GMC 1997 Safari Owner's Manual page 363

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In hilly or mountainous terrain.
-
When doing frequent trailer towing.
-
Uses such as found in taxi, police or
delivery service.
If you do not use your vehicle under any o f these
conditions, change the fluid and filter every
30,000 miles (50 000 km).
0
Rotate tires. See "Tire Inspection and
Rotation" in the Index for proper rotation
pattern and additional information.
(See footnote +.)
DATE
SERVICED B E
ACTUAL MILEAGE
82,500 Miles (137 500 km)
Cl
Change engine oil and filter (or every
12 months, whichever occurs first).
0
Lubricate chassis components (or every
1 2 months, whichever occurs first).
(See footnote
#.)
0
Check readfront axle fluid level and add fluid
as needed. Check constant velocity joints and
axle seals for leakmg. (See footnote
**
.)
0
Rotate tires. See "Tire Inspection and
Rotation" in the Index for proper rotation
pattern and additional information.
(See footnote
+.)
An Emission Control Service.
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