Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336155) - 2020 - CRC - 5/6/19
78
Vehicle Care
If No Steam Is Coming from
the Engine Compartment
A Driver Information Center (DIC)
message, along with a low coolant
condition, can indicate a serious
problem.
If there is an engine overheat
warning and the vehicle does not
have a low coolant condition, and
no steam is heard or seen, the
problem may not be too serious.
Sometimes the engine can get a
little too hot when the vehicle:
.
Climbs a long hill on a hot day.
.
Stops after high-speed driving.
.
Idles for long periods in traffic.
.
Tows a trailer. See
“
Driving on
Grades
”
under
“
Driving
Characteristics and Towing Tips
”
in the owner
’
s manual.
If the DIC message comes on with
no sign of steam, try this for a
minute or so:
1. In heavy traffic, let the engine
idle in N (Neutral) while
stopped. If it is safe to do so,
pull off the road, shift to
P (Park) or N (Neutral), and let
the engine idle.
2. Turn on the heater to full hot at
the highest fan speed and
open the window as necessary.
If the vehicle no longer has the
overheat warning, the vehicle can
be driven. Just to be safe, drive
slower for about 10 minutes. If the
warning does not come back on,
drive normally and have the cooling
system checked for proper fill and
function.
If the warning continues, pull over,
stop, and park the vehicle
right away.
If there is still no sign of steam and
the vehicle is equipped with an
engine driven cooling fan, push
down the accelerator until the
engine speed is about twice as fast
as normal idle speed for at least
five minutes while the vehicle is
parked. If the warning is still there,
turn off the engine and get everyone
out of the vehicle until it cools down.
Battery (4-Cylinder
Pickup Only)
Pickups with a 4-cylinder diesel
engine are equipped with an AGM
(Absorbing Glass Mat) 12-volt
battery. Installation of a standard
12-volt battery will result in reduced
cold cranking performance. When
using a battery charger on the AGM
battery, use the AGM setting on the
charger, if available, to limit charge
voltage to 14.8 volts. Follow the
charger manufacturer's instructions.
See
“
Battery - North America
”
in the
owner
’
s manual.