2004 CHEVROLET CLASSIC engine oil

48,000 Miles (80 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation
on page 5-60for proper rotation pattern and
additional information.(See footnote +.)
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 uid and lter do not require changing.
51,000 Miles (85 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
54,000 Miles (90 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation
on page 5-60for proper rotation pattern and
additional information.(See footnote +.)
57,000 Miles (95 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
60,000 Miles (100 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
❑Replace engine air cleaner filter. SeeEngine
Air Cleaner/Filter on page 5-17for more information.
An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
63,000 Miles (105 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
6-9

66,000 Miles (110 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation
on page 5-60for proper rotation pattern and
additional information.(See footnote +.)
69,000 Miles (115 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
72,000 Miles (120 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation
on page 5-60for proper rotation pattern and
additional information.(See footnote +.)
75,000 Miles (125 000 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 5-17for more
information.An Emission Control Service. (See
footnote †.)
78,000 Miles (130 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation
on page 5-60for proper rotation pattern and
additional information.(See footnote +.)
81,000 Miles (135 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
84,000 Miles (140 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation
on page 5-60for proper rotation pattern and
additional information.(See footnote +.)
87,000 Miles (145 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
6-10

90,000 Miles (150 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
❑Replace engine air cleaner filter. SeeEngine
Air Cleaner/Filter on page 5-17for more information.
An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
93,000 Miles (155 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
96,000 Miles (160 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation
on page 5-60for proper rotation pattern and
additional information.(See footnote +.)
99,000 Miles (165 000 km)
❑Change engine oil and filter (or every 3 months,
whichever occurs first).An Emission Control Service.
100,000 Miles (166 000 km)
❑Inspect spark plug wires.An Emission Control
Service.
❑Replace spark plugs.An Emission Control Service.
❑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 any of these conditions,
the uid and lter do not require changing.
150,000 Miles (240 000 km)
❑Drain, flush and refill cooling system (or every
60 months since last service, whichever occurs first).
SeeEngine Coolant on page 5-19for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.An Emission Control Service.
❑Inspect engine accessory drive belt.An Emission
Control Service.
6-11

Long Trip/Highway Scheduled
Maintenance
The services shown in this schedule up to 100,000 miles
(166 000 km) should be repeated after 100,000 miles
(166 000 km) at the same intervals for the life of
this vehicle. The services shown at 150,000 miles
(240 000 km) should be repeated at the same interval
after 150,000 miles (240 000 km) for the life of this
vehicle.
SeePart B: Owner Checks and Services on page 6-16
andPart C: Periodic MaintenanceInspections on
page 6-20.
Footnotes
†The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to
the completion of the vehicle’s useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded.
+A good time to check your brakes is during tire
rotation. See Brake System Inspection on page 6-21.
7,500 Miles (12 500 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
15,000 Miles (25 000 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Inspect engine air cleaner filter. SeeEngine Air
Cleaner/Filter on page 5-17for more information.An
Emission Control Service. (See footnote †.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
22,500 Miles (37 500 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
6-12

30,000 Miles (50 000 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
❑Replace engine air cleaner filter. SeeEngine Air
Cleaner/Filter on page 5-17for 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. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
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. SeeEngine Air
Cleaner/Filter on page 5-17for more information.An
Emission Control Service. (See footnote †.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
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 uid and lter do not require changing.
6-13

52,500 Miles (87 500 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
60,000 Miles (100 000 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
❑Replace engine air cleaner filter. SeeEngine Air
Cleaner/Filter on page 5-17for more information.
An Emission Control Service.
67,500 Miles (112 500 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
75,000 Miles (125 000 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Inspect engine air cleaner filter. SeeEngine Air
Cleaner/Filter on page 5-17for more information.An
Emission Control Service. (See footnote †.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
82,500 Miles (137 500 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
6-14

90,000 Miles (150 000 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Replace engine air cleaner filter. SeeEngine Air
Cleaner/Filter on page 5-17for more information.
An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
97,500 Miles (162 500 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote +.)
100,000 Miles (166 000 km)
❑Inspect spark plug wires.An Emission Control
Service.
❑Replace spark plugs.An Emission Control Service.
❑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 uid and lter do not require changing.
150,000 Miles (240 000 km)
❑Drain, flush and refill cooling system (or every
60 months since last service, whichever occurs first).
SeeEngine Coolant on page 5-19for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.An Emission Control Service.
❑Inspect engine accessory drive belt.An Emission
Control Service.
6-15

Part B: Owner Checks and Services
Listed in this part are owner checks and services
which should be performed at the intervals specified to
help ensure the safety, dependability and emission
control performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
in Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-13for further
details.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-19for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the windshield
washer tank and add the proper fluid if necessary.
SeeWindshield Washer Fluid on page 5-32for further
details.
At Least Once a Month
Tire Ination Check
Visually inspect your tires and make sure tires are
inflated to the correct pressures. Don’t forget to check
your spare tire. SeeTires on page 5-52for further
details.
Cassette Tape Player Service
Clean cassette tape player. Cleaning should be done
every 50 hours of tape play. SeeAudio System(s)
on page 3-36for further details.
6-16