit Replacement: Engineered to be a perfect match for the original module, guaranteeing a straightforward installation with no modifications needed. This Programmed GM Transfer Case Control Module meets or exceeds original equipment specifications.
- โ Broad Compatibility: Replaces a wide range of original part numbers, including 24261367, 12588096, 24240487, and more, for an extensive list of GM trucks and SUVs.
- โ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Diagnostic Tip
As a technician, I’ve seen countless trucks with 4WD issues. While it’s wise to check the transfer case encoder motor and the front axle actuator for mechanical failure, the TCCM is the electronic brain of the system. These modules are often located under the vehicle or in the driver’s side dash, where they can be susceptible to moisture or voltage irregularities over time. A common failure point is internal corrosion or a fried processor, which leads to the frustrating intermittent or total loss of 4WD function. Installing a new, correctly programmed module like this one is often the fastest and most reliable way to fix the problem for good.
Don’t let a faulty module compromise the capability of your Chevrolet or GMC. By providing us with your VIN at checkout, you ensure you receive a Programmed GM Transfer Case Control Module that is ready for immediate installation, saving you hundreds in diagnostic and programming fees at a repair shop. Take control of your repair and restore your truck’s legendary four-wheel-drive performance.
Frequently Asked Questions
What does a Transfer Case Control Module do?
The TCCM is a small computer that acts as the brain for your vehicle’s four-wheel-drive system. It reads input from the driver’s selector switch and sensors, then commands the transfer case motor to shift the vehicle into the desired drive mode (e.g., 2WD, 4HI, 4LO).
How does the VIN programming process work?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this number to access the official GM database and load the exact software and calibrations your specific vehicle requires. This ensures the module communicates perfectly with your truck’s other computers.
Is this part difficult to install?
For someone with basic mechanical skills, the installation is very straightforward. The module is typically located on the driver’s side of the dashboard or under the driver’s seat. It involves disconnecting the battery, removing a few trim pieces, unplugging the electrical connectors from the old module, and swapping in the new one. Since it’s pre-programmed, no further steps are needed.
Will this fix my ‘Service 4WD’ light?
In the vast majority of cases where the TCCM is the source of the fault, yes. This module is designed to resolve the electronic issues that trigger the ‘Service 4WD’ warning light and related diagnostic trouble codes.
Do I need to send my old module back?
No, there is no core charge or requirement to return your original, failed module. You can dispose of it as you see fit.