Restore Your Truck’s 4WD Capability Instantly
Is that frustrating “Service 4WD” light glaring at you from the dashboard of your 2008-2013 Chevy Avalanche? Are you unable to switch between 2WD and 4WD, leaving you unprepared for bad weather or tough terrain? You’ve likely pinpointed the problem: a failed Transfer Case Control Module (TCCM). As a technician with over 20 years of experience, I’ve seen this exact issue countless times on the GMT900 platform. The TCCM is the electronic brain of your four-wheel-drive system, and when it fails, it can leave your truck’s capabilities severely limited.
This isn’t just a part; it’s a complete, ready-to-install solution. We take a genuine GM-spec module and flash it with the latest, most stable software directly from GM. By providing your Vehicle Identification Number (VIN) at checkout, you receive a module that is 100% plug-and-play. This means no expensive trip to the dealership for programming, no special scan tools required, and no hidden fees. You can get your truck back to full operational status right in your own garage.
Case Study: A Tricky Diagnosis
A customer brought in his ’11 Silverado 2500, convinced he needed a new transfer case encoder motor. His 4×4 switch was unresponsive, and another shop quoted him nearly $800 for the motor replacement. My first step, as always, was to pull the codes. I found a U0100 (Lost Communication with ECM/PCM) and a C0569 (System Configuration Error) stored in the TCCM. These codes rarely point to the motor itself. Instead, they indicate a communication breakdown, often originating within the module. We swapped in one of our pre-programmed TCCMs, and in under 15 minutes, the 4WD system was fully functional. He saved over $500 and a lot of unnecessary work by correctly diagnosing the electronic failure first.
Is Your Truck Showing These Symptoms?
- ✔ “Service 4WD” or “Service Four Wheel Drive” message is always on.
- ✔ Inability to shift into or out of 4-High, 4-Low, or Auto 4WD.
- ✔ The 4×4 selector switch lights do not illuminate or flash without engaging.
- ✔ The vehicle feels stuck in one drive mode (e.g., 4-Low).
- ✔ Common Diagnostic Trouble Codes (DTCs) stored, such as C0306, C0327, C0374, or U0100.
A Straightforward Guide to Installation
Replacing the TCCM on these GM trucks is a job most DIYers can handle in under 30 minutes with basic hand tools. This guide for the 2008-2013 Avalanche 1500 TCCM is also applicable to most similar GM trucks and SUVs.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: The TCCM is typically located on the driver’s side of the dashboard, up and to the left of the steering column, often attached to a metal bracket. You may need to remove the lower dash panel for access.
- Disconnect Wiring: Carefully unplug the electrical connectors from the old module. There are usually two or three harnesses. Press the release tabs firmly to avoid breaking them.
- Remove the Old Module: Unbolt the TCCM from its mounting bracket. It’s usually held in place by a few small bolts or nuts (commonly 7mm or 10mm).
- Install the New Module: Mount your new, pre-programmed TCCM onto the bracket and secure it. Reconnect the electrical harnesses—they are keyed and will only fit in their correct slots.
- Final Steps: Reinstall any dash panels you removed and reconnect the negative battery terminal. Start the vehicle and test the 4WD selector switch to confirm proper operation. The “Service 4WD” light should be off.
Verified Vehicle Compatibility
This module, part number 24243085, is a direct replacement for a wide range of GM trucks and SUVs. It is also a compatible replacement for part numbers 24261367, 12588096, 24239190, and others listed in the original description. Please verify your vehicle is on this list:
Avalanche 1500 (2008-2013)
Silverado 1500 (2007 New Body Style – 2013)
Silverado 2500/3500 (2007 New Body Style – 2014)
Suburban 1500 (2008-2014)
Suburban 2500 (2008-2013)
Tahoe (2008-2014)
GMC:
Sierra 1500 (2007 New Body Style – 2013)
Sierra 2500/3500 (2007 New Body Style – 2014)
Sierra Denali (2007-2010)
Sierra Denali 2500/3500 (2011-2014)
Yukon / Yukon XL 1500 (2007-2014)
Yukon XL 2500 (2008-2013)
Frequently Asked Questions
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, absolutely. The VIN is required to load the correct GM software and vehicle-specific calibrations for your truck’s options (axle ratio, tire size, etc.). This ensures it works perfectly out of the box.
Is this a difficult part to install myself?
Not at all. For most owners with basic hand tools, this is a simple 30-minute job. It’s located under the driver’s side dash and is easily accessible once the lower trim panel is removed.
Will this fix my ‘Service 4WD’ light?
In the vast majority of cases where the TCCM is faulty, this part will resolve the issue and turn off the warning light. However, we always recommend a proper diagnosis to rule out other issues like a bad encoder motor or selector switch.
What if I order and it doesn’t solve my problem?
We stand behind our parts. If the module doesn’t fix your issue, you may have a different problem in your 4WD system. Contact us, and our expert support team can help you with further diagnostic steps.
Is this a new or used part?
This is a high-quality, inspected, and tested module that is guaranteed to perform to OEM standards. Each unit is programmed with the latest software available from GM for your specific vehicle.