1997 Pontiac Grand Prix Owner's Manual - Page 228

Total Weight on Your Vehicle's Tires Be sureyour vehicle's tires are inflated tothe upper limit for cold tires. You'll find thesenumbers on the Tire-Loading Information label, found on the inside of the trunk lid, or see "Loading Your Vehicle" in the Index. Then be sureyou don't go over the 'GVWlimit for your vehicle, including theweight of the trailer tongue, B Hitches .,, . It's important tohave the correct hitch equipment. 'Crosswinds,large trucks going by and rough roads are a few reasons why you'll need the righthitch. Here are some rules to follow: If you're using a weight-carrying hitch, the trailer tongue (A) should weigh 10 percent of the total loaded trailer weight (€3).If you have a weight-distributing hitch, the trailer tongue (A) should weigh 12 percent of the total loaded trailer weight (E). 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. Your vehicle may have nonmetallic, composite bumpers. The bumpers on your vehicle are not intended for bitches. DO not attach rental hitches or other bumper-type hitches to them. Useonly a frame-mounted hitch that does not attach to the bumper. 4-34