GMC 1996 Sierra Owner's Manual page 354

I
Short TripKity Maintenance Schedule
--
Gasoline Engines
1
100,000 Miles (166 000 km)
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.
0
Inspect spark plug
wires.
Replace spark plugs.
An Emission C o n t d Service.
0
Change automatic transmission fluid
and filter if the vehicle's GVWR is over
8600 Ibs. 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.
If'
. e
y o u
c/o
rzot
LLW
your vehicle under crny
o f
these corzciitiorzs, the.fluid and filter do not
require chcrnging.
Manual transmission fluid doesn't require change.
0
Inspect Positive Crankcase Ventilation
( P c v ) valve.
An Emission Control Service.
DATE SERVICED B Y ACTUAL MILEAGE
7-28