2008 Hummer H3 Owner's Manual - Page 102

Transfer Case Buttons Notice: Driving on pavement in Four-Wheel High Lock or Four Wheel Low Lock for extended periods may cause premature wear on your vehicle's powertrain and tires. Do not drive in Four-Wheel High Lock or Four-Wheel Low Lock on pavement for extended periods. 4 mQ (Four-Wheel-High Lock): Use this mode when you need extra traction in most off-road situations such as sand, mud, snow or level, rocky trails. The transfer case buttons are located to the right of the instrument panel cluster. Use these switches to shift into and out of the different Full-Time Four-Wheel Drive modes. You can choose between four modes: 4 m(Four-Wheel High): This setting is used for driving in most street and highway situations. You can also use this setting for light or variable off-road conditions. N (NEUTRAL): Shift the vehicle's transfer case to NEUTRAL only when towing your vehicle. See Recreational Vehicle Towing on page 4-48 or Towing Your Vehicle on page 4-48 for more information. Notice: Operating your vehicle in Four-Wheel-Low Lock above 30 mph (48 km/h) for any extended period of time could cause damage to the transfer case. Do not operate your vehicle in Four-Wheel-Low Lock above 30 mph (48 km/h) for extended periods. 4 nQ (Four-Wheel-Low Lock): This mode delivers extra torque to all four wheels and is used for extreme off-road conditions. You might choose 4-Wheel-Low Lock if you are driving in off-road situations, such as, deep sand, mud, or snow and climbing or descending steep hills. If the vehicle has a locking rear axle, when in this mode you can also choose to lock the rear axle for additional traction in extreme off-road situations. See Locking Rear Axle on page 4-6. 2-28