Oldsmobile 1999 Silhouette - Manual (Page 293)

yellow blue
5-25
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.)
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.
NOTICE:
To help avoid damage to the lock nut or the wheel
lock key, do not use an impact wrench with
this key.