1993 GMC C3500 my truck dosent heat

1993 GMC C3500
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METALBAKON
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Heater problem
1993 GMC C3500 V8 Four Wheel Drive Automatic

winter is comming up and after freezing last winter i want to be warm. My truck dosent heat up at all after i turn it on. it might start getting a little warm but only after an hour of strait driving. How can i make my heater blast warm air this winter?
Sep 29, 2009 at 1:47 AM
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RASMATAZ
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Make sure the heater core is not clogged-up and replace the thermostat and see what happens-further could be an air mix/blend/mode/recirc door problems, vacuum and actuators and HVAC control module
Sep 29, 2009 at 2:23 AM