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Not all manual downshift requests will be allowed by
the transmission. To prevent excessive engine RPMs,
each gear has a maximum vehicle speed associated
with it. Any downshift request above this speed is
not allowed by the transmission.
If shifting is prevented for any reason, the current
gear flashes multiple times in the Driver Information
Center (DIC), indicating that the transmission has
not shifted gears.
Some automatic downshifts can occur to maintain
minimum engine speed. This only happens if the vehicle
is left in too high of a gear for the vehicle’s speed.
For example, if you have been driving in sixth gear range
and come to a stop without manually downshifting, the
transmission automatically downshifts to first gear and
displays first gear on the HUD. As you begin to drive and
accelerate, the transmission remains in first gear until the
driver selects an upshift.
DSC can be used while using cruise control, but
transmission shifting is different while the cruise control
is on. This is not a malfunction and is necessary to
let proper operation of the cruise control.
To return to fully automatic operation, move the shift
lever to the right and back into D (Drive).
When accelerating the vehicle from a stop in snowy and
icy conditions, you may want to shift into second gear.
A higher gear allows you to gain more traction on slippery
surfaces.
In higher gears, on the XLR only, an automatic downshift
occurs if you press the accelerator pedal to the floor.
This feature provides adequate acceleration capabilities
if you forget to downshift manually. Tap the shifter
forward and the vehicle upshifts.
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