CHEVROLET 2009 Impala - Manual (Page 336)

{ CAUTION:
Wheel nuts that are improperly or incorrectly
tightened can cause the wheels to become loose or
come off. The wheel nuts should be tightened with a
torque wrench to the proper torque specification
after replacing. Follow the torque specification
supplied by the aftermarket manufacturer when
using accessory locking wheel nuts. See Capacities
and Specifications on page 5-101 for original
equipment wheel nut torque specifications.
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 5-101 for the wheel nut torque specification.
11. Tighten the wheel nuts
firmly in a crisscross
sequence as shown.
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.
5-84