Chevrolet/GMC Silverado 1500 / Sierra/Sierra Denali 1500 Owner Manual
(GMNA-Localizing-MidEast-16515122) - 2023 - CRC - 8/12/22
Service and Maintenance
377
Every 240 000 km
.
Drain and fill engine cooling system. Or
every six years, whichever comes first.
See
.
.
Visually inspect accessory drive belts. Or
every 10 years, whichever comes first.
Inspect for fraying, excessive cracking,
or damage; replace, if needed.
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.
.
Vehicles that are regularly used for short
trips of 6 kilometers or less.
The oil life indicator will show you when
to change the oil and filter. Under severe
conditions the indicator may come on
before 10 000 km.
* Footnote: Under extreme driving
conditions listed above, it may be
necessary to replace your spark plugs at
more frequent intervals. For further
assistance in determining the most
suitable service maintenance intervals for
your vehicle, please contact your
authorized GM Dealer.
Extreme service is for vehicles mainly
driven off-road in four-wheel drive or used
in farming, mining, forestry, or snow
plowing.
Additional Required Services
—
Severe
Service
Every 70 000 km
.
Change automatic transmission fluid and
filter.
Every 80 000 km
.
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
fluid. Contaminated fluid will decrease the
life of the transfer case and/or drive axles
and should be replaced.
Special Application Services
.
Vehicles with Dual Wheels: Check dual
wheel nut torque at 160, 1 600, and
10 000 km (100, 1,000, and 6,000 mi) of
driving. Repeat this service whenever a
tire/wheel is serviced or removed.
.
Severe Commercial Use Vehicles Only:
Lubricate chassis components every oil
change.
.
Have underbody flushing service
performed. See
“
Underbody Maintenance
”
in
.
