Re: Chevy techs, please put your thinking cap on.
sounds like an air pocket to me. i fought an s10 one night for 2 hours trying to make that stop. i finally took one of the heater hoses off and lightly blew air through it with my compressor and problem quit. also you may check the radiator cap or buy a new one i know when these things act up they can do goofy things. i kept blowing tanks on radiator in my 88 chevy 3500 with a 7.4 over a stupid $5 radiator cap
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