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.
The transmission will also automatically down-shift as
the vehicle slows down and comes to a stop.
When the transmission gear does not respond to a shift
change, the DIC will show an X over the gear display.
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.
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. SeeCruise Control on page 3-10for
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).
Up-shifts to 4 (Fourth) gear require approximately
22 mph (35 km/h).
Up-shifts to 5 (Fifth) gear require approximately
28 mph (45 km/h).
Up-shifts to 6 (Sixth) gear require approximately
41 mph (65 km/h).
To prevent damage to the powertrain, Manual Paddle
downshifts to a lower gear cannot be done above certain
speeds. The maximum speed allowed for downshifting
of gears 1 (First) through 4 (Fourth) are:
Into 4 (Fourth) gear over 168 mph (270 km/h)
Into 3 (Third) gear over 124 mph (200 km/h)
Into 2 (Second) gear over 81 mph (130 km/h)
Into 1 (First) gear over 45 mph (72 km/h).
If the driver does not request an upshift as the engine
speed approaches fuel shut off RPM, the engine
speed will be limited to protect the engine. See
Tachometer on page 3-34for more information.
2-29
Mirrors
Automatic Dimming Rearview Mirror
The vehicle may have an automatic dimming inside
rearview mirror with a compass display and/or map
lamps, and OnStar
®. If the vehicle has OnStar, there are
three control buttons located at the bottom of the mirror.
SeeOnStar
®System on page 2-40for more information
on the services OnStar®provides.
Automatic Dimming Mirror Operation
The mirror automatically changes to reduce glare
from headlamps behind you. A time delay feature
prevents rapid changing from the day to night positions
while driving under lights and through traffic.
P(On/Off):The automatic dimming feature is activated
when the vehicle is started. Press and hold this button
for up to six seconds to turn this feature on or off.
T(Indicator Light):This light turns on when the
automatic dimming feature is active.
Map Lamps
If the mirror has map lamps, they are located at the
bottom of the mirror. To manually turn the lamps on or
off, press the button next to each lamp.
Cleaning the Mirror
Do not spray glass cleaner directly on the mirror.
Use a soft towel dampened with water.
Compass
Compass Operation
With the compass feature on, each time the vehicle
is started, the compass will take a few seconds to adjust
and display the current compass heading. For example,
NE is displayed for north-east.
2-37