Chevrolet Silverado 4500HD 2022 Owner's Manual page 359

grease, and reassemble. Be sure the
terminals are clamped tightly. See your
dealer for grease specifications.
Electrical Charging and Starting System Test
At every Preventive Maintenance (PM), fully
charge the batteries using an automatic
float charger. Then, have a qualified
technician perform an electrical system test,
available through your dealer, to catch
electrical system problems before they cause
further damage to the batteries and prevent
a stranded vehicle. The test will check for
alternator amperage output, starter current
draw, and battery amperage capacity. This
type of testing will detect weaknesses that
may not yet be apparent during normal
daily operations.
Terminal Inspection-Cleaning-Corrosion
Protection
Periodically inspect electrical connectors on
the engine, battery, and frame for corrosion
and tightness. Inspect exposed cables for
fraying or signs of abrasion. Exposed
terminals, such as cranking motor,
alternator, and feed-through studs should be
cleaned and recoated with a dielectric
grease, paste or spray protectant. The
inspection/cleaning/corrosion protection
should include feed-through connections,
power and ground cable connections for
batteries, engines, and the starter stud.
Connectors that are more subject to
corrosion may be disassembled and sprayed
internally with a light coating of dielectric
grease. Use grease sparingly, as too much
grease will not allow air to escape from the
connection, and this compressed air will
push out the seals in the electrical
connectors.
Accessory Feed Connections
Danger
Fuses and circuit breakers are marked
with their ampere rating. Do not exceed
the specified amperage rating when
replacing fuses and circuit breakers. Use
of an oversized fuse or circuit breaker can
result in a vehicle fire. You and others
could be seriously injured or killed.
Vehicle electrical systems are complex and
often include electronic components, such as
engine and transmission controls, instrument
panels, antilock brakes. While most systems
still operate on battery voltage (12 volts),
some systems can be as high as 90 volts or
Service and Maintenance
as low as 5 volts. Refer to the Electrical
Circuit Diagram Manuals, available from
your GM dealer, to ensure that any body
lights and accessories are connected to
circuits that are both appropriate and not
overloaded. No modification should be made
to any vehicle control system without first
contacting your GM dealer.
Engine
General Information
For complete operation and maintenance
information pertaining to your engine, refer
to the Engine Operation and Maintenance
Manual provided with the vehicle.
For effective emission control and low
operating cost, it is important that
maintenance operations be performed at the
specified periods or mileage intervals
indicated in the Engine Operation and
Maintenance Manual.
Service intervals are based on average
operating conditions. In certain
environments and locations, more frequent
servicing will be required.
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