Buick 2009 Enclave Owner's Manual page 353

CAUTION:
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Incorrect or improperly tightened wheel nuts can
cause the wheel to come loose and even come off.
This could lead to a crash. If you have to replace
them, be sure to get new original equipment wheel
nuts. Stop somewhere as soon as you can and
have the nuts tightened with a torque wrench to the
proper torque specification. See Capacities and
Specifications on page 5-106 for wheel nut torque
specification.
Notice: Improperly tightened wheel nuts can
lead to brake pulsation and rotor damage. To avoid
expensive brake repairs, evenly tighten the wheel
nuts in the proper sequence and to the proper torque
specification. See Capacities and Specifications on
page 5-106 for the wheel nut torque specification.
Notice: Wheel covers will not fit on your vehicle's
compact spare. If you try to put a wheel cover
on the compact spare, the cover or the spare
could be damaged.
11. Tighten the wheel nuts
firmly in a crisscross
sequence as shown.
5-83