Cadillac 2004 CTS Owner's Manual page 401

25,000 50,000 75,000 100,000 125,000 150,000
Service (41 500) (83 000) (125 000) (166 000) (207 500) (240 000)
Except 3.2L engine: Inspect engine
accessory drive belt. An Emission
Control Service.
3.2L engine: Inspect engine accessory
drive belt. An Emission Control Service.
3.2L engine: Replace timing belt.
An Emission Control Service.
See footnote (j).
Replace fuel filter. An Emission Control
Service.
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