Dodge 2014 Charger-SRT - Owner Manual - Manual (Page 338)

When the shift up indicator (+) is shown on the display,
the GSI is advising the driver to engage a higher gear.
When the shift down indicator (-) is shown on the
display, the GSI is advising the driver to engage a lower
gear.
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.
GSI Shift Up (+) Indicator
GSI Shift Down (-) Indicator
336 UNDERSTANDING YOUR INSTRUMENT PANEL