1998 GMC Suburban Owner's Manual - Page 268

1998 GMC Suburban Manual

Page 268 highlights

A CAUTION: Steam and scalding liquids fromhot cooling a system can blow out and burn badly. They you are under pressure, and you turn the radiator if 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. -- -- 5-18

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