Chevrolet SS Sedan 2015 Owner's Manual page 263

9-26 Driving and Operating
To enable A/S mode:
1. Move the shift lever to D (Drive).
2. Push the lever to the right.
3. Shift to the required gear:
To shift up a gear, briefly push
the lever forward toward the
+ (Plus) and release it.
To shift down a gear, briefly pull
the lever rearward toward the
(Minus) and release it.
After changing the gear and
releasing the shift lever, it returns to
the center position on the right side
of the selector.
On the bottom of the display, M and
the currently selected gear appear
as long as A/S mode is selected.
Alternatively, the paddles can be
used to shift to the required gear:
To shift up a gear, briefly pull the
+ (Plus) paddle toward the steering
wheel and release it.
To shift down a gear, briefly pull the
(Minus) paddle toward the steering
wheel and release it.
The transmission will shift to a
selected gear only if the engine
speed is within a suitable range.
If not suitable, SHIFT DENIED
will be displayed in the DIC, and
the transmission will not shift
gears. Continuing to hold the
lever in the (Minus) position
will select the requested gear as
soon as the vehicle speed
decreases to the allowed speed
for that gear.
If the engine speed becomes too
low for the currently selected
gear, the transmission will
automatically shift down, even
though A/S mode is still
selected.
While in A/S mode, 2 (Second)
or 3 (Third) gear starts can be
selected from a standing start.
This is useful for gentle
acceleration on slippery
surfaces.