GMC 2000 Savana - Manual (Page 251)

yellow blue
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4. Attach the ratchet, with the UP side facing you, to
the extension.
5. Put the flat end of the extension on an angle through
the hole in the rear door frame, above the bumper.
6. Raise the tire fully against the underside of the
vehicle. Continue turning the ratchet/wheel wrench
until the tire is secure and the cable is tight. The
spare tire hoist cannot be overtightened.