2004 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 129

Automatic Transfer Case The transfer case buttons are located to the left of the instrument panel cluster. Recommended Transfer Case Settings Transfer Case Settings Driving Conditions Normal Variable Severe Extreme Vehicle in Tow* 2HI YES YES YES YES YES AUTO 4WD 4HI 4LO N *See "Recreational Vehicle Towing" in the Index for further information. Use these switches to shift into and out of four-wheel drive. You can choose among four driving settings: h(2HI): This setting is used for driving in most street and highway situations. Your front axle is not engaged in two- wheel drive. This setting also provides the best fuel economy. AUTO 4WD: This setting is ideal for use when road conditions are variable. When driving your vehicle in AUTO 4WD, the front axle is engaged, but the vehicle's power is sent to the rear wheels. When the vehicle senses a loss of traction, the system will automatically engage four-wheel drive. Driving in this mode results in slightly lower fuel economy than 2HI. 2-37