Chevrolet Silverado 1500 2023 Owner's Manual page 419

418 Service and Maintenance
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
0 340.
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 0 341.
Every 36 000 km (22,500 mi)
Replace passenger compartment air filter.
Or every 24 months, whichever comes
first. More frequent passenger
compartment air filter replacement may
be needed if driving in areas with heavy
traffic, poor air quality, high dust levels,
or environmental allergens. Passenger
compartment air filter replacement may
also be needed if there is reduced airflow,
window fogging, or odors. Your GM
dealer can help determine when to
replace the filter.
Every 96 000 km (60,000 mi)
Replace spark plugs. Inspect spark plug
wires and/or boots. (2.7L L4 Turbo
Engine Only)
Every 156 000 km (97,500 mi)
Replace spark plugs. Inspect spark plug
wires and/or boots. (5.3L and 6.2L
V8 Engines Only)
Every 161 000 km (100,000 mi)
Replace hood and/or body lift support gas
struts. Or every 10 years, whichever
comes first. See Gas Strut(s) 0 356.
Change transfer case fluid, if equipped
with 4WD. Do not directly power wash
the transfer case and/or front/rear axle
output seals. High pressure water can
overcome the seals and contaminate the
transfer case fluid. Contaminated fluid will
decrease the life of the transfer case and/
or axles and should be replaced.
Every 240 000 km (150,000 mi)
Drain and fill engine cooling system. Or
every six years, whichever comes first.
See Cooling System 0 343.
Severe Conditions Requiring More
Frequent Maintenance*
Public service, military, or commercial use
vehicles to include the following:
Ambulances, police cars, and
emergency rescue vehicles.
Civilian vehicles such as light duty
pick-up trucks, SUVs, and passenger
cars that are used in military
applications.
Recovery vehicles such as tow trucks
and flatbed single vehicle carriers or
any vehicle that is consistently used in
towing trailers or other loads.
High use commercial vehicles such as
courier delivery vehicles, private
security patrol vehicles, or any vehicles
that operate on a 24 hour basis.
Any vehicle consistently operated in a
high sand or dust environment such as
those used on oil pipelines and similar
applications.