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1991 Chevrolet S10 Question: no heat



lightningstrix, 4.3L V6, Bethany, OK, January 04, 2010, 18:32

91 s-10 4wd heater core flushed still blows cold, is there a control valve somewhere?

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  • Answer #1

    January 15, 2010, 16:19

    Yes there is, it should be in line in 1 of your heater hoses. Be sure that the Thermostat works properly. You can test the t-stat by warming up the engine and making sure that BOTH the upper and lower radiator hoses get really hot

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    Visitor, December 07, 2010, 14:24

    I have 99 s 10. I looked at the heater hoses in the engine compartment but did not see control valve. Is it somewhere else on 1999 or do I not know what I am looking to find?

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