GMC CHEVROLET Silverado 1500 2021 Owner's Manual page 409

408 Service and Maintenance
Because of the way people use vehicles,
maintenance needs vary. There may need to
be more frequent checks and services. The
Additional Required Services - Normal are for
vehicles that:
Carry passengers and cargo within
recommended limits on the Tire and
Loading Information label. See Vehicle
Load Limits 0 222.
Are driven on reasonable road surfaces
within legal driving limits.
Use the recommended fuel. See
Recommended Fuel (Except 6.2L
V8 Engine) 0 283 or
Recommended Fuel (6.2L V8 Engine)
0 283.
Refer to the information in the Maintenance
Schedule Additional Required Services -
Normal chart.
The Additional Required Services - Severe are
for vehicles that are:
Mainly driven in heavy city traffic in hot
weather
Mainly driven in hilly or mountainous
terrain
Frequently towing a trailer
Used for high speed or competitive
driving
Used for taxi, police, or delivery service
Refer to the information in the Maintenance
Schedule Additional Required Services -
Severe chart.
Warning
Performing maintenance work can be
dangerous and can cause serious injury.
Perform maintenance work only if the
required information, proper tools, and
equipment are available. If they are not,
see your dealer to have a trained
technician do the work. See Doing Your
Own Service Work 0 322.
Maintenance Schedule
Owner Checks and Services
Check the engine oil level. See Engine Oil
0 329.
Once a Month
Check the tire inflation pressures,
including the spare. See Tire Pressure
0 367.
Inspect the tires for wear. See Tire
Inspection 0 373.
Check the windshield washer fluid level.
See Washer Fluid 0 339.
Engine Oil Change
When the CHANGE ENGINE OIL SOON
message displays, have the engine
oil and filter changed within the next
1 000 km/600 mi. If driven under the best
conditions, the engine oil life system may
not indicate the need for vehicle service for
up to a year. The engine oil and filter must
be changed at least once a year and the oil
life system must be reset. Your trained
dealer technician can perform this work.
If the engine oil life system is reset
accidentally, service the vehicle within
5 000 km/3,000 mi since the last service.
Reset the oil life system when the oil is
changed. See Engine Oil Life System 0 331.
Engine Air Filter Change
When the REPLACE AT NEXT OIL CHANGE
message displays, the engine air filter
should be replaced at the next engine oil
change. When the REPLACE ENGINE AIR
FILTER SOON message displays, the engine
air filter should be replaced at the earliest
convenience. Reset the engine air filter life
system after the engine air filter is replaced.
See Engine Air Filter Life System 0 332.