Oldsmobile 1999 Silhouette - Manual (Page 292)

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Removing the Flat Tire and Installing the
Spare Tire
1. If your vehicle has
aluminum wheels, use
the handle of the folding
wrench to pry the large
center cap off.
Then, with the other end of the folding wrench,
loosen the nuts. If your vehicle has the plastic “bolt - on” wheel
covers, loosen them completely using the folding
wrench, and remove the wheel cover.