Oldsmobile Silhouette Owner's Manual page 293

For wheels with a wheel lock key, use the wheel lock
key between the lock nut and wrench. The key is
supplied in the front passenger door pocket.
2. Loosen the wheel
--
nuts but do not
--
remove them using
the folding wrench.
(Turn the handle about
180 degrees, then flip
the handle back to the
starting position. This
avoids taking the wrench
off the lug nut for
each turn.)
NOTICE:
To help avoid damage to the lock nut or the wheel
lock key, do not use an impact wrench with
this key.
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