Buick Verano Owner's Manual page 296

Tires need the correct amount
of air pressure to operate
effectively.
The Tire and Loading
Information label on the
vehicle indicates the original
equipment tires and the correct
cold tire inflation pressures.
The recommended pressure
is the minimum air pressure
needed to support the vehicle's
maximum load carrying capacity.
For additional information
regarding how much weight
the vehicle can carry, and an
example of the Tire and Loading
Information label, see
How the vehicle is loaded
affects vehicle handling and ride
comfort. Never load the vehicle
with more weight than it was
designed to carry.
Check the tires once a month
or more. Do not forget the
compact spare tire, if the vehicle
has one. The cold compact
spare should be at 420 kPa
(60 psi). For additional
information regarding the
compact spare tire, see
Use a good quality pocket-type
gauge to check tire pressure.
Proper tire inflation cannot be
determined by looking at the tire.
Check the tire inflation pressure
when the tires are cold, meaning
.
.