Chevrolet Silverado 4500HD 2022 Owner's Manual page 355

Normal Maintenance
During operation, the air and oil inside the
hub/wheel cavity expands. It is normal for a
mist of oil to be present on the outside of
the hubcap around the vent slit or hole.
Over time, if not wiped off, this film may
collect dust and appear unsightly. If the
entire face and end of the hubcap become
wet with oil, investigate the cause. Refer to
the service manual for repair procedures.
Routinely clean the hubcap to ensure that
the lubricant level can be easily observed
through the clear window as intended.
In situations where the window is clean on
the outside, but discolored on the inside,
check the lubricant level by removing the
rubber fill/vent plug and insert a finger into
the hole.
The specified lubricant level for GM clear
window type hubcaps is from the minimum
line to 0.8 cm (5/16 in) above the
minimum line.
If the lubricant level suddenly drops
dramatically below the minimum level, see
the service manual for diagnostic procedure.
Alignment
Maintaining front axle alignment is very
important to achieving maximum tire life
and vehicle control. Inspecting steer axle
tires in the first 5 000 km
(3,000 mi)-16 000 km (10,000 mi) of service
will generally show if tires are wearing
normally.
Rapid outside shoulder wear on both tires
indicates too much toe-in.
Rapid inside shoulder wear on both tires
indicates too much toe-out.
Excessive wear on the inside or outside of
one steer tire, but not the other, can
indicate a toe-in or toe-out condition
coupled with a misaligned front or
rear axle.
Pulling to the right or left can indicate
misalignment of the front or rear axle,
unequal tire pressures, or a damaged/
mismatched tire.
See Tires 0 304 for additional related
information.
Service and Maintenance
Brakes
General Information
Warning
To prevent personal injury or death, avoid
breathing brake lining fiber dust. Always
use a respirator while performing brake
maintenance. Follow precautions listed
below.
Warning
To prevent property damage, personal
injury, and/or death, always check and
maintain brakes in proper condition and
adjustment. Out-of-adjustment brakes
could cause reduced braking ability.
Warning
All new GM vehicles use non-asbestos
brake linings. However, exposure to
excessive amounts of brake material dust
may be a potentially serious health
hazard. To help protect yourself and
others, follow all of the precautions in
this Section when servicing the brakes.
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