Engine Heater - Chevrolet GMC 2024 Manual

Cold Weather Starting
Use the recommended engine oil when the
outside temperature drops below freezing.
See Engine Oil 0 26. 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 heater.
See Engine Heater in the owner s manual.
See Fuel for Diesel Engines 0 15 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 Running
Out of Fuel 0 20.
If the vehicle is not out of fuel, and the
engine will not start, place your foot on the
brake and press ENGINE START/STOP.
If the wait-to-start 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 wait-to-start light comes on and
then goes off and you know the battery
is charged, but the engine still will not
start, the vehicle needs service.
If the wait-to-start light does not come on
when the engine is cold, the vehicle
needs service.
If the battery does not have enough
charge to start the engine, see Battery
in the owner s manual.
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 Fuel for Diesel
Engines 0 15.
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.
Driving and Operating
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 conditions that can raise
idle speed are low voltage, DPF
regeneration, air conditioning compressor
loads, and engine warmup. These speeds can
range from approximately 600 to 1000 rpm.

Engine Heater

For pickup engine heater operation, see
Engine Heater in the owner s manual.
The engine heater can provide easier
starting and better fuel economy during
engine warm-up in cold weather conditions
at or below 18 °C (0 °F). Vehicles with an
engine heater should be plugged in at least
four hours before starting.
Warning
Do not plug in the engine block heater
while the vehicle is parked in a garage or
under a carport. Property damage or
personal injury may result. Always park
the vehicle in a clear open area away
from buildings or structures.
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