Buick 1994 Roadmaster Owner's Manual page 183

Weight of the Trailer
How heavy can a trailer safely be?
It should never weigh more than 2,000 pounds (900 kg),
unless you have the optional 5,000 pounds (2,250 kg)
trailer towing package. But even that can be too heavy.
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 Buick Motor Division,
Customer Assistance Center, 902 E. Hamilton Avenue,
Flint, MI, 48550.
In Canada, write to General Motors of Canada Limited,
Customer Assistance Center, 1908 Colonel Sam Drive,.
Oshawa, Ontario L1H 8P7.
Weight of the Trailer Tongue
The tongue load (A) of any trailer is an important
weight to measure because it affects the total capacity
weight of your vehicle. The capacity weight 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 will tow a trailer, you must subtract the tongue
load from your vehicle's capacity weight 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.
If you're using a "dead-weight" hitch, the trailer tongue
(A) should weigh 10% of the total loaded trailer weight
(B). If you have a "weight-distributing" hitch, the traile
tongue (A) should weigh 12% of the total loaded trailer
weight (B).
After you've loaded your trailer, weigh the trailer and
then the tongue, separately, to see if the weights are
proper. If they aren't, you may be able to get them right
simply by moving some items around in the trailer.
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