1999 Pontiac Montana Owner's Manual - Page 288
1999 Pontiac Montana Manual
Page 288 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 the radiator pressure cap to cool if you ever have to turn the pressure cap. 5-16
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yellow
blue
5-16
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 the
radiator pressure cap to cool if you ever have to
turn the pressure cap.