GMC 1999 Suburban Owner's Manual page 267

With the UP marking on the ratchet facing you, rotate
the ratchet clockwise. That will lift the jack head a little.
If the wheel also has a trim ring, use the wheel wrench
to pry along the edge and remove it.
If the wheel has a smooth center piece, place the wheel
wrench in the slot on the wheel and gently pry it off.
yellowblue
If your vehicle has wheel
nut caps, use the wheel
wrench and ratchet to
remove them. Turn
the wheel wrench
counterclockwise, with
DOWN facing you, to
remove the wheel nut caps.
Then take off the hub cap.
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