2009 Hummer H3 Owner's Manual - Page 90

2-24 Features and Controls 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 transfer case to Neutral only when towing the vehicle. See Recreational Vehicle Towing on page 4-40 or Towing Your Vehicle on page 4-40 for more information. Notice: Driving on pavement in Four-Wheel High Lock or Four Wheel Low Lock for extended periods may cause premature wear on the vehicle powertrain and tires. Do not drive in Four-Wheel High Lock or Four-Wheel Low Lock on pavement for extended periods. 4 m Q (Four-Wheel-High Lock): Use this setting when you need extra traction in most off-road situations such as sand, mud, snow or level, rocky trails. Notice: Operating the 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 the vehicle in Four-Wheel-Low Lock above 30 mph (48 km/h) for extended periods. 4 n Q (Four-Wheel-Low Lock): This setting delivers extra torque to all four wheels and is used for extreme off-road conditions. If the vehicle has locking axles, they can be locked for additional traction in extreme off-road situations. See Locking Rear Axle on page 4-8 and Locking Front Axle on page 4-9. Indicator lights in the buttons show which setting the transfer case is in. The indicator lights will come on briefly when the ignition is in ON/RUN. The If the lights do not come on, take the vehicle to your dealer/retailer for service. Full-Time Four-Wheel Drive Full-Time Four-Wheel Drive sends engine power to all four wheels for extra traction. To get the most out of Full-Time Four-Wheel Drive, you must be familiar with its operation. Transfer Case Buttons 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.