Chevrolet Low Cab Forward 2023 Manual page 192

Warning (Continued)
and the proper tools and equipment for
the job. If you have any doubts, contact
your dealer.
You and others could be seriously injured.
Move the parking brake lever to the wheel
locked position and move the selector to P
(models with P-range) or N (models
without P-range) and make sure the shift
indicator displays P (models with P-range)
or N (models without P-range).
Make sure to turn off the engine and
remove the key from the engine control
switch before performing any checks.
Select a place with a solid and level surface
to perform the checking and maintenance
work. Make sure to chock the wheels.
It would be very dangerous if the vehicle
started to move.
When performing work on the electrical
system, begin by turning the engine control
switch to the "LOCK" position, wait at least
3 minutes, and then disconnect the negative
cable from the negative terminal on battery.
If the negative cable is disconnected within
3 minutes, the engine control module may
malfunction.
When working on the fuel line or fuel filter,
remove the fuel tank filler cap. The fuel
system is under pressure and the fuel will
overspill unless the pressure is relieved,
possibly leading to combustion or a fire.
Do not make engine adjustments yourself.
Be sure to consult your dealer.
Use only appropriate tools.
Oils and engine coolant have lubrication,
cooling and rust prevention functions.
If these liquids deteriorate through loss or
contamination, it will cause a decline in the
performance of the parts and such problems
as seizure or malfunctioning. Replenish or
change these liquids when performing the
checks (daily and periodic checks) as
required by the relevant regulations or in
accordance with the Maintenance Schedule
(when either the specified driving distance
or period of time, whichever comes first, has
expired).
Confirm that all systems and components
are normal after performing the work.
Vehicle Care
Do not leave the removed parts or tools in
the engine compartment. They could
damage the equipment if caught in the belts
or other moving components.
Dirty water, dirt and other impurities
seriously impair the effectiveness of the oil,
grease and fluids, and damage the parts.
Exercise all due caution to prevent waste or
other refuse from coming in contact with
parts or materials that have been removed
when changing or replenishing them.
Do not step on the engine or climb onto it.
You could cause an engine failure by, for
example, damaging the cylinder head cover
or various connectors.
Electric Welding
Careless electric welding of vehicle parts can
cause welding current to flow back through
the vehicle s ground circuit and damage
electrical and electronic parts so that they
do not function normally. Whenever electric
welding is necessary, consult your dealer.
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