Chevrolet 2004 Classic, Owner'S Manual, Page: 311 / 348

30,000 Miles (50 000 km)
❑
Change engine oil and filter (or every 12 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 fo.)
❑
Replace engine air cleaner filter. See Engine Air
Cleaner/Filter on page 5-17 for more information.
An Emission Control Service.
37,500 Miles (62 500 km)
❑
Change engine oil and filter (or every 12 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 fo.)
45,000 Miles (75 000 km)
❑
Change engine oil and filter (or every 12 months,
whichever occurs first). An Emission Control
Service.
❑
Inspect engine air cleaner filter. See Engine Air
Cleaner/Filter on page 5-17 for more information. An
Emission Control Service. (See footnote †.)
❑
Rotate tires. See Tire Inspection and Rotation on
page 5-60 for proper rotation pattern and additional
information. (See fo.)
50,000 Miles (83 000 km)
❑
Change automatic transaxle fluid and filter if the
vehicle is mainly driven under one or more of
these conditions:
− In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
− In hilly or mountainous terrain.
− When doing frequent trailer towing.
− Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, the fluid and filter do not require changing.
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