Fuel Operated Heater (Foh); Parking Over Things; That Burn - GMC duramax diesel 2016 Supplement Manual

The length of time the heater should
remain plugged in depends on the
outside temperature. You may wish
to use the coolant heater to improve
ease of starting at temperatures
between 18 °C (0 °F) and 29 °
C ( 20 °F). Keep the coolant heater
plugged in for a minimum of four
hours. At temperatures below 29 °
C ( 20 °F), the coolant heater
should remain plugged in for at least
eight hours. Be sure to store the
cord before starting the engine. See
Fuel for Diesel Engines 0 47 for
information on what fuel to use in
cold weather.
Caution
Do not use the engine heater
continuously. This could damage
the engine heater and may cause
a fire. Always unplug the engine
heater after use.
Fuel Operated
Heater (FOH)
For vans with an FOH, it will
enhance heater performance and
will reduce the amount of time it
takes to warm the inside of the
vehicle in cold conditions below or
equal to 4 °C (39 °F). The FOH is
installed on the frame rail on the
driver side of the vehicle and uses
diesel fuel to heat the engine
coolant, which warms up the
passenger cabin air.
The FOH will turn on if all of the
following conditions exist:
Outside air temperature is below
or equal to 4 °C (39 °F).
Driving and Operating
Fuel level is greater or equal to
12.5% of the total fuel tank
volume.
The engine is running.
Coolant temperature is less than
70 °C (158 °F).

Parking over Things

That Burn

Warning
Things that can burn could touch
hot exhaust parts under the
vehicle and ignite. Do not park
over papers, leaves, dry grass,
or other things that can burn.
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