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Chevrolet Silverado 4500HD/5500HD/6500HD Owner Manual (GMNA-
Localizing-U.S.-12102101) - 2019 - crc - 10/2/18
386
Service and Maintenance
Front Axle
Inspection and Lubrication (4x2
Models)
Check to make sure that the front
axle mounting U-bolts, attaching or
mounting bolts, and nuts are
securely tightened. Loose or
misaligned front axles will affect
vehicle alignment, front tire wear,
and handling.
Re-torque the U-bolt nuts after the
first 1 600 km (1,000 mi) and every
58 000 km (36,000 mi) thereafter.
Observe the following when
checking the front axle for
damaged, binding, or worn parts,
and adequate lubrication:
.
Kingpin wear inspection requires
that no weight is on the tires.
.
Kingpin and kingpin bushing
lubrication requires that the
vehicle weight is off the tires and
the front wheels are turned fully
to the left or right prior to
installing grease distribution.
.
Kingpin thrust bushing
lubrication requires that the
vehicle weight is resting on the
tires.
.
Power grease guns may be
used; however, a hand-pumped
grease gun is recommended for
optimal grease distribution within
each component joint.
.
Inspect, lubricate, and adjust the
wheel bearings at regular
intervals.
See
or
Additional Maintenance and
Care (Maintenance Instructions)
and
Inspection and Lubrication (4x4
Models)
Proper lubrication and inspections
of the front drive components must
be followed. Both the front drive
axle and the transfer case oil level
must be checked periodically, and
also inspected for possible oil loss.
The proper lubrication level is to the
bottom of the oil fill hole with the
vehicle on level ground.
Observe the front axle for damaged,
binding, or worn parts, and
adequate lubrication.
Make sure the axle mounting U-bolt
nuts, attaching or mounting bolts
and nuts, are securely tightened.
Loose or misaligned rear axles will
affect vehicle alignment, front tire
wear, and handling.
Re-torque the U-bolt nuts as
needed. See
.
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.