GMC 1994 Yukon Owner's Manual page 306

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.
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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