Question about 1990 Chevrolet Astro Extended
Two possible ideas, one heater core plugged, feel inlet and out let hoses on the heater core, if one is cooler than other, back flush heater core. Second, is all the air out of the system? Does the temp gauge fluctuate, may need to burp air from the system, either by vacuum tool or allow to run for awhile with cap off, hope this helps.
Posted on Jan 11, 2009
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Posted on Jan 02, 2017
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