Chevrolet 1998 Express Van Owner's Manual page 327

-
Short Trip/City Maintenance Schedule
--
Gasoline Engines
48.000 Miles (80 000 km)
,
\
,
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
Lubricate chassis components (or every 3 months, whichever occurs first).
(See footnote #.)
Check axle fluid level and add fluid as needed. (See footnote
**.)
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote
+.)
DATE
I
50,000 Miles (83 000
km)
17
Change automatic transmission fluid and filter if the vehicle's GVWR is
over 8600 lbs. or 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
- In hilly or mountainous terrain.
-
When doing frequent trailer towing.
-
Uses such as found in taxi, police or delivery service.
I f
you do not use your vehicle under any of these conditions, change the fluid
and filter at IO0,OOO miles ( I 66 000 km).
(32°C) or higher.
7-16