Oldsmobile 1995 88 Owner's Manual page 218

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7. If you have an alloy (aluminum) wheel with 'a center
cover that conceals the wheel nuts the following
directions will help.
a) Insert the flat end of the wheel wrench in the
..
notch and pry off the center cover. Do not drop the
cover or lay it face down, as it could be scratched or
damaged.
b) When replacing the cover after the wheel is put
back on the vehicle, do not use a hammer or mallet
to install the cover.
8. Use the wheel wrench to loosen the wheel nuts, but
don't remove them. (The bracket shown is on wheels
with wire wheel covers only. It's needed to anchor
wire wheel covers to the wheel. Do not misplace it
while using your temporary spare tire.)