Chevrolet 2012 Tahoe Owner's Manual page 333

Trailering is different than just
driving the vehicle by itself.
Trailering means changes in
handling, acceleration, braking,
durability and fuel economy.
Successful, safe trailering takes
correct equipment, and it has to be
used properly.
The following information has many
time-tested, important trailering tips
and safety rules. Many of these are
important for your safety and that of
your passengers. So please read
this section carefully before pulling a
trailer.
Weight of the Trailer
How heavy can a trailer safely be?
It depends on how the rig is used.
Speed, altitude, road grades,
outside temperature, and how much
the vehicle is used to pull a trailer
are all important. It can depend
on any special equipment on the
vehicle, and the amount of tongue
weight the vehicle can carry. See
Weight of the Trailer Tongue later
in this section for more information.
Driving and Operating
Trailer weight rating (TWR) is
calculated assuming the tow
vehicle has only the driver but all
required trailering equipment.
Weight of additional optional
equipment, passengers, and
cargo in the tow vehicle must be
subtracted from the trailer weight
rating.
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