1998 GMC Sonoma Owner's Manual - Page 90

Parking Your Vehicle (Manual Transmission Models Only) Before you get out of your vehicle, turn off your engine, put your manual transmission in REVERSE (R) and firmly apply the parking brake. Parking Over Things That Burn If you are parking on a hill, or if your vehicle is pulling a trailer, see "Towing a Trailer" in the Index. . . . . v . .::.I Things that can burn could touch exhaust hot parts under your vehicle and ignite. Don't park over papers, leaves, dry grass or other things that can burn. 2-26