Buick Lucerne 2007 Owner's Manual page 312

If you put things inside your vehicle, like suitcases,
tools, packages, or anything else, they will go as
fast as the vehicle goes. If you have to stop or turn
quickly, or if there is a crash, they will keep going.
CAUTION:
{
Things you put inside your vehicle can
strike and injure people in a sudden stop
or turn, or in a crash.
•
Put things in the trunk of your vehicle.
In a trunk, put them as far forward as
you can. Try to spread the weight
evenly.
•
Never stack heavier things, like
suitcases, inside the vehicle so that
some of them are above the tops of
the seats.
•
Do not leave an unsecured child
restraint in your vehicle.
•
When you carry something inside the
vehicle, secure it whenever you can.
312
Automatic Level Control
This feature keeps the rear of your vehicle level as
the load changes. It is automatic, you do not need
to adjust anything. This type of level control is fully
automatic and will provide a better leveled riding
position as well as better handling under a variety
of passenger and loading conditions. An air
compressor connected to the rear shocks will raise
or lower the rear of the vehicle to maintain proper
vehicle height. The system is activated when the
ignition key is turned to RUN and will automatically
adjust vehicle height thereafter. The system may
exhaust (lower vehicle height) for up to ten minutes
after the ignition key has been turned to OFF.
You may also hear the air compressor operating
when the height is being adjusted.