93 Chevy C15 Pick-up, 2WD - No Heat

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Old 12-17-07, 05:38 PM
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93 Chevy C15 Pick-up, 2WD - No Heat

I have changed thermostat, water pump, and bottom heater hose, but still no heat.

I would like to know how to tell if it's the heater core or the control on the dash.

I also recently read on the Internet that I may have a blown head gasket. The website recommended drilling a small 1/8" hole in the thermostat to solve overheating issues. The engine no longer overheats, but I see no circulation in the radiator, even with new water pump.

Could the engine be clogged up in some way?

Thanks for any help/ideas!
 
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Old 12-17-07, 05:40 PM
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Feel the two radiator hoses going into the firewall after the truck has been warmed up for some time.

They both should be pretty warm. If only one is warm, then you prolly have a clogged heater core. You can prolly flush it out by disconnecting each end and sticking a garden hose in it.
 
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