GMC 1996 Suburban Owner's Manual page 369

I
Long Tripmighway Maintenance Schedule
0-
Gasoline Engines
0
Replace spark plugs.
An Emission Control Service.
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°C) or higher.
-
In hilly or mountainous
terrain.
-
When doing frequent trailer towing.
-
Uses such as found in taxi, police or
ael i very service.
/ f y o u do not use yoLu vehicle under any qf
these conditions, the fluid mdfilter do not
require clmnging.
0
Inspect Positive Crankcase Ventilation
(Pcv)
valve.
An
Emission Control Service.
DATE SERVICED BY: ACTUAL MILEAGE
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-~
~
7-41