Cadillac CTS Owner's Manual page 317

316 SERVICE AND MAINTENANCE
with a clean cloth makes them last
longer, seal better, and not stick or
squeak.
Restraint system component
check.
Fuel system inspection for damage
or leaks.
Exhaust system and nearby heat
shields inspection for loose or
damaged components.
Accelerator pedal check for
damage, high effort, or binding.
Bonnet/Boot lid/Tailgate/Liftglass
Support Gas Strut Service: Visually
inspect gas strut, if equipped, for
signs of wear, cracks, or other
damage. Check the hold open
ability of the gas strut. Contact
your authorised repairer if service
is required.
Road Test. Check all systems for
correct function/performance.
To maintain air conditioning
efficiency, have an authorised
repairer check the system at least
once each year.
Automatic transmission shift lock
control function check.
Parking brake and automatic
P (Park) mechanism check.
Underbody flushing service.
Tyre sealant and compressor kit (if
equipped with tyre sealant and
compressor kit), check sealant
expiration date.
Inspect sunroof track and seal,
if equipped. See Sunroof 0 50.
Additional Maintenance Every
30 000 km or Two Years
In addition to the items listed under
Inspection Every 15 000 km or One
Year the following items should be
carried out every 30 000 km or
two years (whichever occurs first):
Passenger compartment air filter
replace (if applicable). 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.
Engine air filter replacement.
If driving in dusty conditions,
inspect the filter at each oil
change or more often as needed.
All-wheel-drive vehicles only:
Transfer case fluid change (severe
operation) for vehicles mainly
driven in heavy city traffic in hot
weather, in hilly or mountainous
terrain, when frequently towing a
trailer, or when used for taxi,
police, or delivery service. During
any maintenance, if a power
washer is used to clean mud and
dirt from the underbody, care
should be taken. 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
fluid. Contaminated fluid will
decrease the life of the transfer
case and/or drive axles and should
be replaced.