Cadillac XT4 2023 Owner's Manual page 326

FILTER SOON message displays,
60 000 km, or 2 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 0 263.
Every 30,000 km (19,000 mi)
Replace the passenger compartment air
filter. Or every 12 months, 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.
Every 60,000 km (37,000 mi)
Replace spark plugs. Inspect spark plug
wires and/or boots.
Every 161,000 km (100,000 mi)
Replace bonnet and/or body lift support
gas struts. Or every 10 years, whichever
comes first. See Gas Strut(s) 0 274.
Every 240 000 km (150,000 mi)
Drain and fill the engine cooling system.
Or every six years, whichever comes first.
See Cooling System 0 264.
Change rear axle fluid, if equipped with
AWD. 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.
Severe Conditions Requiring More
Frequent Maintenance*
Public service, military, or commercial use
vehicles to include the following:
Ambulances, police cars, and
emergency rescue vehicles.
Civilian vehicles such as light duty
pick-up trucks, SUVs, and passenger
cars that are used in military
applications.
Recovery vehicles such as tow trucks
and flatbed single vehicle carriers or
any vehicle that is consistently used in
towing trailers or other loads.
Service and Maintenance
High use commercial vehicles such as
courier delivery vehicles, private
security patrol vehicles, or any vehicles
that operate on a 24 hour basis.
Any vehicle consistently operated in a
high sand or dust environment, such as
those used on oil pipelines and similar
applications.
Vehicles that are regularly used for short
trips of 6 km or less.
* Footnote: Under extreme driving
conditions listed above, it may be
necessary to replace your spark plugs at
more frequent intervals. For further
assistance in determining the most
suitable service maintenance intervals for
your vehicle, please contact your
authorised GM Dealer.
Additional Required Services
Service
Every 60,000 km (37,000 mi)
Change the automatic gearbox fluid.
Every 120 000 km (75,000 mi)
Change rear axle fluid, if equipped with
AWD. Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water can
325
Severe