Chevrolet corvette 2001 User Manual

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One to Four Shift Light 
(Manual Transmission)
When this light comes on,
you can only shift from
FIRST (1) to FOURTH (4)
instead of FIRST (1) to
SECOND (2).
You must complete the shift into FOURTH (4) to turn
off this feature. This helps you get the best possible 
fuel economy.
After shifting to FOURTH (4), you may downshift to a
lower gear if you prefer.
NOTICE:
Do not try to force the shift lever into SECOND (2)
or THIRD (3) when the 1 TO 4 SHIFT light comes
on. Do not try to re
-
engage FIRST (1) after
starting to shift into FOURTH (4). You will damage
your transmission. Shift only from FIRST (1) to
FOURTH (4) when the light comes on.
This light will come on when:
D The engine coolant temperature is higher than 
169
_F (76_C),
D you are going 15 to 19 mph (24 to 31 km/h) and
D you are at 21 percent throttle or less.