Restore Your 4WD System with a Reliable, Pre-Programmed TCCM
If you’re staring at that frustrating “Service 4WD” light on the dash of your 2008-2013 GMC Yukon XL 2500, you’re not alone. As a technician with over two decades of experience, I’ve seen countless GM trucks and SUVs roll into the bay with their four-wheel drive systems completely unresponsive. The culprit is often a failed Transfer Case Control Module (TCCM). This small electronic box is the brain of your 4WD system, and when it goes, it can leave you without traction when you need it most.
Don’t get stuck with a hefty dealership bill for diagnostics and programming. We offer a simple, effective solution. This TCCM, part number 24243085, is a direct-fit replacement for your original module. The best part? We program it specifically to your vehicle’s VIN before we ship it. This means it arrives at your door ready for a straightforward installation, loaded with the latest GM software updates to ensure flawless communication and performance. You get a reliable fix without the dealership hassle.
A Technician’s Notebook: The Intermittent 4WD Gremlin
I remember a 2011 Sierra 2500 that was a real head-scratcher. The owner said his 4WD would work one day and not the next. No check engine light, but the “Service 4WD” message would pop up randomly. We checked the encoder motor, the selector switch, and all the wiring—everything seemed fine. On a hunch, I tapped the TCCM under the dash while my colleague tried to switch modes. Suddenly, it engaged. The module had an internal cold solder joint that was failing intermittently with temperature changes and vibration. Replacing the faulty Yukon XL 2500 TCCM with a pre-programmed unit solved the problem for good. These intermittent issues are classic signs of TCCM failure.
Common Symptoms of a Failing TCCM
- âś” “Service 4WD” or “Service Four Wheel Drive” message on the instrument cluster.
- âś” Inability to switch between 2WD, 4-High, 4-Low, or Auto 4WD modes.
- âś” The 4WD selector switch lights are off or flash without engaging.
- âś” The 4WD system gets stuck in one mode.
- âś” Diagnostic Trouble Codes (DTCs) stored in the system, such as C0327, C0306, C0374, or U0102 (Lost Communication with TCCM).
- âś” A noticeable clunking or grinding noise when attempting to engage the transfer case.
Your Straightforward TCCM Installation Guide
Installing your new TCCM is a job most DIYers can handle in under an hour with basic hand tools. This guide is for a typical Yukon XL 2500 TCCM replacement; exact steps may vary slightly by model.
- 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, to the left of the steering column, often mounted to a metal bracket. You may need to remove the lower dash panel for access.
- Disconnect the Old Module: Carefully unplug the electrical connectors from the old TCCM. There are usually two or three connectors with locking tabs that need to be depressed.
- Remove the Old Module: Unbolt the old module from its mounting bracket. It’s usually held in place by a couple of small bolts or nuts (often 7mm or 10mm).
- Install the New Module: Mount your new, pre-programmed TCCM onto the bracket and secure it with the bolts/nuts.
- Reconnect Everything: Plug the electrical connectors firmly into the new module. You should hear a click as they lock into place. Reinstall the lower dash panel.
- Final Step: Reconnect the negative battery terminal. Start the vehicle and test the 4WD selector switch to confirm proper operation.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for a wide range of GM vehicles and is compatible with numerous part numbers, including 24261367, 12588096, and 24243085. Please provide your VIN upon purchase to ensure perfect programming. It fits the following models:
- AVALANCHE 1500: 2008-2013
- SIERRA 1500 PICKUP: 2007 (New Body Style), 2008-2013
- SIERRA 2500 PICKUP: 2007 (New Body Style), 2008-2014
- SIERRA 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 PICKUP: 2007 (New Body Style), 2008-2014
- SILVERADO 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
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the TCCM with the exact software and calibrations for your Yukon’s specific options (like transfer case type, axle ratio, and tire size). This ensures it works seamlessly right out of the box.
Is this a plug-and-play part?
Yes! Because we program it to your VIN before shipping, no further programming or dealer visits are required. Simply install it, and your 4WD system should be fully operational.
Will this fix my ‘Service 4WD’ light?
In the vast majority of cases, a faulty TCCM is the cause of the ‘Service 4WD’ light on these GM trucks. While other issues can cause this light (like a bad encoder motor or selector switch), the module is the most common point of failure.
Do I need any special tools for installation?
No special tools are needed. Basic hand tools like a socket set and a screwdriver are all that’s typically required to access and replace the module located under the driver’s side dashboard.
What if I have a different part number on my old module?
This module replaces a long list of original GM part numbers, including 24261367, 12588096, 24239190, and more. As long as your vehicle is on the compatibility list, this module will work once programmed to your VIN.