1994 GMC Suburban Owner's Manual - Page 239

A CAUTION: Never use oil or grease on studs or nuts. If you do, the nuts might come loose. Your wheel could fall causing a serious off, accident. Replace the wheel nuts with the rounded end of the nuts toward the wheel. Tighten each wheel nut by hand until the wheel is held against the hub. Front Position Rear Position Lower the vehicle by rotating the ratchet to the left. Lower the jack completely. 5-35