Total Weight On Your Vehicle's Tires; Safety Chains - GMC 2004 Canyon Owner's Manual

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 of the items around in the trailer.

Total Weight on Your Vehicle's Tires

Be sure your vehicle's tires are inflated to the upper limit
for cold tires. You'll find these numbers on the
Certification label at the rear edge of the driver's door
above the door latch, or see Loading Your Vehicle
on page 4-52. Then be sure you don't go over the GVW
limit for your vehicle, including the weight of the trailer
tongue.
Hitches
It's important to have the correct hitch equipment.
Crosswinds, large trucks going by and rough roads are
a few reasons why you'll need the right hitch.
4-68
Weight-Distributing Hitches and
Weight Carrying Hitches
You can use your step bumper hitch for trailers up to
2,000 lbs (907 kg) total weight, and 200 lbs (90 kg)
tongue weight.
Notice: If you use a step-bumper hitch, your bumper
could be damaged in sharp turns. Make sure you
have ample room when turning to avoid contact
between the trailer and the bumper.

Safety Chains

You should always attach chains between your vehicle
and your trailer. Cross the safety chains under the
tongue of the trailer to help prevent the tongue from
contacting the road if it becomes separated from
the hitch. Instructions about safety chains may be
provided by the hitch manufacturer or by the trailer
manufacturer. For trailers up to 2,000 lbs. (907 kg) you
may attach the safety chains to the attaching points
on the bumper. For heavier trailers, follow the trailer or
hitch manufacturer's recommendation for attaching
safety chains. Always leave just enough slack so you
can turn with your rig. Never allow safety chains to drag
on the ground.