Chevrolet 1998 C/K Full-Size Pickup Owner's Manual page 401

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Long Trip/Highway Maintenance Schedule
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Gasoline Engines
0
Vehicles With GVWR Above 8,500 lbs. Only: Inspect shields and underhood
insulation for damage or looseness. Adjust or replace as required.
This is a Noise Emission Control Service. Applicable only to vehicles
sold in the United States.
37,500 Miles (62 500 km)
0
Change engine oil and filter (or every 12 months, whichever occurs first).
Lubricate chassis components (or every 12 months, whichever occurs first).
0
Check readfront axle fluid level and add fluid as needed. Check constant
An Emission Control Service.
(See footnote
#.)
velocity joints and axle seals for leaking. (See footnote
**.)
0
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote
+.)
45,000 Miles (75 000 km)
0
Change engine oil and filter (or every 12 months, whichever occurs first).
0
Lubricate chassis components (or every 12 months, whichever occurs first).
An Emission Control Service.
(See footnote #.)
(Continued)
DATE
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MILEAGE
ACTUAL
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SERVICEDBY
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DATE
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7-31