Cadillac 2010 STS Owner's Manual page 494

First Engine Oil Change After Every
64 000 km/40,000 Miles
3.6L (Code V) V6 Engine Only: Engine air cleaner
filter replacement. See Engine Air Cleaner/Filter on
page 6 23.
First Engine Oil Change After Every
80 000 km/50,000 Miles
4.6L (Code A) V8 Engine Only: Engine air cleaner
filter replacement. See Engine Air Cleaner/Filter on
page 6 23.
Automatic transmission fluid and filter change
(severe service) for vehicles mainly driven in heavy
city traffic in hot weather, in hilly or mountainous
terrain, when frequently towing a trailer, or used for
taxi, police, or delivery service. See Automatic
Transmission Fluid on page 6 25.
All wheel drive only: Transfer case fluid change
(severe service) for vehicles mainly driven when
frequently towing a trailer, or used for taxi, police,
or delivery service. Check vent hose at transfer
case for kinks and proper installation. Check to be
sure vent hose is unobstructed, clear, and free of
debris.
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First Engine Oil Change After Every
160 000 km/100,000 Miles
Automatic transmission fluid and filter change
(normal service). See Automatic Transmission
Fluid on page 6 25.
All wheel drive only: Transfer case fluid change
(normal service). Check vent hose at transfer case
for kinks and proper installation. Check to be sure
vent hose is unobstructed, clear, and free of
debris.
Spark plug replacement. An Emission Control
Service.
First Engine Oil Change After Every
240 000 km/150,000 Miles
Engine cooling system drain, flush, and refill,
cooling system and cap pressure check, and
cleaning of outside of radiator and air conditioning
condenser (or every 5 years, whichever occurs
first). See Engine Coolant on page 6 27. An
Emission Control Service.
Engine accessory drive belt inspection for fraying,
excessive cracks, or obvious damage and
replacement, if needed. An Emission Control
Service.