Chevrolet GMC 2024 Manual page 14

Fill the DEF tank on level ground and with
the vehicle off. When adding DEF, it is
recommended to fully fill the DEF tank. For
DEF tank capacity see Capacities and
Specifications 0 45. When adding DEF to an
empty or very low tank, always add at least
7.5L (2 gal) of fluid to release the vehicle
from speed limitation.
Driving and Operating
If using a bottle or jug to refill DEF, follow
the instructions on the container label and
use a dedicated fill aid.
1. Turn the DEF cap counterclockwise and
remove the cap.
2. When fluid reaches the top of the DEF
fill pipe, stop filling. Do not top off the
DEF tank.
3. When replacing the DEF cap, turn it
clockwise until it clicks. Make sure the
cap is fully installed.
4. Push the fuel/DEF door closed.
Caution
Do not overfill the DEF tank and do not
allow DEF to contact the finished surfaces
of the vehicle, as it could damage the
vehicle finish. If DEF is spilled during
filling, wipe any affected surface with a
damp cloth.
DEF Low
As the DEF level drops, warnings will
automatically be displayed in the Driver
Information Center (DIC). Select Vehicle
Information in the DIC to view DEF level
status. See Driver Information Center (DIC)
0 5.
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