1997 Buick Century Owner's Manual - Page 219

Total Weight on Your Vehicle's Tires Be sureyour vehicle's tires are inflated to the upper limit for cold tires. You'll find thesenumbers on the Tire-Loading Information label(found inside the trunk be lid) or see "Loading Your Vehicle" in the Index. Then sure you don't go over the GVW limit for vehicle, your including the weight of the trailertongue. A B Hitches It's important to have correct hitchequipment. the Crosswinds, large trucksgoing by and rough roads are a few reasonswhy you'll need the right hitch. Here are some rules to follow: The bumpers on your vehicle are not intended for other hitches. Do not attach rental hitches or bumper-type hitches to them. Use only a frame-mounted hitch thatdoes not attach to the bumper. Will you have to make any holes in the body of your vehicle when you install a trailer hitch? you do, If then be sureto seal the holes laterwhen you remove the hitch. If you don't seal them, deadly carbon monoxide (CO) from your exhaust canget into your vehicle (see"Carbon Monoxide" in the Index).Dirt and water can, too. 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-distributing hitch, the trailer tongue should weigh 12 percent of (A) the total loaded trailer weight (B). After you'veloaded your trailer,weigh the trailer and then the tongue, separately, to seeif the weights are proper. If they aren't, you may be able to get them right simply by moving some itemsaround in the trailer. 4-33 - .