If so equipped, you can activate four-wheel drive (4WD) on your new Chevy Suburban using the transfer case control switches. In a modern Chevy Suburban, these controls should be located to the left of the gauge cluster, below the air vent. You’ll see buttons that say “2” or “4” with an arrow pointing up or down. These buttons will correspond to 2HI, 4HI, and 4LO, respectively. Use the knob next to these buttons to activate your desired 4WD setting.