Regain Control of Your 4WD System
Is the dreaded “Service 4WD” message glaring at you from the dashboard? Are you struggling with a four-wheel-drive system that won’t engage, disengage, or seems to have a mind of its own? You rely on your GM truck or SUV to perform in all conditions, and a faulty Transfer Case Control Module (TCCM) can sideline your vehicle’s capabilities. This module is the solution you need. It arrives completely programmed to your vehicle’s specific VIN, eliminating the need for an expensive trip to the dealership for programming. This is a true plug-and-play fix to get you back on the road and trail with confidence.
Common Symptoms & Your Solution
A failing TCCM can manifest in several frustrating ways. If you’re experiencing any of the following, this module is the likely solution:
- “Service 4WD” Light: The most common indicator of a TCCM communication or internal fault.
- Inability to Shift: The transfer case is stuck in 2WD, 4WD, or Auto mode and will not respond to the selector switch.
- No Indicator Lights: The 4WD selector switch lights may not illuminate at all, indicating the module is not powering up.
- Diagnostic Trouble Codes (DTCs): Your mechanic may pull codes like C0327, C0306, or various U-codes pointing to a loss of communication with the TCCM.
This programmed 24252878 TCCM is the definitive answer to these issues, restoring the precise electronic control your transfer case requires for reliable operation.
Features & Benefits
- ✔ VIN-Specific Programming Included: We flash the module with the latest GM software using your vehicle’s VIN. This ensures perfect compatibility and function right out of the box.
- ✔ Eliminate Dealer Visits: Save hundreds of dollars and significant time by avoiding the dealership’s diagnostic and programming fees. This is a job you can do in your own garage.
- ✔ Direct-Fit Replacement: Engineered to be a perfect replacement for a wide range of original part numbers, including 24261367, 12588096, 24239190, and more, guaranteeing a straightforward installation.
- ✔ Restored Performance: Regain the confidence of a fully functional 4WD system that shifts smoothly and engages exactly when you need it to.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Insight on TCCM Failure
As a technician, I’ve replaced hundreds of these modules on GM trucks and SUVs. The original units are often susceptible to failure from moisture intrusion or internal electronic component breakdown over time. A common mistake is to grab a used module from a salvage yard. While it might be the same part number, it’s programmed to the donor vehicle and will not communicate with your truck’s systems. You’d still face a costly trip to the dealer for programming. Our solution bypasses that entire headache. By providing a quality module that is already a programmed 24252878 TCCM for your specific VIN, we’re giving you the most efficient and reliable path to a successful repair.
Frequently Asked Questions
What exactly does the TCCM do?
The Transfer Case Control Module (TCCM) is the electronic brain of your vehicle’s four-wheel-drive system. It takes input from the 4WD selector switch on your dash, as well as from various vehicle speed sensors, and then commands the electric motor on the transfer case to shift into the desired gear (e.g., 2HI, 4HI, 4LO).
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is crucial because it contains specific information about your truck’s options, like the exact type of transfer case it has (e.g., NQH, NQF). We use the VIN to load the correct GM factory software onto the module, ensuring it communicates perfectly with your vehicle’s other computers. Without this step, the part will not work.
Is this part difficult to install?
For someone with basic mechanical skills, this is a very manageable job. The TCCM is typically located under the driver’s side of the dashboard. It involves removing a few trim panels, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in the reverse order. No special programming tools are needed since we’ve already handled that for you.
Will this fix the “Service 4WD” light on my dash?
In the vast majority of cases where the TCCM is the root cause, yes, this part will resolve the issue and the warning light. However, it’s always wise to confirm the diagnosis. The “Service 4WD” light can also be triggered by a faulty selector switch, a bad transfer case encoder motor, or wiring issues. This programmed 24252878 TCCM is the most common solution for these symptoms.
My original module has a different part number. Will this still work?
Yes. This module is a direct replacement for all the part numbers listed in the description, including 24261367, 12588096, 24239190, 24240487, and others. GM frequently updates and supersedes part numbers over the years. As long as your vehicle is on the compatibility list, this module will fit and function correctly.
How does the warranty process work?
This unit is backed by our one-year replacement warranty. In the unlikely event you experience an issue with the module within one year of purchase, simply contact us. We will guide you through the process to receive a replacement part.