Cadillac 1998 Seville Owner's Manual page 230

Weight of the Trailer
How heavy can a trailer safely be?
It should never weigh more than 3,790 lbs. (1 709 kg)
total, including the load. But even that can be too heavy.
If you tow more than 1,000 lbs. (450 kg), use trailer
brakes. Be sure to follow the instructions that come with
the trailer or from the brake manufacturer.
The maximum trailer weight for your vehicle can be
determined from the Gross Combined Vehicle Weight
(GCVW). The GCVW
=
curb weight
+
passenger's
weight
+
cargo weight
+
trailer weight. The GCVW
should never weigh more than 8,100 lbs. (3 677 kg)
total loaded vehicle and trailer.
It depends on how you plan to use your rig. For
example, speed, altitude, road grades, outside
temperature and how much your vehicle is used to pull a
trailer are
all
important. And, it can also depend
on
any
special equipment that you have on your vehicle.
You can ask your dealer for our trailering information or
advice, or you can write us at:
Cadillac Customer Assistance Center
Cadillac Motor Car Division
P.O. Box 436004
Pontiac, MI 48343-6004
In Canada, write to:
General Motors of Canada Limited
Customer Communication Centre
1908 Colonel Sam Drive
Oshawa, Ontario LlH 8P7
Weight of the Trailer Tongue
The tongue load (A) of any trailer is an important
weight to measure because it affects the total or gross
weight of your vehicle. The Gross Vehicle Weight
(GVW) includes the curb weight of the vehicle, any
cargo you may carry in
it,
and the people who will be
riding in the vehicle. And if you tow a trailer, you must
add the tongue load to the GVW because your vehicle
will be carrying that weight, too. See "Loading Your
Vehicle" in the Index for more information about your
vehicle's maximum load capacity.
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