Question about 1991 Chevrolet C1500

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Had my truck in shop for 2 days, came out and had no heat. the temp gauge is running normalish, goes up then down then levels out.hoses going to heater core, the one feeding in is hot, the other is cold.there is some heat but verry little. coolant level is good.

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Well may be your heater core plugged.I could not find a part for a mixing valve.The older models had them in the feed line and were vacume or cable controled,some later models had them inside but would think that were the hoses connect go directly to the heater core.You may want to install some flushing T's and clamp off both hoses at the block and try reverse flushing the core and see what if anything comes out.

Posted on Feb 05, 2010

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Heater core is pluged have it flushed and it will work good after that.

Posted on Feb 05, 2010

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