GMC 1996 Savana Van Owner's Manual page 175

The CertificatiodTire label also tells you the maximum
weights for the front and rear axles, called Gross Axle
Weight Rating (GAWR). To fine out the actual loads
on your front and rear axles, you need to go to a weigh
station and weigh your vehicle. Your dealer can help
you with this. Be sure to spread out your load equally
on both sides of the centerline.
Never exceed the GVWR for your vehicle, or the
GAWR for either the front or rear axle.
And, if you do have a heavy load, you should spread
it out.
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, or it can change the way your
vehicle handles. These could cause you to lose
control. Also, overloading can shorten the life
Things you put inside your vehicle can strike
and injure people in a sudden stop or turn,
or
in a crash.
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Put things in the cargo area of your vehicle.
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.
Don't leave an unsecured child restraint in
your vehicle.
When you carry something inside the
vehicle, secure it whenever you can.
Don't leave a seat folded down unless you
need to.
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