GMC 1997 Safari Owner's Manual page 353

Short Trip/City Maintenance Schedule
100,000 Miles (166 000 km)
0
Inspect spark plug wires.
0
Replace spark plugs.
0
Inspect Positive Crankcase Ventilation
An Emission Control Service.
An Emission Control Service.
(Pcv)
valve.
An Emission Control Service.
DATE
SERVICED BY:
ACTUAL MILEAGE
I
I
1
150,000 Miles (240 000 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.
DATE
SERVICED BY:
ACTUAL MILEAGE
7-29