Restore Your Truck’s 4×4 Capability with a Plug-and-Play Solution
Is the dreaded “Service 4WD” light staring you down from the dashboard? 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 capable GM truck or SUV feeling powerless. Don’t waste time and money on dealership diagnostics and programming fees. This Programmed Transfer Case Control Module is the definitive, hassle-free solution to get you back in control and on the road with confidence.
Common Symptoms & Your Direct-Fit Solution
If you’re experiencing any of the following issues, this module is designed to be the fix you need:
- “Service 4WD” or “Service Four Wheel Drive” message on the dash
- Inability to switch between 2HI, 4HI, 4LO, or Auto modes
- Selector switch lights are blinking or not illuminating at all
- Diagnostic Trouble Codes (DTCs) such as C0306, C0321, C0327, or C0398
- Delayed or no engagement of the front axle
This module is not just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and extra steps out of the repair by pre-programming it to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures seamless communication with your truck’s other systems, just like the original, but with the benefit of the latest software updates from GM.
Features & Benefits
- โ VIN-Programmed for You: Arrives at your door flashed with the latest GM software specific to your truck. No expensive dealer tools or programming required.
- โ True Plug-and-Play Installation: Simply disconnect the old module and plug this one in. Itโs located under the driver’s side of the dash for easy access.
- โ Restores Full 4WD Function: Regain complete control over your transfer case and eliminate frustrating error messages.
- โ Broad Compatibility: Replaces a wide range of original part numbers, ensuring a perfect match for your vehicle (see full list in description).
- โ Cost-Effective Repair: Save hundreds of dollars compared to the cost of a new part and programming fees at a dealership.
- โ Guaranteed Performance: This unit is backed by our one-year replacement warranty.
An Expert’s Note on TCCM Failure
“Over my 20 years under the hood, I’ve seen countless GM trucks with these exact 4WD issues. The original TCCMs are prone to failure from electrical spikes, moisture intrusion, or simple component aging. Many DIYers make the mistake of buying a used module from a junkyard, only to find it won’t work because it’s programmed for a different vehicle. That’s why a pre-flashed Programmed Transfer Case Control Module is the smartest repair. It eliminates the single biggest obstacleโthe programmingโand turns a potentially complex electronic repair into a simple, 15-minute component swap.”
Frequently Asked Questions
How does the VIN programming process work?
It’s simple. After you complete your purchase, you will need to send us your 17-digit VIN. Our technicians will use certified equipment to load the latest GM-approved software for your specific vehicle onto the module. It will then be shipped to you, ready for installation.
What happens if I forget to provide my VIN?
We cannot ship your order without the VIN, as the module will not function correctly without being programmed. We will contact you via email to remind you. Providing the VIN promptly ensures your part ships as quickly as possible.
Is this part difficult to install myself?
For most individuals with basic mechanical skills, this is a very straightforward installation. The module is typically located under the dashboard on the driver’s side. It involves removing a few trim panels and disconnecting electrical connectors. Since our Programmed Transfer Case Control Module requires no further setup, you just plug it in and you’re done.
Will this fix my ‘Service 4WD’ light for sure?
A faulty TCCM is the most common cause for the “Service 4WD” light and related shifting issues on these GM models. While this module resolves the issue in the vast majority of cases, we always recommend confirming the diagnosis. Other potential causes could include a faulty encoder motor, selector switch, or wiring issue.
Is this compatible with part number 24261367?
Yes. This module is a direct replacement for a long list of original GM part numbers, including 24261367, 12588096, 24239190, 24242480, and many others listed in the fitment guide. It is functionally identical and programmed to perform correctly in your vehicle.