GMC SIERRA 1998 Manual page 400

Long Trip/Highway Maintenance Schedule
--
Gasoline Engines
I
22,500 Miles (37 500 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).
0
Check readfront axle fluid level and add fluid as needed. Check constant
(3
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
MILEAGE
An Emission Control Service.
(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).
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
For Two-Wheel-Drive vehicles only: Clean and repack the front wheel
0
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
0
Replace fuel filter.
An Emission Control Service.
(See footnote
#.)
velocity joints and axle seals for leaking. (See footnote
*'k.)
bearings (or at each brake relining, whichever occurs first).
rotation pat.tern and additional information. (See footnote
+.)
An Emission Control Service. (See footnote?.)
DATE
I
7-30