Restore Full Control Over Your 4-Wheel Drive System
Is the dreaded “Service 4WD” light illuminated on your dashboard? Are you unable to switch between 2WD and 4WD, or hearing unusual noises from your transfer case? These are classic signs of a failing Transfer Case Control Module (TCCM). Don’t let a faulty module compromise the capability and safety of your truck or SUV. This is the direct, simple, and reliable solution to restore your vehicle’s all-weather, all-terrain confidence without a costly trip to the dealership.
Common Symptoms & Your Solution
A failing TCCM can cause a host of frustrating issues. If you’re experiencing any of the following, this module is the definitive fix you need:
- “Service 4WD” or “Service Four Wheel Drive” message on the dash
- Inability to shift the transfer case into or out of 4-High, 4-Low, or Auto modes
- Selector switch lights are blinking or not illuminating correctly
- Diagnostic Trouble Codes (DTCs) such as C0306, C0321, C0327, or others related to the transfer case
- Delayed or harsh engagement of the 4WD system
This Programmed 24241970 Transfer Case Control Module is engineered to resolve these problems by replacing the faulty electronic brain of your 4WD system with a fully updated and vehicle-specific unit.
Features & Tangible Benefits
- โ VIN-Specific Programming Included: We flash the module with the latest official GM software using your vehicle’s VIN before it ships. This means it arrives ready for a true plug-and-play installation, saving you hundreds in dealership programming fees.
- โ Restored 4WD Functionality: Regain complete and reliable control over your 4×4 system. Switch between modes smoothly and confidently, knowing your truck or SUV is ready for any road condition.
- โ Direct-Fit OEM Compatibility: Engineered to be a perfect replacement for a wide range of original part numbers, ensuring a hassle-free installation with factory mounting points and connectors.
- โ Eliminate Annoying Warning Lights: Clear the “Service 4WD” message and restore your dashboard to a clean, warning-free state for total peace of mind.
- โ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
Expert Mechanic’s Insight
As a technician, I’ve seen countless GMT900-platform trucks and SUVs with these exact 4WD issues. Often, the original TCCM fails due to internal circuit board corrosion from moisture intrusion or from software glitches that were never addressed from the factory. Simply grabbing a used module from a salvage yard is a gambleโit will still require expensive programming and likely has the same inherent flaws. This Programmed 24241970 Transfer Case Control Module is the superior choice because it’s loaded with the newest, most stable software from GM, correcting those original bugs and ensuring long-term reliability for your 4WD system.
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 your part until we receive the VIN, as this information is essential for the programming service.
Will this part fix the “Service 4WD” light?
In the vast majority of cases, a faulty TCCM is the root cause of the “Service 4WD” light and the associated symptoms. As long as the issue is not with another component, such as the transfer case motor or the selector switch, this module is designed to be the definitive solution.
Is this part difficult to install?
No, this is a straightforward repair for a DIYer with basic tools. The TCCM is typically located under the driver’s side dashboard to the left of the steering column. It involves unplugging a few electrical connectors and removing the module from its bracket. Since our unit is pre-programmed, no special electronic tools are needed.
What is a TCCM and what does it do?
The Transfer Case Control Module (TCCM) is a small computer that acts as the brain for your vehicle’s 4-wheel drive system. It takes input from the driver (via the 4WD selector switch) and various vehicle sensors to command the transfer case motor, which physically shifts the system between 2WD and 4WD modes.
Does this module fit models with the NQH and NQF transfer case options?
Yes, this module is compatible with a wide range of GM trucks and SUVs from this era, including those equipped with the RPO code NQH (Autotrac 2-speed active transfer case) and NQF (2-speed, electronic shift transfer case). The VIN-specific programming ensures it works perfectly with your vehicle’s exact configuration.