How do you reset the service 4 wheel light on 2001 gmc Yukon?

To reset the service 4-wheel drive light on a 2001 GMC Yukon, first ensure the vehicle is in park and the ignition is in the "ON" position without starting the engine. Then, press and hold the "4WD" button for about 10 seconds until the light turns off. If the light persists, it may indicate a more significant issue with the 4WD system that requires further inspection. Always consult the owner's manual for specific instructions related to your vehicle.