High lock and low lock

[baboon]

Originally Posted by Mr_Pat

4m(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 4-57 or Towing
Your Vehicle on page 4-57 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 your vehicle?s
powertrain and tires. Do not drive in Four-Wheel
High Lock or Four-Wheel Low Lock on pavement for
extended periods.

4mQ(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.
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.

4nQ(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.

thanks bro Seriously I was just about to get the manual from my garage but now I can just sit here instead I tried googling things like "H3 hummer 4 high lock low lock" but was just getting these short consumer review articles.