Chevrolet 2015 Captiva Owner's Manual page 203

GPS is managed by the US
Department of Defense. It may
purposely reduce the accuracy of
the GPS signals so that the floating
point may swing.
Use Notice
The floating point may swing
before the GPS signal is
received when you turn the
power on.
The floating point may swing
when you use the system the
first time after installation.
The system will automatically
adjust its position and direction
using GPS signals when the
floating point mismatches real
conditions.
Infotainment System 7-83