Buick 2005 Century Owner's Manual page 284

1. Using the wheel wrench, loosen all the wheel nuts,
but do not remove them yet.
2. Turn the jack handle clockwise to raise the
jack lift head.
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3. For jacking at the vehicle's front location, put the
jack lift head (C) about 6 inches (15 cm) from the
rear edge of the front wheel opening (B) or just
behind the two bolts (A) as shown.