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1996 GMC Suburban 1500 Question: heater not heating



, 5.7L V8, Irving, TX, March 29, 2010, 20:24

Replaced thermostat and heater only gets luke warm.

2 Answers
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  • Answer #1

    March 29, 2010, 21:01

    Maybe the thermostat is staying open too much. Is the engine warming up fully-if not then recheck the termo. and make sure it opens at the right temp. Also, you may have another coolant system issue that is related to this.

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  • Answer #2

    Visitor, September 09, 2010, 16:50

    I had a very similar problem. The heat was barely warm and the higher you turn on fan, the cooler it got. For me, I had to replace the heater core and that solved my problem. Just one solution to think about.

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