95 Blazer heater problem

[94Blazer4.3]

Well the problem is this first of all the temp doesn't climb above 120 on my temp gauge which I believe is a thermostat problem then it doesn't blow much air at all and its not very warm. Could this be a heater core problem??? I am not sure. But it blows about half as much as it should and its not very warm. Thanks for your help.

[tom3]

Try a new thermostat first, flush out the cooling system with new antifreeze and see what happens. The Blazers don't seem to blow a lot of air in any one place, but they heat well.

[mjohn]

could be a heater core...problem...
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