CHEVROLET 1999 Corvette - Manual (Page 107)

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Power/Heated Remote Control Mirrors The electric mirror control is on the driver’s door. It
controls the driver’s and passenger’s mirrors. To adjust
either mirror, press the LT (left) or RT (right) button to
select the mirror, then press the arrows to adjust the
direction of the mirror. The selected mirror will stay on
for 20 seconds after the last adjustment. An indicator
light will come on above the mirror that you select.
Your preferred mirror position can be stored if you have
the memory option. See “Memory” in the Index.
For operation of the heated outside mirrors, see “Rear
Window Defogger” in the Index.