Chevrolet 2004 Classic Owner's Manual page 306

24,000 Miles (40 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
Rotate tires. See Tire Inspection and Rotation
on page 5-60 for proper rotation pattern and
additional information. (See footnote +.)
27,000 Miles (45 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
30,000 Miles (50 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
Replace engine air cleaner filter. See Engine
Air Cleaner/Filter on page 5-17 for more information.
An Emission Control Service.
Rotate tires. See Tire Inspection and Rotation on
page 5-60 for proper rotation pattern and additional
information. (See footnote +.)
33,000 Miles (55 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
6-8
36,000 Miles (60 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
Rotate tires. See Tire Inspection and Rotation
on page 5-60 for proper rotation pattern and
additional information. (See footnote +.)
39,000 Miles (65 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
42,000 Miles (70 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
Rotate tires. See Tire Inspection and Rotation
on page 5-60 for proper rotation pattern and
additional information. (See footnote +.)
45,000 Miles (75 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
Inspect engine air cleaner filter. If necessary, replace
the filter. If vehicle is driven in dusty/dirty conditions,
inspect filter at every engine oil change. See
Engine Air Cleaner/Filter on page 5-17 for more
information. An Emission Control Service. (See
footnote †.)