Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada-
11354421) - 2018 - CRC - 5/9/17
Driving and Operating
39
condition prevents the filling of a
DEF tank, place the vehicle in a
warm garage overnight.
Exhaust Fluid Low
A full DEF tank will last for several
thousand kilometers (miles),
depending on vehicle usage.
As the DEF level drops, warnings
will automatically be displayed in the
DIC. DEF level status is available
on the DIC under the vehicle
Information button. See
“
Exhaust
Fluid Level
”
in
.
To avoid vehicle speed limitations,
the DEF tank should be refilled at
the first opportunity after a low
warning indication. If DEF is added
before the EXHAUST FLUID
EMPTY REFILL NOW message
appears, it may take several km/mi
for the DIC message to update.
If the vehicle speed has been
limited and DEF has been added, it
may take up to 30 seconds after
engine start with the vehicle
stopped for the EXHAUST FLUID
EMPTY REFILL NOW message to
clear. If the vehicle is driven prior to
the DIC message clearing, the
vehicle speed will still be limited.
If the DIC message clears while
driving, the speed limitation will be
removed gradually.
If DEF is added under freezing
conditions, additional time may be
required to remove speed limitations
and may require less fluid to fill the
DEF tank.
The following actions describe
strategies required by the U.S.
Environmental Protection Agency
(EPA) and the California Air
Resource Board (CARB). The DEF
messages relate to these strategies.
The EXHAUST FLUID RANGE
message first displays at
approximately 1 600 km (1,000 mi).
This message appears again at
approximately 500 km (300 mi) of
remaining range before the exhaust
fluid tank becomes empty.
Based on driving conditions the
amount needed to fill the tank
will vary.
See the following list for
approximate volume required to fill
the DEF tank when 1 600 km
(1,000 mi) warning appears:
.
Colorado/Canyon - 4-cylinder -
16.5 L (4.5 gal)
.
Silverado/Sierra/Sierra Denali -
8-cylinder - 14.5 L (3.8 gal)
.
Express/Savana - 4-cylinder -
14.5 L (3.8 gal)
Below 500 km (300 mi) of range
remaining, these messages will
appear every time the vehicle is
started.
If these warnings are ignored and
the DEF tank becomes empty, the
DIC message displays:
.
For vans and 4-cylinder pickups,
EXHAUST FLUID EMPTY
REFILL NOW - 644 KM (400 MI)
UNTIL 105 KM/H (65 MPH) MAX
SPEED.
.
For 8-cylinder pickups,
EXHAUST FLUID EMPTY
REFILL NOW - 805 KM (500 MI)
UNTIL 105 KM/H (65 MPH) MAX
SPEED.