Engine Heater; Engine Alarm And Automatic; Shutdown - Chevrolet 4500 HD 2023 Manual

142 Driving and Operating
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. Locate the heater receptacle behind the
left front tire under the fuse box.
2. Lift the heater receptacle cover (1).
3. Using a heavy duty, three-prong
extension cord (2), connect the heater
receptacle to 110 volt outlet (normal
household current). It may require
several hours to heat the engine
sufficiently. 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
disconnect the extension cord (2) and
lower the heater receptacle cover (1).
Caution
Only 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 and cause
a fire.
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.

Engine Alarm and Automatic

Shutdown