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Chevrolet Silverado 4500HD/5500HD/6500HD Owner Manual (GMNA-
Localizing-U.S.-12102101) - 2019 - crc - 10/2/18
Driving and Operating
211
When the engine is cold, let it run
for a few minutes before driving.
This lets oil pressure build up. The
engine will sound louder when it
is cold.
For turbo protection, engine power
at speeds above idle may be limited
if the engine is cold. This protection
can last up to a maximum of
40 seconds at extreme cold coolant
and ambient temperatures.
Cold Weather Starting
Use the recommended engine oil
when the outside temperature drops
below freezing. See
. When the outside
temperature drops below
–
18 °C (0 °
F), use of the engine coolant heater
is recommended.
If you experience longer cranking
times, notice an unusual amount of
exhaust smoke, or are at higher
elevations (over 2 135 m or 7,000 ft),
you may use the engine coolant
heater. See
See
for information on what fuel to use in
cold weather.
If the Diesel Engine Will Not
Start
If the vehicle runs out of fuel, see
If the vehicle is not out of fuel, and
the engine will not start:
Turn the ignition key to ON/RUN.
After the wait-to-start light goes off,
turn the ignition key to START.
If the light does not go off, wait a
few seconds, then try starting the
engine again. See your dealer as
soon as possible for a starting
system check.
If the light comes on and then goes
off and you know the batteries are
charged, but the engine still will not
start, the vehicle needs service.
If the light does not come on when
the engine is cold, the vehicle
needs service.
If the batteries do not have enough
charge to start the engine, see
.
Check that the correct engine oil
has been used and changed at
appropriate intervals. If the wrong oil
is used, the engine may be harder
to start.
Be sure to use the proper fuel for
existing weather conditions. See
If the engine starts, runs a short
time, then stops, the vehicle needs
service.
{
Warning
Do not use gasoline or starting
aids, such as ether, in the air
intake. They could damage the
engine, which may not be
covered by the vehicle warranty.
They could also cause a fire,
which could cause serious
personal injury.
Engine Idle Variations
Under certain conditions the engine
idle speed can vary or be elevated.
Change in idle speed is normal and
does not indicate a problem. Normal