Cadillac XT4 Owner's Manual page 320

Footnotes Maintenance Schedule
Additional Required Services -
Normal
(1) Or every four years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed.
See Engine Air Cleaner/Filter 0 250.
(2) Or every two years, whichever
comes first. More frequent passenger
compartment air filter replacement
may be needed if driving in areas with
heavy traffic, poor air quality, high
dust levels, or environmental
allergens. Passenger compartment air
filter replacement may also be needed
if there is reduced airflow, window
misting, or odours. Your GM retailer
can help determine when to replace
the filter.
(3) Or as indicated by the Driver
Information Centre (DIC) or two years
whichever comes first. The fuel filter
may need to be replaced more often
based on biodiesel usage, driving in
climates with severe dust, off-road
driving, or towing a trailer for
extended periods.
(4) Visually check all fuel and vapour
lines and hoses for proper attachment,
connection, routing, and condition.
(5) Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water can
overcome the seals and contaminate
the transfer case fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and should
be replaced.
(6) Or every five years, whichever
comes first. See Cooling System 0 251.
(7) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage; replace,
if needed.
(8) Replace the brake fluid every
two years. See Brake Fluid 0 258.
(9) Or every 12 months, whichever
comes first. See Wiper Blade
Replacement 0 261.
(10) Or every 10 years, whichever
comes first. See Gas Strut(s) 0 262.
(11) Replace the air conditioning
desiccant every seven years.
SERVICE AND MAINTENANCE 319