Buick Regal 2014 Owner's Manual page 264

Do not remove the cap to check the
fluid level or to top off the fluid level.
Remove the cap only when
necessary to add the proper fluid
until the level reaches the MIN line.
See
for the location of the
engine air cleaner/filter.
Inspect/replace the air cleaner/filter
at the scheduled maintenance
intervals listed in
. If you are
driving in dusty/dirty conditions,
inspect the filter at each engine oil
change.
To inspect the air cleaner/filter,
remove the filter from the vehicle
and lightly shake the filter to release
loose dust and dirt. If the filter
remains covered with dirt, a new
filter is required.
1. Screws
2. Electrical Connector
3. Air Duct Clamp
To inspect or replace the engine air
cleaner/filter:
1. Disconnect the outlet duct by
loosening the air duct clamp (3).
2. Disconnect the electrical
connector (2).
3. Remove the screws (1) on top of
the engine air cleaner/filter
housing.
4. Lift the filter cover housing away
from the air cleaner/filter
housing.
5. Pull out the filter.
6. Inspect or replace the engine air
cleaner/filter.
7. Reverse Steps 2 4 to reinstall
the filter cover housing.