Get Your 4WD Back Without the Dealership Hassle
Is the dreaded “Service 4WD” light glaring at you from the dash of your Sierra, Silverado, or Tahoe? Are you struggling to shift between 2WD and 4WD, or is your truck stuck in one mode? A faulty Transfer Case Control Module (TCCM) is the most common culprit, leaving your capable truck unprepared for tough jobs or bad weather. This isn’t just an inconvenience; it’s a loss of the core capability you depend on. Forget expensive diagnostic fees and programming charges at the dealership. We have the definitive, straightforward solution to get your truck back to 100%.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, this module is the reliable fix you need:
- “Service 4WD” or “Service Four Wheel Drive” message on the instrument cluster
- Inability to switch between 2HI, 4HI, and 4LO
- Indicator lights on the 4WD selector switch are not illuminating or are flashing
- Unusual grinding or clunking noises when attempting to engage the transfer case
- Diagnostic Trouble Codes (DTCs) such as C0306, C0321, C0327, C0374, or U1000
This is a genuine, direct-fit programmed GM transfer case control module that restores full functionality to your four-wheel-drive system. We take the guesswork and extra steps out of the repair. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash the module with the latest, most stable software updates directly from GM. It arrives at your door ready for a simple, plug-and-play installation.
Features & Benefits
- ✔ VIN-Programmed for Your Truck: Arrives ready to install with no need for an expensive trip to the dealership for programming. This is a true plug-and-play fix.
- ✔ Restores Full 4WD Functionality: Regain complete and reliable control over your 2WD, 4HI, and 4LO settings, ensuring your truck is ready for any terrain or weather condition.
- ✔ Loaded with Latest GM Updates: We flash the module with the newest OEM software, correcting common bugs and improving transfer case performance and longevity.
- ✔ Direct OE-Fit Replacement: Engineered to be a perfect replacement for a wide range of original part numbers, including 24261367, 12588096, 24239190, and more, guaranteeing a perfect fit and connection.
- ✔ Eliminate Annoying Warning Lights: Permanently clear the “Service 4WD” message from your dash and restore your peace of mind.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: The Smart Fix vs. The Junkyard Gamble
As a technician, I’ve seen countless truck owners try to save a few bucks by pulling a TCCM from a junkyard. Here’s the problem: that module is programmed for the donor truck’s specific options (axle ratio, tire size, transfer case type). Installing it in your vehicle will, at best, not work, and at worst, cause communication errors across other vehicle systems. You’ll still end up at the dealer paying for programming, wiping out any initial savings. Our programmed GM transfer case control module bypasses this entire headache. It’s the most efficient and reliable way to get the job done right the first time, ensuring your truck’s complex electronics communicate perfectly.
Frequently Asked Questions
What exactly does the Transfer Case Control Module do?
The TCCM is the electronic brain of your 4WD system. It receives input from the selector switch on your dash and commands the transfer case motor to shift between 2WD, 4HI, and 4LO. When it fails, this communication breaks down, leaving your system inoperable.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions to send us your 17-digit Vehicle Identification Number (VIN). Our technicians will use this to flash the module with the correct software for your specific truck before we ship it.
Is this part difficult to install?
For most 2007-2014 GM trucks and SUVs, the TCCM is located on the driver’s side of the dashboard, behind the lower dash panel. Installation is straightforward for anyone with basic mechanical skills. It typically involves removing a few trim panels, unplugging the electrical connectors from the old module, unbolting it, and installing the new one in its place. Since our module is pre-programmed, no further steps are needed.
Will this definitely fix the “Service 4WD” light?
While a faulty TCCM is the most common cause for this warning light and the associated symptoms, other issues like a bad transfer case encoder motor or a faulty selector switch can also be the cause. However, if you are experiencing shifting problems along with the light, the module is the primary suspect. This programmed GM transfer case control module is the most common and effective solution.
Does this module fit my specific vehicle?
This module fits a wide range of GM trucks and SUVs from 2007-2014, including the Sierra 1500/2500/3500, Silverado 1500/2500/3500, Suburban, Tahoe, Yukon, and Avalanche. Please refer to the detailed fitment list on this page to confirm compatibility with your specific year, make, and model.