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Chevrolet 1996 Blazer Owner's Manual page 343

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Short Trip/City Maintenance Schedule
100,000 Miles (166 000 km)
0
Drain, flush and refill cooling system
(or every 60 months since last service,
whichever occurs first). See "Engine
Coolant" in the Index for what to use.
Inspect hoses. Clean radiator, condenser,
pressure cap and neck. Pressure test
cooling system and pressure cap.
An Emission Control Service.
3-
0
Inspect spark plug wires.
0
Replace spark plugs.
0
Change automatic transmission fluid and
filter if the vehicle is mainly driven under
one or more of these conditions:
An Emission Control Service.
An
Emission
Control
Service.
-
In heavy city traffic where the outside
temperature regularly reaches 90
O 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.
Ifyou do not use your vehicle under any of
these conditions, the fluid andjilter do not
require changing.
Manual transmission fluid doesn't require change.
0
Inspect Positive Crankcase Ventilation
( P c v ) valve.
An Emission Control Service.
7-31

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