Cadillac 1999 DeVille Owner's Manual page 233

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If you're using a weight carrying hitch, the trailer
tongue (A) should weigh 10 percent of the total loaded
trailer weight (B). If you have a weight
hitch, the trailer tongue (A) should weigh 12 percent 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.
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
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Tire Loading Information label at the rear edge of the
driver's door or see "Loading Your Vehicle" in the
Index. 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.
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distributing
Crosswinds, large trucks going by and rough roads are a
few reasons why you'll need the right hitch. Here are
some rules to follow:
D
D
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The rear bumper on your vehicle is not intended for
hitches. Do not attach rental hitches or other
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bumper type hitches to it. Use only a frame
hitch that does not attach to the bumper.
If you'll be pulling a trailer that, when loaded, will
weigh more than 2,000 lbs. (900 kg), be sure to use a
properly mounted, weight
sway control of the proper size. This equipment is
very important for proper vehicle loading and good
handling when you're driving.
Will you have to make any holes in the body of your
vehicle when you install a trailer hitch? If you do,
then be sure to seal the holes later when you remove
the hitch. If you don't seal them, deadly carbon
monoxide (CO) from your exhaust can get into your
vehicle (see "Carbon Monoxide" in the Index). Dirt
and water can, too.
yellowblue
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mounted
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distributing hitch and
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