Chevrolet 2003 Astro Owner's Manual page 340

37,500 Miles (62 500 km)
C I Change engine oil and filter (or every 12 months,
whichever occurs first). An Emission Control
Service.
Ll Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
whichever occurs first). (See footnote #).
needed. Check constant velocity joints and axle seals
for leaking.
page 5-64 for proper rotation pattern and additional
information. (See footnote
+).
D Rotate tires. See Tire Inspection and Rotation on
45,000 Miles (75 000 km)
0 Change engine oil and filter (or every 12 months,
0
Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
whichever occurs first). An Emission Control Service.
whichever occurs first). (See footnote #).
needed. Check constant velocity joints and axle seals
for leaking.
0 Change automatic transmission 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, change the fluid and filter every
50,000 miles (83 000 km).
0 Rotate tires. See Tire Inspection and Rotation on
page 5-64 for proper rotation pattern and additional
information. (See footnote +).
50,000 Miles
(83
000 km)
0 If you haven't used your vehicle under severe
conditions listed previously and, therefore, haven't
changed your automatic transmission fluid, change
both the fluid and filter.
U Change transfer case fluid.
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