Black plate (13,1)
Chevrolet/GMC Duramax Diesel Supplement (GMNA Localizing-U.S./Canada-
7132827) - 2015 - CRC - 6/5/14
Driving and Operating
9-13
Diesel Exhaust Fluid
{
Warning
Diesel Exhaust Fluid (DEF) is
corrosive. Do not allow it to come
in contact with your skin, eyes,
or the finished surfaces of the
vehicle. If exposed, it may cause
skin and eye irritation. Wear skin
and eye protection when
handling. Inhalation may cause
irritation to the upper respiratory
tract. Store in a cool,
well-ventilated area. For more
safety information, see the label
of the Diesel Exhaust Fluid
container.
DEF is used with diesel engines to
reduce the amount of regulated
emissions produced. The fluid level
in the DEF tank must be maintained
for the vehicle to run correctly.
The capacity of the DEF tank is
20.1 L (5.3 gal).
Locating Diesel Exhaust Fluid
DEF can be purchased at a
Chevrolet or GMC dealer. It can
also be purchased at authorized
vehicle and truck dealerships.
Additionally, some diesel truck
fueling stations or retailers may
have DEF for purchase. For
vehicles with an active OnStar
subscription, OnStar can help to
locate a DEF retailer. See
“
Customer Assistance Offices
”
in
the owner manual for phone
numbers to assist in contacting a
GM dealer. See
Fluids and Lubricants on page 11-8
Filling the DEF Tank
{
Caution
Use only exhaust fluid that is GM
approved, or fluid containing the
API certified or ISO 22241 label.
The use of other fluids could
damage the system, requiring
costly repairs that will not be
covered by the vehicle warranty.
When adding DEF to an empty or
very low tank, always add at least
7.6 L (2 gal) of fluid to release the
vehicle from speed limitation.
Do not overfill the DEF tank. When
fluid reaches the top of the fill pipe,
stop filling. Do not top off the DEF
tank. When the EXHAUST FLUID
RANGE XXXX KM (MI) message in
the Driver Information Center (DIC)
displays at approximately 1600 km
(1,000 mi) of fluid range remaining,
about 11 L (3 gal) of DEF have
been used.
If you spill DEF on the vehicle while
filling the tank, rinse the area with
water and wipe the surface with a
damp cloth.
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