1995 GMC Yukon Owner's Manual - Page 274

If the flat tire is on the rear of the vehicle. put the jack handle extension on the jack handle. Position the jack under the vehicle. I A CAUTION: NOTICE: Getting under a vehicle when it jacked up is dangerous. If the is vehicle slipsoff the jack, you could badly injuredor killed. be Never get under a vehicle whenit is supported only by a jack. Raising your vehicle with the jack improperly positioned will damage thevehicle or may allow the vehicle to falloff the jack. Be sure to fit the jack head into the proper location before lift raising yourvehicle. Front Position Rear Position With UP on the ratchet facing you, raise the vehicle by rotating the ratchet and wheel wrench clockwise. Raise the vehicle far enough off the ground so there is enough room for the spare tire to fit. 5-36