Restore Full Control of Your 4WD System
If you’re staring at a persistent “Service 4WD” light on your 2008-2013 Suburban 2500, you know the frustration. The inability to reliably switch between 2WD, 4-HI, and 4-LO isn’t just an inconvenience—it’s a safety concern that can leave you stranded. This Transfer Case Control Module (TCCM), part number 24241970, is the definitive solution. It acts as the brain for your four-wheel-drive system, and when it fails, communication breaks down. We solve the biggest hurdle of replacement by pre-programming this module to your vehicle’s specific VIN. This means no expensive trip to the dealership for calibration. It arrives at your door ready for a straightforward installation, loaded with the latest GM software updates for optimal performance.
From the Diagnostic Bay: The Intermittent 4WD Ghost
A customer brought in a 2011 Suburban 2500 with a classic complaint: the 4WD system worked one day and not the next. The selector switch lights would flash but never engage, and the “Service 4WD” message was a frequent visitor. After checking the basics—encoder motor, actuator, and wiring—my scan tool pointed to intermittent communication loss with the TCCM (a common U-code fault). These modules are notorious for internal circuit board failures caused by heat cycles and vibration. We swapped in a VIN-programmed TCCM, and the problem was solved in under 30 minutes. The customer avoided a costly diagnostic runaround and left with a truck that was reliable in any weather.
Is Your Suburban Showing These 4WD Warning Signs?
- ✔ “Service 4WD” or “Service Four Wheel Drive” message illuminated on the dash.
- ✔ Inability to shift into or out of 4-HI, 4-LO, or 2WD.
- ✔ Selector switch lights flash but the system does not engage.
- ✔ The vehicle feels stuck in one drive mode, regardless of switch position.
- ✔ Diagnostic Trouble Codes (DTCs) such as C0327, C0398, or various U-codes pointing to a loss of communication.
- ✔ Grinding or clunking noises during attempted shifts of the transfer case.
A Straightforward Guide to Your TCCM Installation
Getting your 2008-2013 Suburban 2500 TCCM installed is a job most DIYers can handle with basic tools. Since we program it beforehand, you can skip the dealership visit.
- Safety First: Always 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, up under the dashboard to the left of the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have release tabs that need to be pressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCCM into place. Securely plug in the electrical connectors, ensuring they click to confirm a solid connection.
- Final Steps: Reinstall any trim panels you removed and reconnect the negative battery terminal. Start the vehicle and test the 4WD selector switch to confirm proper operation.
Will This Module Fit My GM Truck or SUV?
This module is a direct replacement for a wide range of GM vehicles and supersedes multiple part numbers, ensuring broad compatibility. Please verify your vehicle is on this list. This module is compatible with part numbers: 24261367, 12588096, 24239190, 24240487, 24241143, 24241970, 24242480, 24243084, 24243085, 24249095, and 24252878.
- AVALANCHE 1500 2008-2013
- SIERRA 1500 PICKUP 2007 (New Body Style, Opt NQH)
- SIERRA 1500 PICKUP 2008-2013
- SIERRA 2500 PICKUP 2007 (New Body Style, Opt NQF)
- SIERRA 2500 PICKUP 2008-2014
- SIERRA 3500 PICKUP 2007 (New Body Style)
- SIERRA 3500 PICKUP 2008-2014
- SIERRA DENALI 2007-2010
- SIERRA DENALI 2500/3500 2011-2014
- SILVERADO 1500 PICKUP 2007 (New Body Style, Opt NQH)
- SILVERADO 1500 PICKUP 2008-2013
- SILVERADO 2500 PICKUP 2007 (New Body Style, Opt NQF)
- SILVERADO 2500 PICKUP 2008-2014
- SILVERADO 3500 PICKUP 2007 (New Body Style)
- SILVERADO 3500 PICKUP 2008-2014
- SUBURBAN 1500 2008-2014
- SUBURBAN 2500 2008-2013
- TAHOE 2008-2014
- YUKON & YUKON DENALI 2007-2014
- YUKON XL 1500 & DENALI 2007-2014
- YUKON XL 2500 2008-2013
Frequently Asked Questions
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 cannot ship the module until we receive this information.
Is any additional programming needed after installation?
No. This module is fully programmed to your vehicle using the latest GM software. It is designed to be a plug-and-play solution, requiring no further action from a dealer or mechanic.
What if this part doesn’t fix my problem?
While this TCCM corrects the most common causes of 4WD failure, other components like the encoder motor or selector switch can also be at fault. We recommend proper diagnosis before ordering. We do offer a return policy for uninstalled parts.
Is this a new or used part?
This is a high-quality, inspected component that has been tested and certified for function before being programmed with new GM software. It is guaranteed to restore the function of your 4WD system.
Will this fix my specific trouble code?
This module directly addresses failures that cause codes like C0327 and various communication (U-prefix) codes related to the TCCM. If you have confirmed the module is the source of the fault, this part is the correct fix.