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Service and Maintenance 10-5
First Engine Oil Change After
Every 40 000 km/25,000 Miles
.
Fuel system inspection for
damage or leaks.
.
Passenger compartment air
filter replacement (or every
12 months, whichever occurs
first). More frequent replacement
may be required if vehicle is
driven regularly under dusty
conditions.
.
CTS-V only: 6‐speed manual
transmission fluid 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.
.
CTS-V only: Clutch hydraulic
system drain, flush, and refill.
.
CTS-V only: Brake hydraulic
system drain, flush, and refill
(severe service only) for vehicles
used for high performance
operation.
First Engine Oil Change After
Every 80 000 km/50,000 Miles
.
Engine air cleaner filter
replacement. See Engine Air
Cleaner/Filter on page 9‑15.
.
Automatic transmission fluid
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 9‑13.
.
CTS-V only: 6‐speed manual
transmission fluid change
(normal service).
.
All-wheel-drive vehicles only:
Transfer case fluid 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. During any
maintenance, if a power washer
is used to clean mud and dirt
from the underbody, care should
be taken to not directly spray
the transfer case 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 should be replaced.