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william b
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the heater in 1991 chevy pickupis not working properly?
at idle it will let a little heat come out the lower vent but when start driving cold air only i have look for vacume hose but do not see any going in to the cab at all there is to heater hoses that connect to the heater core and beside it is what looks like anouther fitting3/4" with nothing hooked to itis this just a large vacume fitting or a drain
3 AnswersChevrolet1 decade ago