Cadillac 2006 XLR - Manual (Page 79)

Driver Shift Control (DSC)
The Driver Shift Control (DSC) feature lets you manually
control over the operation of the transmission.
To use this feature,
move the shift lever
from the AUTOMATIC
OVERDRIVE (D) position
to the left and into the
driver shift control gate.
A plus symbol will also appear on the shift console
above the AUTOMATIC OVERDRIVE (D) indicator and
minus symbol will appear below the indicator.
To request an upshift in DSC, briefly move the shift lever
up toward the plus symbol. To request a downshift, briefly
move the shift lever down toward the minus symbol.
The Head-Up Display (HUD) will display the change in
gear, though the actual upshift or downshift may be
delayed until the engine speed is correct for that gear.
The gear displays on the HUD until the next time you
upshift or downshift.
The gear selected and shown in the HUD is one of a
number of gears available. It does not mean that
the vehicle will operate only in that specific gear.
The actual gear the vehicle shifts to depends on a
combination of the driver-requested gear range,
vehicle speed and throttle position.
Notice: If you drive your vehicle at high RPMs
without upshifting while using Driver Shift
Control (DSC), you could damage your vehicle.
Always upshift when necessary while using DSC.
If you do not upshift as the engine approaches the
red line on the engine rpm gage, the engine speed is
controlled to limit the engine rpm.
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