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**old Rusty C10** · 10-29-2011, 09:09 AM

most of the time its something stupid like low coolant or a thermostat.. the other issue is usually the flapper door on the box.. Unless you have no heat or a leak in the passenger compartment the heater core is usually good.
CHeck to make sure when the truck is at normal operating temperature that both hearer lines on the motor are hot.. if one is hot and one is cold then there is a blockage of some kind in the heater core

10-29-2011, 09:09 AM	#7
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,345	Re: no heat in new truck most of the time its something stupid like low coolant or a thermostat.. the other issue is usually the flapper door on the box.. Unless you have no heat or a leak in the passenger compartment the heater core is usually good. CHeck to make sure when the truck is at normal operating temperature that both hearer lines on the motor are hot.. if one is hot and one is cold then there is a blockage of some kind in the heater core __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!