Driving and Operating 9-15
If these warnings are ignored and
the DEF tank becomes empty, a
DIC message 89 km/h (55 mph)
MAX SPEED UPON RESTART
will be displayed. There will also
be a warning light and chime.
The vehicle will be speed limited to
89 km/h (55 mph) at the next restart.
When adding DEF to an empty or
very low tank, always add at least
3.78 liters (one gallon) of fluid to
release the vehicle from speed
limitation. The capacity of the DEF
tank is approximately 18.9 L (5 gal).
If the vehicle continues to be driven
without filling the DEF tank, it will be
limited to 7 km/h (4 mph) after the
second fuel fill.
See Vehicle Messages on
page 5‑11, Diesel Exhaust Fluid
(DEF) Warning Light on page 5‑9
and Recommended Fluids and
Lubricants on page 11‑8 for more
information.
Exhaust Fluid Quality Poor
Use only exhaust fluid that is
GM approved, or fluid containing the
API certified or ISO 22241 label.
All DEF has an expiration date.
If the system detects poor quality,
contaminated or diluted DEF, the
DIC will display EXHAUST FLUID
QUALITY POOR. SEE OWNERS
MANUAL NOW. Adding fresh DEF
to the system may resolve the
problem, depending on several
factors. If the DIC message persists,
see your dealer.
After 322 km (200 miles) of driving
without correcting the problem, a
DIC message 89 km/h (55 mph)
MAX SPEED UPON RESTART will
be displayed. There will also be a
warning light and chime. The
vehicle will be speed limited to
89 km/h (55 mph) at the next restart.
If the problem is not resolved
after 805 km (500 miles) of
operation, speed will be limited to
7 km/h (4 mph) after the next fuel fill.
Service Exhaust Fluid System
If a problem occurs with the
DEF system, the DIC will display
SERVICE EXHAUST FLUID
SYSTEM SEE OWNERS MANUAL
NOW. In some cases this message
will clear itself, indicating that the
DEF system was able to correct the
condition. If the DIC message
persists, see your dealer.
After 322 km (200 miles) of driving
without correcting the problem, a
DIC message 89 km/h (55 mph)
MAX SPEED UPON RESTART will
be displayed. There will also be a
warning light and chime. The
vehicle will be speed limited to
89 km/h (55 mph) at the next restart.
If the problem is not resolved after
805 km (500 miles) of operation,
speed will be limited to 7 km/h
(4 mph) after the next fuel fill.
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