1997 GMC Sonoma Owner's Manual - Page 221

Changing a Flat Tire If a tire goes flat, avoid further tire and wheel damage by driving slowly to a level place. Turn on your hazard warning flashers. CAUTION: (Continued) A CAUTION: - Changing a tire cancause an injury. The vehicle roll can slip off the jack and over you or other people. You and they couldbe badly injured. Find a level place to change your tire. To help prevent the vehicle from moving: 1. Set the parking brake firmly. 2 Put an automatic transmission shift . lever in PARK (P) or shift a manual transmission to FIRST (1) or REVERSE (R). CAUTION: (Continued) 3. If you have a four-wheel-drive vehicle with a manual transfer case shift lever, be sure the transfer case is in drive a gear not in NEUTRAL(N). 4. l h r n off the engine. 5. Put the wheel blocksat the front and rear of the tire farthestaway from the one being changed. That would bethe tire on the other side of the vehicle, at the opposite end. -- 5-23