Chevrolet 1995 Cavalier Owner's Manual page 194

longer hot. Turn the pressure cap slowly about
one-quarter turn to the left and then stop.
If you
hear a hiss, wait for that to stop. A hiss means
there is still some pressure left.
2. Then keep turning
the pressure cap
slowly, and remove
it.
3. Then fill the coolant surge tank with the proper mix,
up to the FULL COLD mark.
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