Chevrolet 2015 Captiva Owner's Manual page 143

The various volume settings should
be selected so that acoustic signals
from outside the vehicle are audible
at all time.
Check the volume prior to turning
the device on. If the volume is
turned up when turning the switch
on, a loud sound will emit which
may damage your hearing.
Infotainment System
Do not keep the system running
with the engine stopped. Doing so
can drain the vehicle's battery.
When you use the system, always
keep the engine running.
7-23