Chevrolet 2006 Colorado Owner's Manual page 351

1. Remove the center cap by placing the chisel end of
the wheel wrench (E) into one of the slots on the
wheel and gently prying the cap out.
If your vehicle has the Xtreme package, remove
each wheel nut cap with the wheel wrench
and remove the center cap by hand.
2. Use the wheel wrench to loosen all the wheel nuts
by turning it counterclockwise. Do not remove the
wheel nuts yet.
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