GMC TopKick 2007 Owner's Manual page 235

Using heavier suspension components to get
added durability might not change the weight
ratings. Ask your dealer to help you load your
vehicle the right way.
Notice: Overloading your vehicle may cause
damage. Repairs would not be covered by your
warranty. Do not overload your vehicle.
If you put things inside your vehicle — like
suitcases, tools, packages, or anything else — they
go as fast as the vehicle goes. If you have to stop or
turn quickly, or if there is a crash, they 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 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.
•
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.
235