1999 Chevrolet Astro Owner's Manual - Page 226
1999 Chevrolet Astro Manual
Page 226 highlights
yellowblue CAUTION: Steam and scalding liquids from a hot cooling system can blow out and burn you badly. They are under pressure, and if you turn the radiator pressure cap -- even a little -- they can come out at high speed. Never turn the cap when the cooling system, including the radiator pressure cap, is hot. Wait for the cooling system and radiator pressure cap to cool if you ever have to turn the pressure cap. 5-14
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yellow
blue
5-14
CAUTION:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They are
under pressure, and if you turn the radiator
pressure cap
--
even a little
--
they can come out at
high speed. Never turn the cap when the cooling
system, including the radiator pressure cap, is hot.
Wait for the cooling system and radiator pressure
cap to cool if you ever have to turn the pressure cap.