2005 Chevrolet Silverado 3500 Pickup Owner's Manual - Page 131

Excessively shifting the transfer case into or out of the different modes may cause the transfer case to enter the shift protection mode. This will protect the transfer case from possible damage and will only allow the transfer case to respond to one shift per 10 seconds. The transfer case may stay in this mode for up to three minutes. Use these switches to shift into and out of four-wheel drive. You can choose among three driving settings: Recommended Transfer Case Settings Driving Conditions Normal Severe Extreme Vehicle in Tow* *See Recreational Vehicle Towing on page 4-63 or Towing Your Vehicle on page 4-62 for further information. Transfer Case Settings 2HI YES YES YES YES 4HI 4LO N Electronic Transfer Case If your four-wheel-drive vehicle has the electronic transfer case, the transfer case switches are located to the left of the instrument panel cluster. h (2HI): This setting is for driving in most street and highway situations. Your front axle is not engaged in two-wheel drive. This setting engages your front axle to help drive your vehicle. Use 4HI when you need extra traction, such as on snowy or icy roads, or in most off-road situations. G (4HI): 2-45