Regain Control of Your 4WD System
Is that frustrating “Service 4WD” light glaring at you from the dashboard of your 2008-2013 Avalanche 1500? Are you unable to switch between 2WD, 4WD High, and 4WD Low, leaving you unprepared for changing road conditions? You’re not alone. The Transfer Case Control Module (TCCM) is the electronic brain of your truck’s four-wheel-drive system, and when it fails, it can leave your vehicle’s capabilities seriously compromised. In my 20+ years of experience, I’ve seen countless GM trucks sidelined by a faulty TCCM, often due to internal electronic failure or software corruption.
This isn’t just an inconvenience; it’s a matter of safety and utility. A non-responsive 4WD system means no extra traction in snow, mud, or on slippery boat ramps. But the fix doesn’t have to involve expensive diagnostic fees and a lengthy stay at the dealership. We provide a reliable, direct-fit solution: a TCCM that arrives at your door fully programmed to your truck’s specific Vehicle Identification Number (VIN). This 2008-2013 Avalanche 1500 TCCM is flashed with the latest stable software from GM, ensuring seamless communication and restored functionality right out of the box.
From the Diagnostic Bay
I remember a customer last winter with a 2012 Sierra, nearly identical in its 4WD system to the Avalanche. He was heading for the mountains for a ski trip, and his 4WD quit the day before he was set to leave. The selector switch lights were out, and the truck was stuck in 2WD. He feared the worst—a failed transfer case. After plugging in my scan tool, I found code U0102, ‘Lost Communication with Transfer Case Control Module.’ We checked the fuses and wiring, which were all fine. This pointed directly to an internal failure of the TCCM. Instead of a multi-day, thousand-dollar repair at the dealer, we installed a VIN-programmed module just like this one. In under 30 minutes, his 4WD was fully operational, and he made his trip safely. It’s a classic failure, and this is the most effective fix.
Is Your Truck Showing These Symptoms?
- ✔ The “Service 4WD” or “Service Four Wheel Drive” message is illuminated on your dash.
- ✔ You are unable to shift the transfer case into or out of 4-High, 4-Low, or Auto modes.
- ✔ The indicator lights on your 4WD selector switch do not light up or flash without engaging.
- ✔ You hear unusual clicking or grinding noises when attempting to shift drive modes.
- ✔ Your scanner shows diagnostic trouble codes (DTCs) such as C0327, C0398, or U0102.
- ✔ The 4WD system seems to engage or disengage randomly on its own.
A Straightforward Guide to Installation
One of the biggest benefits of our VIN-programmed module is the simple installation. You don’t need specialized computers or a trip to the dealer. Just basic hand tools and about 30 minutes.
- 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 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 and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be pressed. Once disconnected, unbolt or unclip the old TCCM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed TCCM in the same location. Securely plug in the electrical connectors until they click into place.
- Final Steps: Reinstall any trim panels you removed and reconnect the negative battery terminal. Start the truck and test your 4WD selector switch—you should see the indicator lights function correctly as you cycle through the modes.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of GM trucks and SUVs. It is engineered to work seamlessly with vehicles that came equipped with part number 24243084 or any of the compatible part numbers listed below. Please provide your VIN upon purchase to guarantee perfect programming for your specific vehicle.
Compatible Part Numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, 24252878
Fits the following models with the transfer case control module located on the left-hand side of the dash:
- AVALANCHE 1500: 2008-2013
- SIERRA 1500 PICKUP: 2007 (New Body Style), 2008-2013
- SIERRA 2500/3500 PICKUP: 2007 (New Body Style), 2008-2014
- SIERRA DENALI: 2007-2010
- SIERRA DENALI 2500/3500: 2011-2014
- SILVERADO 1500 PICKUP: 2007 (New Body Style), 2008-2013
- SILVERADO 2500/3500 PICKUP: 2007 (New Body Style), 2008-2014
- SUBURBAN 1500: 2008-2014
- SUBURBAN 2500: 2008-2013
- TAHOE: 2008-2014
- YUKON & YUKON XL 1500: 2007 (Denali), 2008-2014
- YUKON XL 2500: 2008-2013
Frequently Asked Questions
What does the Transfer Case Control Module (TCCM) do?
The TCCM is a small computer that receives input from the driver (via the 4WD selector switch) and sensors on the vehicle. It then commands the transfer case encoder motor to shift the transfer case between 2WD, 4WD, and Auto modes, controlling your truck’s four-wheel-drive system.
Why is VIN programming so important for this part?
VIN programming ensures the module has the correct software and settings for your truck’s specific options, like the type of transfer case (e.g., NQH, NQF) and other vehicle systems it communicates with. Without it, the module won’t work correctly, and you’d need a dealer to program it, adding cost and hassle. We do it for you before we ship.
Where is this module located on my 2013 Avalanche 1500?
On the 2008-2013 Avalanche 1500 and similar GM trucks/SUVs, the TCCM is mounted behind the dashboard on the driver’s side, typically up high to the left of the steering column. Access usually requires removing the lower dash knee bolster panel.
Could my problem be the 4WD switch or the encoder motor instead?
Yes, it’s possible. However, symptoms like a completely dead selector switch, no communication codes (U-codes), and an inability to shift are classic signs of TCCM failure. A faulty encoder motor often makes grinding noises, while a bad switch might have one non-working button. A failed TCCM is the most common point of failure in this system.
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We will program the module with the latest GM software matched to your vehicle before shipping it out.