GMC 1993 Safari Owner's Manual page 230

Problems on the Road
" 1
d
PO459
If the wheel has a center cap, you do not have to remove the center cap to
loosen the wheel nuts. Place the ratchet and socket on the wheel nut with
the center cap on.
L
PO462
With DOWN facing you, use the ratchet and socket to loosen all the wheel
nuts. Don't remove them yet.
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