Chevrolet 1996 S10 Pickup Owner's Manual page 327

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Short Trip/City Maintenance Schedule
I
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
O F
(32
O
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.
Manual transmission fluid doesn't require change.
L7
Inspect Positive Crankcase Ventilation
(Pcv)
valve.
An Emission Control Service.
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I
DATE ACTUAL MILEAGE
7-31