GMC 1996 Sierra Owner's Manual page 367

1
Long Tripmighway Maintenance Schedule
--
Gasoline Engines
I
100,000 Miles (1 66 000 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 the
cooling system and pressure cap.
An Emission Con.tro1 Service.
3-
0
Inspect spark plug wires.
0
Replace spark plugs.
An Emission Control Service.
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
(32°C) or higher.
An Emission Control Service.
-
In hilly or mountainous terrain.
-
When doing frequent trailer towing.
-
Uses such as found in taxi, police or
delivery service.
v y o u do not
I L Y ~
y o u r -
vehicle under
m y
uf
these c*orlditions, the fluid and filter do not
require chwgirzg.
Manual transmission fluid doesn't require change.
Inspect Positive Crankcase Ventilation
(Pcv)
valve.
An Enlission
Control Service.
DATE ACTUAL MILEAGE SERVICED BY: