1998 Buick Skylark Owner's Manual - Page 209

Changing a lat 1 re ~ If a tire goes flat, avoid furthertire and wheel damage by driving slowly toa level place.Turn on your hazard warning flashers. C nging a tire can cause an injury. The vehicle 1 can slipoff the jack and overyou or other roll people. You and they could be badly injured. Find a level place to change your tire. help To prevent thevehicle from moving: 1. Set the parking brake firmly. 2 Put the shift . lever in PARK (P). 3. Turn off the engine. To be even more certain the vehicle won't move, you can putblocks at the front and rear the of tire farthestaway from the one being changed. That would be the tire on the other of the side vehicle, at the opposite end.