1997 GMC Safari Owner's Manual - Page 247

6.5" (16.5 cm) _C1 k--I (30.0cm) 2.0" 4. Attach the ratchet to the extensionwith the UP side facing you. 5. Rotate the ratchet to the right. That will raise the jack lift head a little. 6. Position the jack under the vehicle. I a CAUTION: Getting under a vehicle when is jacked up is it dangerous. If the vehicleslips off the jack, you could be badly injuredor killed. Never get under a vehicle when it supported only by jack. is a