GMC 1998 Safari Owner's Manual page 365

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Long TripMighway M:intenance Schedule
I
- When doing frequent trailer towing.
- Uses such as found in taxi, police or delivery service.
I f
you
do not use your vehicle under any o f these conditions, change the fluid
andfilter every 50,000 miles (83 000 km).
rotation pattern and additional information. (See footnote
+.)
0
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
22,500 Miles (37
500
km)
0
Change engine oil and filter (or every 12 months, whichever occurs first).
An Emission Control Service.
0
Lubricate chassis components (or every 12 months, whichever occurs first).
0
Check readfront axle fluid level and add fluid as needed. Check constant
0
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
(See footnote #.)
velocity joints and axle seals for leaking. (See footnote
**.)
rotation pattern and additional information. (See footnote
+.)
30,000 Miles (50 000 km)
0
Change engine oil and filter (or every 12 months, whichever occurs first).
An Emission Control Service.
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DATE
I
I
MILEAGE
ACTUAL
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SERVICEDBY:
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(Continued) I
I
I
I
DATE
I
MILEAGE
7-31