Chevrolet 2010 Corvette Owner's Manual page 123

If the vehicle has a Navigation system, see "Head-Up
Display (HUD)" in the Index of the navigation manual.
The Manual Paddle Shift system will not allow either an
up-shift or a down-shift if the vehicle speed is too fast
or too slow, nor will it allow a start from 4 (Fourth)
or higher gear.
If up-shifting does not occur when needed, vehicle
speed will be limited to protect the engine.
When the transmission gear does not respond to a shift
change, the DIC will show an X over the gear display.
When using the Manual
Paddle Shift feature while
in S (Sport Mode), the
current gear will be
displayed in the Driver
Information (DIC), or the
Head-Up Display (HUD),
if the vehicle has either
of these features.
If the vehicle has a HUD, and the transmission gear
does not respond to a shift change, a chime will sound
and the HUD will momentarily show an X over the
gear display.
Manual Paddle Shift operation is available for use with
Cruise Control. See Cruise Control on page 4-7 for
more information.
The vehicle speeds required for Manual Paddle Shift
up-shifts depend on several vehicle inputs, which
will vary the allowed up-shift speed by a few mph (km/h).
When a requested shift is
denied due to the speed
restrictions shown, the DIC
will momentarily show
an X over the gear display
and a chime will sound.
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