Chevrolet Corvette 2003 Owner's Manual page 86

If your vehicle is a Z06, do not downshift into a gear
shown below at a speed greater than shown in the table:
FIRST (1)
SECOND (2)
THIRD (3)
FOURTH (4)
Notice: If you skip more than one gear when you
downshift, or if you race the engine when you
release the clutch pedal while downshifting, you
could damage the engine, clutch, driveshaft or the
transmission.
The six-speed transmission has a spring that centers
the gearshift lever near THIRD (3) and FOURTH (4).
This spring helps you know which gear you are in when
you are shifting. Be careful when shifting from
FIRST (1) to SECOND (2) or downshifting from
SIXTH (6) to FIFTH (5). The spring will try to pull the
gearshift lever toward FOURTH (4) and THIRD (3).
Make sure you move the lever into SECOND (2)
or FIFTH (5). If you let the gearshift lever move in the
direction of the pulling, you may end up shifting
from FIRST (1) to FOURTH (4) or from SIXTH (6) to
THIRD (3).
2-30
48 mph (77 km/h)
69 mph (111 km/h)
100 mph (161 km/h)
143 mph (230 km/h)
Parking Brake
To set the parking brake, hold the brake pedal down.
Pull the parking brake lever up. If the ignition is on, the
brake system warning light will come on.