Cadillac 2008 STS, Owner'S Manual, Page: 455 / 500

Additional Required Services (cont’d)
Service and Miles (Kilometers)
25,000
(40 000)
50,000
(80 000)
75,000
(120 000)
100,000
(160 000)
125,000
(200 000)
150,000
(240 000)
For all-wheel-drive vehicles used for
trailer towing: Change transfer case fluid.
• • •
Replace spark plugs. An Emission
Control Service.
•
Engine cooling system service (or every
five years, whichever occurs first).
An Emission Control Service.
See footnote (j).
•
4.4L Supercharged Engine: Intercooler
system service (or every five years,
whichever occurs first). See footnote (l).
•
Inspect engine accessory drive belt.
An Emission Control Service.
See footnote (n).
•
If using DOT-4 brake fluid, change brake
fluid at a regular maintenance service
every two years.
See footnote (i).
6-7