Chevrolet Low Cab Forward 6.7L Diesel Engine 6500XD (GMNA-Localizing-
U.S.-15749874) - 2022 - CRC - 12/1/21
Driving and Operating
135
The exhaust pipe becomes extremely hot
while the engine is idling. Before warming
up the engine, make sure there is no
flammable material, such as grass, waste
paper, oil, or old tires on or near the DPF or
exhaust system.
Engine Warm-up System
During cold ambient conditions, the
automatic engine warm-up system operates
to reduce engine warm-up time during
idling.
Automatic Engine Warm-up :
This feature
will increase the idle speed of the engine in
cold ambient conditions so the engine is
warmed more quickly. When the idle speed
is increased, the engine noise may change.
This is normal. Warm-up is cancelled when
the accelerator pedal is depressed, and
resumed when the pedal is released.
Winter Cover
.
Do not cover the front of the radiator
with newspapers, cardboard or any other
flammable material to raise the engine
coolant temperature.
.
If you allow the engine to warm up but
the engine coolant temperature does not
rise, have the nearest dealer inspect the
thermostat.
Radiator Grille Covers
{
Warning
Radiator shutters, winter fronts, or grille
covers are not to be used and may cause
the engine's radiator cooling fan to
fatigue from the alternate unloading and
loading of the blades as they pass by the
masked area followed by the unmasked
area. After the fan has been fatigued, it
may suddenly break apart while rotating,
possibly causing personal injury to
anyone standing nearby, and equipment
damage. You and others could be
seriously injured.
Engine Heater
Engine Block and Oil Pan Heater
If the vehicle is parked in a garage, the
block and pan heaters should not be needed
until the garage temperature drops below
−
23°C (
−
10°F) regardless of outside
temperature.
The engine block and oil pan heaters are
designed to warm the block and oil pan
areas that will let the engine run faster. To
use the heaters:
1. On single cab vehicles, tilt the cab. See
.
2. Unwrap the electrical cord and remove
the protective cap.
3. Plug the cord into any three-prong
110 volt outlet (normal household
current). It may require several hours to
sufficiently heat the engine. Outside
temperature, oil viscosity, etc., will affect
how long the block and oil pan heater
should remain plugged in. Contact your
dealer for the conditions in your area.
4. After using the heater(s), be sure to
restore the cord properly, to help keep it
away from moving engine parts.
If the cord is too short, use a heavy duty,
three-prong extension cord. Do not use an
extension cord such as you would use for a
lamp, because the cord may overheat.
The engine should go through a warm-up
period to warm up the engine oil before
placing engine under load. This will ensure
proper lubrication of the engine.
