GMC SIERRA 1994 Manual page 316

A
CAUTION:
In the case of a sudden stop or collision, things carried in the bed
of your truck could shift forward and come into the passenger
area, injuring you and others. If you put things in the bed of
your truck, you should make sure they are properly secured.
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CAUTION:
Do not load your vehicle any heavier than the GVWR or the
maximum front and rear GAWRs. 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 Iife of your vehicle.
Using heavier suspension components to get added durability might not
change your weight ratings. Ask your dealer to help you load your vehicle
the right way.
NOTICE:
Your warranty does not cover parts or components that fail
because of overloading.
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'll keep going.
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