GMC Sierra 3500HD 2001 Owner's Manual page 261

Short Trip/City Scheduled Maintenance
12,000 Miles (20 000 km)
j
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
j
Lubricate chassis components (or every 3 months, whichever occurs first).
(See footnote #.)
j
Check rear axle fluid level and add fluid as needed.
j
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
15,000 Miles (25 000 km)
j
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
j
Lubricate chassis components (or every 3 months, whichever occurs first).
(See footnote #.)
j
Check rear axle fluid level and add fluid as needed.
j
Clean and repack the front wheel bearings (or at each brake relining,
whichever occurs first).
j
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.
DATE
ACTUAL
MILEAGE
DATE
ACTUAL
MILEAGE
(Continued)
SERVICED BY:
SERVICED BY:
7-11