Chevrolet UPLANDER 2007 Owner's Manual page 415

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. If you
have a lot of options, equipment, passengers,
or cargo in your vehicle, it will reduce the tongue
weight your vehicle can carry, which will also
reduce the trailer weight your vehicle can tow. And
if you will 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 on page 404 for more information about
your vehicle's maximum load capacity.
If you are using a weight-carrying or a
weight-distributing hitch, the trailer tongue
weight (A) should be 10 percent to 15 percent of
the total loaded trailer weight (B). Do not
exceed the maximum allowable tongue weight of
350 lbs (159 kg) for your vehicle.
415