2008 Suzuki Grand Vitara Owner's Manual - Page 170
2008 Suzuki Grand Vitara Manual
Page 170 highlights
OPERATING YOUR VEHICLE 4H LOCK (4-wheel drive high range center differential lock) In this position, engine power is supplied to the front and rear axles and you get better traction than when driving in "4H". Use this position when you need better traction than "4H" provides, such as when driving on slippery roads etc. 64J221 6-11
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6-11
OPERATING YOUR VEHICLE
4H LOCK (4-wheel drive high range center differential lock)
64J221
In this position, engine power is supplied to
the front and rear axles and you get better
traction than when driving in “4H”. Use this
position when you need better traction
than “4H” provides, such as when driving
on slippery roads etc.