Regain Full Control of Your 4WD System
Is that frustrating “Service 4WD” light staring back at you from the dash? When your truck or SUV won’t shift into four-wheel drive, it’s more than an inconvenienceโit’s a loss of the capability and confidence you depend on. Get your vehicle back to full strength with this direct-fit, professionally Programmed Transfer Case Control Module (TCCM). We take the guesswork and the expensive trip to the dealership out of the equation, delivering a solution that’s ready to install right out of the box.
Common Symptoms & Your Solution
A failing TCCM can leave you stranded. If you’re experiencing any of the following issues, this module is the reliable fix you need:
- “Service 4WD” light is illuminated on the instrument cluster.
- Inability to switch between 2WD, 4-Hi, or 4-Lo.
- The 4WD selector switch lights don’t illuminate or flash without engaging.
- Vehicle is stuck in one drive mode.
- Diagnostic Trouble Codes (DTCs) such as C0306, C0327, C0374, or B0790 are present.
Don’t let a faulty electronic module compromise the rugged capability of your GM truck. This Programmed Transfer Case Control Module is flashed with the latest official GM software, specifically matched to your vehicle’s VIN, ensuring seamless communication and restored factory performance.
Features & Real-World Benefits
- โ VIN-Specific Programming Included: We flash the module to your exact vehicle before shipping. This means no expensive trips to the dealer for programmingโa savings of both time and money.
- โ True Plug-and-Play Installation: Because the programming is done, you can simply disconnect the old module and install this new one. Itโs a straightforward repair for a DIYer or any professional technician.
- โ Loaded with Latest GM Updates: Your module comes with the most current software from General Motors, addressing known bugs and improving operational reliability over older versions.
- โ Restores Full 4WD Functionality: Regain complete and reliable control over your four-wheel-drive system for any weather or terrain.
- โ Broad Model Compatibility: Replaces a wide range of original part numbers, ensuring a perfect match for your Silverado, Sierra, Tahoe, Yukon, and more.
- โ This unit is backed by our one-year replacement warranty.
An Expert’s Note: As a technician, one of the most common points of failure in modern 4WD systems is the TCCM. For years, the biggest headache wasn’t swapping the partโit was the mandatory, and often costly, dealer visit to get the new module programmed. A vehicle would be stuck on a lift, waiting for a tow to the dealership. This pre-programmed solution completely eliminates that critical, time-consuming step. It turns a multi-day, multi-location job into a simple, one-time fix you can do in your own garage.
Frequently Asked Questions
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 download the exact software and calibration files from GM for your specific vehicle configuration. We then flash this software onto the module before it is shipped to you.
Is this a simple plug-and-play installation?
Yes. Because the module arrives pre-programmed for your vehicle, the installation is a direct ‘plug-and-play’ process. You will need to disconnect the battery, locate and remove the old module (typically found under the dash on the driver’s side), and install this one. No further programming or calibration is required.
Will this fix my “Service 4WD” light?
In the vast majority of cases where the TCCM is the root cause of the problem, this part will resolve the issue and allow the “Service 4WD” light to be cleared. However, you should always confirm the diagnosis, as other issues (like a faulty encoder motor or selector switch) can sometimes cause similar symptoms.
How do I find my vehicle’s VIN?
Your VIN can be found on your vehicle’s registration, insurance card, or on the vehicle itself. Look for a small metal plate on the driver’s side of the dashboard visible through the windshield, or on the sticker inside the driver’s side door jamb.
What if my old module has a different part number?
This module is compatible with a wide range of original GM part numbers, which are listed in the description. As long as your vehicle model and year are listed as compatible and your old part number is on our cross-reference list, this module will work as a direct replacement.