GMC Sierra Limited 1500 2019 Owner's Manual page 435

434 Service and Maintenance
Maintenance
Schedule
Owner Checks and Services
At Each Fuel Stop
Check the engine oil level. See
Engine Oil 0 336.
Once a Month
Check the tire inflation
pressures, including the spare.
See Tire Pressure 0 382.
Inspect the tires for wear. See
Tire Inspection 0 389.
Check the windshield washer
fluid level. See Washer Fluid
0 351.
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 0 338.
Passenger Compartment Air
Filter
The passenger compartment air
filter removes dust, pollen, and
other airborne irritants from outside
air that is pulled into the vehicle.
The filter should be replaced as part
of routine scheduled maintenance.
Inspect the passenger compartment
air filter every 36 000 km/
22,500 miles or two years,
whichever comes first. Replace if
necessary. More frequent
replacement may be needed if the
vehicle is driven in areas with heavy
traffic, areas with poor air quality,
or areas with high dust levels.
Replacement may also be needed if
there is a reduction in air flow,
excessive window fogging, or odors.
Power Take Off (PTO) and
Extended Idle Use
When the vehicle is used with
the PTO equipment or used in a
way that requires extended idle
time, one hour of use shall be
deemed the same as 33 miles.
See Driver Information Center (DIC)
(Uplevel and Denali Cluster) 0 158
or Driver Information Center (DIC)
(Base Level Cluster) 0 157 for
hourmeter.
Air Conditioning Desiccant
(Replace Every Seven Years)
The air conditioning system requires
maintenance every seven years.
This service requires replacement of
the desiccant to help the longevity
and efficient operation of the air
conditioning system. This service
can be complex. See your dealer.