AWD transfer case

Provides an automatic 4WD setting that is ideal when road surface traction conditions vary. When the AUTO setting is selected on the transfer case dial, the vehicle operates in Two-Wheel Drive High with the front axle engaged. When the system detects wheel slippage, it responds within a fraction of a second, automatically sending drive power to both the front and rear wheels to help enhance traction. When traction is regained, power returns to the rear wheels. It's seamless and allows drivers to concentrate more on the road ahead. 

This feature requires an AWD 1500 Denali model equipped with the Vortec 6.2L engine.