Restore Your Truck’s 4WD Capability with a Reliable, Pre-Programmed Module
Is your Sierra Denali flashing a ‘Service 4WD’ message? Are you unable to switch between 2WD, 4-High, and 4-Low? Don’t let a faulty Transfer Case Control Module (TCCM) leave you stranded. As a technician with over 20 years of experience, I’ve seen countless GM trucks sidelined by this exact issue. The TCCM is the electronic brain of your four-wheel-drive system, and when it fails, it disrupts the communication between your dash switch and the transfer case itself, leaving your truck’s off-road and all-weather capabilities completely disabled.
This isn’t just an inconvenience; it’s a reliability issue. You bought a powerful truck like the Sierra Denali 2500 for its go-anywhere strength. This module is the definitive solution to restore that confidence. We take the guesswork and high dealership costs out of the repair. Simply provide your vehicle’s VIN during checkout, and we will program this module with the latest, most stable GM software specific to your truck. It arrives at your door ready for a simple, plug-and-play installation, getting you back on the road—or off the trail—in no time.
Case Study: A Tricky Diagnosis
I remember a 2012 Sierra 2500 that came into my bay. The owner was frustrated because his 4WD indicator lights were just flashing, and nothing would engage. He had already replaced the expensive encoder motor on the transfer case, but the problem persisted. A quick scan showed communication loss codes (U-codes) pointing towards the module. The TCCM, located behind the driver’s side dash, had failed internally due to voltage spikes—a common issue. We installed a VIN-programmed module, and in less than 30 minutes, the 4WD system was operating perfectly. This story highlights why it’s crucial to diagnose correctly; often, the module is the root cause, and our pre-programmed unit is the most efficient fix.
Is Your Truck Showing These Symptoms?
- ✔ ‘Service 4WD’ or ‘Service Four Wheel Drive’ message on the instrument cluster.
- ✔ Inability to shift the transfer case into or out of 4-High or 4-Low.
- ✔ 4WD selector switch lights flash but do not stay solid.
- ✔ Vehicle is stuck in 2WD or 4WD mode.
- ✔ Diagnostic Trouble Codes (DTCs) such as C0306, C0321, C0327, or various U-codes pointing to a loss of communication with the TCCM.
A Straightforward Guide to Installation
Installing your new 2011-2014 Sierra 2500 TCCM is a simple process that most DIYers can complete in under an hour with basic hand tools. Because it’s pre-programmed, no special electronic tools are needed.
- 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, up under the dashboard to the left of the steering column. You may need to remove the lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt it from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCCM into place and securely reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reinstall any trim panels you removed and reconnect the negative battery terminal. Start the truck and test the 4WD system by cycling through the modes.
Guaranteed Fitment for Your GM Truck
This module, part number 24249095, is a direct replacement for a wide range of GM vehicles and supersedes multiple older part numbers, including 24261367, 12588096, 24239190, and more. Please confirm your vehicle is on the list below for guaranteed compatibility.
SIERRA 1500 PICKUP 07 Transfer Case; new style (smooth door skin), (LH dash), transfer case opt NQH
SIERRA 1500 PICKUP 08-13 Transfer Case; (LH dash)
SIERRA 2500 PICKUP 07 Transfer Case; new style (smooth door skin), (LH dash), transfer case opt NQF
SIERRA 2500 PICKUP 08-14 Transfer Case; (LH dash)
SIERRA 3500 PICKUP 07 Transfer Case; new style (smooth door skin), (LH dash)
SIERRA 3500 PICKUP 08-14 Transfer Case; (LH dash)
SIERRA DENALI 07-10 Transfer Case; (LH dash)
SIERRA DENALI 2500 11-14 Transfer Case; (LH dash)
SIERRA DENALI 3500 11-14 Transfer Case; (LH dash)
SILVERADO 1500 PICKUP 07 Transfer Case; new style (smooth door skin), (LH dash), transfer case opt NQH
SILVERADO 1500 PICKUP 08-13 Transfer Case; (LH dash)
SILVERADO 2500 PICKUP 07 Transfer Case; new style (smooth door skin), (LH dash), transfer case opt NQF
SILVERADO 2500 PICKUP 08-14 Transfer Case; (LH dash)
SILVERADO 3500 PICKUP 07 Transfer Case; new style (smooth door skin), (LH dash)
SILVERADO 3500 PICKUP 08-14 Transfer Case; (LH dash)
SUBURBAN 1500 08-14 Transfer Case; (LH dash)
SUBURBAN 2500 08-13 Transfer Case; (LH dash)
TAHOE 08-14 Transfer Case; (LH dash)
YUKON 07 Transfer Case; (LH dash), Denali
YUKON 08-14 Transfer Case; (LH dash)
YUKON XL 1500 07 Transfer Case; (LH dash), Denali
YUKON XL 1500 08-14 Transfer Case; (LH dash)
YUKON XL 2500 08-13 Transfer Case; (LH dash)
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. We handle all the programming for you before shipment. We use your VIN to load the correct GM software, so it’s ready for installation right out of the box.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship the part until we receive and program it with your VIN.
What does the Transfer Case Control Module (TCCM) do?
The TCCM is a small computer that acts as the command center for your 4WD system. It takes the input from your dash switch and sends signals to the transfer case encoder motor to shift between 2WD, 4HI, and 4LO.
Where is the TCCM located on my 2013 Sierra 2500?
On most 2007-2014 GM trucks and SUVs, including the Sierra, the TCCM is mounted under the dashboard on the driver’s side, to the left of the steering column.
Is this part compatible with other part numbers?
Yes, this module replaces numerous previous GM part numbers, including 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, and 24252878.