Regain Control of Your Truck’s 4×4 System
Is your truck flashing a ‘Service 4WD’ message? Are you unable to switch between 2WD and 4WD, or hearing strange noises from the transfer case? You’re not alone. As a technician with over 20 years of experience, I’ve seen these symptoms countless times, and the cause is often a failed Transfer Case Control Module (TCCM). This module is the electronic brain of your four-wheel-drive system, and when it fails, it can leave you stuck in one mode, unable to adapt to changing road or work conditions. Don’t let a faulty module sideline your capable truck.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We take a genuine GM-spec TCCM and professionally flash it with the latest, most stable software updates directly from General Motors. By providing your vehicle’s VIN at checkout, you receive a module that is 100% plug-and-play. This critical step eliminates the need for an expensive trip to the dealership for programming, saving you both time and money. Restore your truck’s functionality and peace of mind with a reliable, ready-to-install module.
Common Signs of a Failing TCCM
- âś” ‘Service 4WD’ or ‘Service Four Wheel Drive’ light illuminated on the dashboard.
- âś” Inability to shift the transfer case into or out of 4HI, 4LO, or Auto 4WD.
- âś” The selector switch lights do not illuminate or flash without engaging.
- âś” Grinding or clunking noises during attempted 4WD shifts.
- âś” Communication-related Diagnostic Trouble Codes (DTCs) such as C0306, C0327, C0374, or U0102.
- âś” The vehicle feels like it is stuck or binding in 4WD, especially during tight turns on dry pavement.
From the Diagnostic Bay: A Real-World Repair Story
A customer brought in his 2011 Sierra 1500, frustrated because his truck was completely stuck in 4HI right before a hunting trip. The selector switch was dead, and the ‘Service 4WD’ light was on. A quick scan showed a U-code for lost communication with the TCCM. After verifying power and ground at the module connector under the dash, it was clear the module itself had failed internally—a common issue. In the past, this meant a new module plus a separate, time-consuming dealer appointment for programming. With this pre-flashed unit, we had him back on the road in under 30 minutes. He was thrilled to avoid the dealership hassle and made his trip on time. That’s the real-world value of a ready-to-go part.
A Straightforward Guide to Installation
- âś” Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- âś” Locate the Module: On most 2007-2013 GM trucks and SUVs, the TCCM is located on the driver’s side of the dashboard, typically above and to the left of the brake pedal, secured to a metal bracket.
- âś” Remove the Old Module: Carefully disconnect the electrical connectors. They have locking tabs that need to be depressed. Then, remove the nuts or bolts holding the module to its bracket. A 10mm socket is usually required.
- âś” Install the New Module: Mount your new, pre-programmed TCCM onto the bracket and secure it. Reconnect the electrical connectors, ensuring they click firmly into place.
- âś” Final Steps: Reconnect the negative battery terminal. Turn the ignition to the ‘On’ position (without starting the engine) for 30 seconds to allow the system to initialize. Start the vehicle and test the 4WD selector switch to confirm proper operation through all modes.
Guaranteed Fitment for Your GM Truck or SUV
This module is a direct replacement for part number 24242480 and is compatible with a wide range of GM vehicles. Please verify your model and year below. It also interchanges with part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24243084, 24243085, 24249095, and 24252878.
- âś” AVALANCHE 1500: 2008-2013
- âś” SIERRA 1500 PICKUP: 2007 (New Body Style, Opt NQH), 2008-2013
- âś” SIERRA 2500/3500 PICKUP: 2007 (New Body Style), 2008-2014
- âś” SIERRA DENALI: 2007-2010
- âś” SIERRA DENALI 2500/3500: 2011-2014
- âś” SILVERADO 1500 PICKUP: 2007 (New Body Style, Opt NQH), 2008-2013
- âś” SILVERADO 2500/3500 PICKUP: 2007 (New Body Style), 2008-2014
- âś” SUBURBAN 1500/2500: 2008-2014 (2500 thru 2013)
- âś” TAHOE: 2008-2014
- âś” YUKON & YUKON XL 1500/2500: 2007-2014 (2500 XL thru 2013)
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming myself?
No. This is the biggest benefit of our service. We program the module to your specific vehicle using the VIN you provide. It arrives ready for installation with no further programming required.
How do I provide my VIN?
After you complete your purchase, you will need to send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we receive this information.
Is this a difficult part to install for a DIYer?
Not at all. For most people with basic hand tools, this is a 30-minute job. The module is typically located under the driver’s side dash and is easy to access and swap out.
Will this fix my ‘Service 4WD’ light?
In the vast majority of cases where the TCCM is the root cause, yes. This module will resolve issues stemming from an internal failure of the original TCCM, which is a very common problem on these trucks.
What if my part number is slightly different?
This module replaces a long list of original GM part numbers. As long as your vehicle is on the compatibility list, this part will function correctly, as it is loaded with the correct software for your VIN.