Chevrolet Silverado 4500HD 2022 Manual page 359

358 Service and Maintenance
The required maintenance operations may
be performed at a service establishment.
Any replacement parts used for required
maintenance services or repairs should be
genuine OEM service parts. Use of inferior
replacement parts hinders engine and
emission control operations; it also can
reduce engine life and/or jeopardize the
warranty.
Receipts covering the performance of regular
maintenance should be retained in the event
questions arise concerning maintenance. The
receipts should be transferred to each
subsequent owner of the engine (vehicle).
For information regarding routine scheduled
maintenance such as replacement of oil,
filters, coolant, belts, belt tensioners, etc.,
and inspection and adjustment of items,
such as valve lash, etc., refer to the Engine
Operation and Maintenance Manual supplied
with the vehicle.
Engine Fluids and Contaminated Material
Engine fluids (oil, fuel, and coolant) may be
a hazard to human health and the
environment. Handle all fluids and other
contaminated materials (such as filters, rags)
in accordance with applicable regulations.
Recycle or dispose of engine fluids, filters,
and other contaminated materials according
to applicable regulations.
Fuel System
Frequently inspect the condition of the fuel
tanks and mounting hardware, fuel tank cap
and vent, fuel lines, clips, and routing. At
every Preventive Maintenance (PM), or daily
if necessary, drain water and sediment from
the fuel/water separator filter. Be sure to
use the proper fuel/water separator filter
element with the correct part number and
filter efficiency rating.
Fuel Tank Draining and Cleaning
Periodically (annually is recommended) drain
water and sediment from the fuel tank.
Drain and flush sediment from the fuel tank
at least every 12 months or more frequently
if fuel quality or type of fuel dictates.
Since Ultra-Low Sulfur Diesel (ULSD) fuel
tends to absorb more water and engines are
operating at higher temperatures, microbe
growth in the fuel tanks has become more
prevalent. Microbe growth results in more
contaminants in the fuel and reduces fuel
filter life. Since fuel tank draining does not
remove all microbes, fuel tank draining
alone will not eliminate the problem.
If microbe growth is found in the fuel:
1. Drain and clean the fuel tank(s) every
12 months or more often. Clean the
tanks with a professional fuel tank
cleaning system (available through your
dealer) or have your dealer perform the
service for you.
2. Treat the vehicle fuel tanks and bulk
tanks regularly with a biocide from a
reputable vendor.
3. Purchase fuel only from vendors that
pretreat their fuel with biocides.
4. Periodically test the fuel supplied by
your fuel vendor for the presence of
microbes.
Frame
GM Truck chassis are manufactured with
frame rails of high strength steel, and each
must be handled in a specific manner to
ensure maximum service life. Before
attempting frame repair or modification,
consult the service manual or your dealer.