Cadillac CTS Owner's Manual page 318

Additional Maintenance Every
60 000 km
Replace brake fluid every
60 000 km or two years, whichever
occurs first.
Additional Maintenance Every
72 000 km
Automatic transmission fluid and
filter 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.
Spark plugs replace. (2.0L LTG
Turbo Engine)
Rear axle fluid (6.2L V8 LT4
Engines only).
Rear axle fluid (severe operation).
Front axle fluid (severe operation).
If equipped with AWD.
Additional Maintenance Every
80 000 km
Visually check all fuel and vapour
lines and hoses for proper
attachment, connection, routing,
and condition.
Additional Maintenance Every
150 000 km or if Necessary
Spark plugs replace. (6.2L LT4
Engine)
Additional Maintenance Every
250 000 km or Every Five Years,
Whichever Occurs First
Engine cooling system drain and
refill.
Conditions Requiring More Frequent
Maintenance (Severe Service)
Extreme temperatures.
Heavy city traffic.
Hilly or mountainous terrain.
Dusty, muddy or off-road
conditions.
Commercial use or trailer towing.
Most trips less than 6 km.
SERVICE AND MAINTENANCE 317