Chevrolet 1998 C/K Full-Size Pickup Owner's Manual page 406

Long Tripmighway Maintenance Schedule
--
Gasoline Engines
82,500 Miles (137 500 km)
0
0
Change engine oil and filter (or every I2 months, whichever occurs first).
An Emissiorz Cor7trol Service.
Lubricate chassis components (or every 12 months, whichever occurs first).
(See footnote
#.)
Check rear/fl-ont axle fluid level and add fluid as needed. Check constant
velocity joints and axle seals for leaking. (See footnote
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
90,000 Miles (150 000 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
0
For Two-Wheel-Drive vehicles only: Clean and repack the front wheel
0
Replace fuel filter. An Emissiolz Control Service. (See footnote?.)
An Emission Control Service.
(See footnote
#.)
velocity joints and axle seals for leaking. (See footnote
**.)
bearings (or at each brake relining, whichever occurs first).
DATE
I
MILEAGE
DATE
MILEAGE
7-36