1999 GMC Safari Owner's Manual - Page 233
1999 GMC Safari Manual
Page 233 highlights
yellowblue The ratchet has an UP side. It also has a DOWN side. Your spare tire is stored underneath the rear of your vehicle. You will use the ratchet and extension to lower the spare tire. 6. Attach the ratchet, with the DOWN side facing you, to the extension. The extension has a socket end and a flat chisel end. 5-21