Oldsmobile 2000 Silhouette Owner's Manual page 309

For wheels with a wheel lock key, use the wheel lock
key between the lock nut and folding wrench. The
key is supplied in the front passenger door pocket.
5-26
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.