Restore Full 4WD Function to Your GM Truck
As a mechanic with over two decades of experience under the hood, I’ve seen countless Sierra and Silverado owners come into the shop frustrated by that dreaded ‘Service 4WD’ light. Your truck’s four-wheel-drive is a critical feature, whether you’re navigating a snowy road, a muddy job site, or a steep boat ramp. When it fails, your powerful truck suddenly feels limited. The problem often isn’t a major mechanical failure, but a faulty Transfer Case Control Module (TCCM)—the electronic brain of your 4×4 system.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We are offering a genuine quality Transfer Case Control Module, part number 24239190, that comes fully programmed to your truck’s specific Vehicle Identification Number (VIN). This critical step, which normally requires an expensive trip to the dealership and specialized scan tools, is done for you before we ship. The result is a true plug-and-play part that gets you back on the road, and off-road, with confidence.
Case Study: The Intermittent 4WD Fault
A customer brought in his 2011 Sierra 1500 with a perplexing issue. His 4WD would sometimes refuse to engage, and other times it would get stuck in 4-HI. The ‘Service 4WD’ light was on, but the codes were intermittent. After checking the transfer case encoder motor and the selector switch, which both tested fine, we turned our attention to the TCCM. On the surface, the module looked perfect—no corrosion, no damage. However, by monitoring live data, we saw the module would intermittently drop communication. This is a classic sign of internal electronic failure. We replaced it with a VIN-programmed unit like this one, and the problem was solved instantly. The customer saved hundreds by avoiding a dealer diagnosis and programming fee for what was ultimately a 15-minute part swap.
Common Signs of a Failing Transfer Case Module
If your truck is experiencing these issues, a failing TCCM is the most likely culprit. Don’t let a small electronic module sideline your vehicle. Look for these common symptoms:
- ✔ ‘Service 4WD’ or ‘Service Four Wheel Drive’ message on the instrument cluster.
- ✔ Inability to shift between 2WD, 4-HI, and 4-LO.
- ✔ The 4WD selector switch lights don’t illuminate or flash without engaging.
- ✔ Getting stuck in a particular 4WD mode.
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as C0327, C0398, or U0102 (Lost Communication with TCCM).
A Straightforward Guide to Your TCCM Installation
Replacing the 2007-2013 Sierra 1500 TCCM is a job most DIYers can handle with basic tools. Since we’ve handled the programming, you just need to swap the part.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the Module: The TCCM is typically located on the driver’s side of the vehicle, mounted to a bracket behind the lower dashboard panel, to the left of the steering column.
- Access the Module: You may need to remove the lower dash trim panel (knee bolster) to get clear access. This is usually held in by a few screws and clips.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCCM into place and securely reconnect the electrical connectors. You should hear a ‘click’ as they lock in.
- Final Steps: Reinstall the dash trim panel and reconnect the negative battery terminal. Start the truck and test the 4WD selector switch to confirm proper operation. The ‘Service 4WD’ light should be off.
Verified Vehicle Compatibility List
This module is a direct replacement for a wide range of GM trucks and SUVs. Please verify your vehicle is on this list. This part is compatible with part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, and 24252878.
- AVALANCHE 1500 08-13
- SIERRA 1500 PICKUP 07 (New Body Style, opt NQH)
- SIERRA 1500 PICKUP 08-13
- SIERRA 2500 PICKUP 07 (New Body Style, opt NQF) & 08-14
- SIERRA 3500 PICKUP 07 (New Body Style) & 08-14
- SIERRA DENALI 07-10, SIERRA DENALI 2500/3500 11-14
- SILVERADO 1500 PICKUP 07 (New Body Style, opt NQH) & 08-13
- SILVERADO 2500 PICKUP 07 (New Body Style, opt NQF) & 08-14
- SILVERADO 3500 PICKUP 07 (New Body Style) & 08-14
- SUBURBAN 1500 08-14 & SUBURBAN 2500 08-13
- TAHOE 08-14
- YUKON & YUKON XL 1500 07-14
- YUKON XL 2500 08-13
Frequently Asked Questions
Why do I need to provide my VIN?
Your vehicle’s VIN is required so we can load the correct GM factory software and calibrations for your specific truck. This ensures perfect compatibility with your transfer case, engine, and transmission, making the installation truly plug-and-play.
Is this a difficult part to install myself?
Not at all. For most DIYers with basic hand tools, this is a very straightforward job that takes less than an hour. The module is located behind the driver’s side lower dash, and our guide above walks you through the simple steps.
What happens if I install it without programming?
An unprogrammed TCCM will not work. It won’t be able to communicate with your truck’s other computer systems, and your 4WD will remain inoperative. Our pre-programming service eliminates this entire problem.
Will this fix the ‘Service 4WD’ light?
In the vast majority of cases where the TCCM is the cause of the problem, yes. This module is the most common point of failure for the symptoms listed. If the light remains, there may be a separate issue with a sensor, switch, or the encoder motor.
Is this compatible with my 2007 ‘classic’ body style truck?
No. This module is for the ‘new style’ (smooth door skin) GMT900 platform that began in 2007. Please verify your body style before ordering.