Is a ‘Service 4WD’ Light Dimming Your Confidence?
When you rely on your GM truck or SUV, the last thing you want to see is a warning light on the dash, especially one that means your four-wheel drive system is out of commission. If your 4WD selector switch is unresponsive, you’re stuck in 2WD, or you simply can’t trust your vehicle to handle tough conditions, a faulty Transfer Case Control Module (TCCM) is the most common culprit. This isn’t just an inconvenience; it’s a critical failure that can leave you stranded. Get back the capability and peace of mind you depend on with this direct-fit, VIN-programmed TCCM.
Common Symptoms & Your Solution
A failing TCCM can manifest in several frustrating ways. You might be experiencing:
- The dreaded “Service 4WD” or “Service Four Wheel Drive” message on your instrument cluster.
- Inability to switch between 2HI, 4HI, 4LO, or Auto modes.
- The selector switch lights not illuminating or flashing incorrectly.
- Diagnostic Trouble Codes (DTCs) such as C0327, C0398, or various communication U-codes.
This isn’t a problem you have to take to an expensive dealership. Our Programmed 24243084 TCCM is the definitive solution, engineered to restore full function to your vehicle’s 4×4 system. We take the guesswork and hassle out of the repair by pre-programming the module to your specific vehicle using the VIN you provide. It arrives at your door ready for a simple, plug-and-play installation.
Features & Tangible Benefits
- ✔ Plug & Play Installation: This module is professionally programmed to your vehicle’s specific VIN before shipping. No dealer visit, no expensive scan tools, no extra programming fees required.
- ✔ Latest GM Software: We flash each unit with the newest, most stable software updates from General Motors, ensuring optimal performance and correcting known factory bugs.
- ✔ Restored 4WD Functionality: Regain complete and reliable control over your 2WD and 4WD systems, so you’re ready for any road, trail, or weather condition.
- ✔ Cost-Effective Repair: Save hundreds of dollars compared to the combined cost of a new module and dealership programming fees.
- ✔ Broad Compatibility: Replaces a wide range of original part numbers, including 24261367, 12588096, 24243084, 24252878, and more, for a perfect fit on dozens of GM models.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty.
An Expert’s Note on GM 4WD Systems
“I’ve seen countless GMT900-platform trucks and SUVs come through the shop with these exact symptoms. The owner is often stressed, thinking it’s a major mechanical failure in the transfer case itself. In over 90% of these cases, the issue is purely electronic—this TCCM. The original modules were prone to software glitches and internal component failure. By providing a module with updated software tailored to the vehicle’s VIN, we’re not just replacing a part; we’re providing a permanent, reliable fix that gives the owner their truck’s full capability back. It’s one of the most satisfying DIY-friendly repairs a GM owner can perform.”
Don’t let a small electronic module sideline your powerful truck or SUV. Take control of the repair and get your vehicle back to 100% with this ready-to-install Programmed 24243084 TCCM.
Frequently Asked Questions
How does the VIN programming process work?
It’s simple! After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). Our technicians use this number to access the correct GM software and flash the module specifically for your vehicle’s options and configuration. This ensures it works seamlessly right out of the box.
Where do I find my vehicle’s VIN?
Your VIN can be found in several places: on your vehicle’s registration and insurance documents, on a sticker inside the driver’s side door jamb, or on a small plate on the driver’s side of the dashboard, visible through the windshield.
Is this part difficult to install?
For most of the listed GM models, the TCCM is located under the driver’s side dashboard, to the left of the steering column. It’s typically held in by a few clips or small bolts and has a few electrical connectors. For someone with basic mechanical skills, it’s a straightforward installation that can often be completed in under 30 minutes. We always recommend disconnecting the battery before starting.
Will this fix my ‘Service 4WD’ light for sure?
A faulty TCCM is the most common cause for the ‘Service 4WD’ light and the symptoms described. While this module resolves the issue in the vast majority of cases, the light can also be triggered by other problems like a faulty encoder motor, selector switch, or wiring issues. We recommend having the trouble codes read by a scanner to best confirm the diagnosis.
What if I have a different part number on my original module?
This module is a direct replacement for all the part numbers listed in the description, including 24261367, 12588096, 24239190, and many others. GM often consolidates and updates part numbers over time. As long as your original part number is on our compatible list, this unit will work perfectly.