1992 Other GMC Models no heat

1992 GMC
159,000 MILES • 6 CYL • 2WD • AUTOMATIC
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NASHPORT
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There is no water comming from tail pipe, no water leaks but no heat air blowing fine not over heating
runs well what could it be and where do i start to look for problem
Jan 15, 2010 at 1:39 PM
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JDL
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Welcome to the forum. Does the engine reach normal operating? Do the heater hoses get hot? The heater core may need to be flushed?
Jan 15, 2010 at 2:17 PM