2006 GMC Envoy Owner's Manual - Page 107

Four-Wheel Drive If your vehicle has four-wheel drive, the engine's driving power can be sent to all four wheels for extra traction. To get the most satisfaction out of four-wheel drive, you must be familiar with its operation. Read the part that follows before using four-wheel drive. You should use Two-Wheel High for most normal driving conditions. Notice: Driving on clean, dry pavement in Four-Wheel-Drive High or Four-Wheel-Drive Low for an extended period of time may cause premature wear on your vehicle's powertrain. Do not drive on clean, dry pavement in Four-Wheel-Drive High or Four-Wheel-Drive Low for extended periods of time. Automatic Transfer Case Your vehicle will have one of the following transfer case knobs. If your vehicle has four-wheel drive, the transfer case knob is located to the right of the steering wheel on the instrument panel. Use this knob to shift into and out of four-wheel drive. 2-27