Buick 2004 Regal Owner's Manual page 200

If the vehicle is going to carry a heavy load, spread it
out. Do not carry more than 167 lbs (75 kg) in your trunk.
CAUTION:
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Do not load your vehicle any heavier than the
GVWR, or either the maximum front or rear
GAWR. If you do, parts on your vehicle can
break, and it can change the way your vehicle
handles. These could cause you to lose
control and crash. Also, overloading can
shorten the life of your vehicle.
Notice: Overloading your vehicle may cause
damage. Repairs would not be covered by your
warranty. Do not overload your vehicle.
If things like suitcases, tools, packages or any thing else
are put inside the vehicle, 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.
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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.
•
Do not leave a seat folded down unless
you need to.