Dodge 2014 Charger Owner's Manual page 340

338 UNDERSTANDING YOUR INSTRUMENT PANEL
When the shift up indicator (+) is shown on the display,
the GSI is advising the driver to engage a higher gear.
GSI Shift Up (+) Indicator
When the shift down indicator (-) is shown on the
display, the GSI is advising the driver to engage a lower
gear.
GSI Shift Down (-) Indicator
The GSI indicator in the EVIC remains illuminated until
the driver changes gear, or the driving conditions return
to a situation where changing gear is not required to
improve fuel consumption.