1999 Oldsmobile Silhouette Owner's Manual - Page 293

yellowblue 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. 5-25