Question about 2001 GMC Sierra C/K3500

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Heater blowing not so hot

2001 sierra 1500 sle z71. heater works but air only feels warm if you put your hand to the outlet. Just doesn't seem to be getting as hot as it should. i just bought this truck, so dont know its maintenace history. any suggestions?

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  • Anonymous Jan 15, 2009

    Same thing, my 99 chevy z71 heater not blowing as hot as it used to.

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How hot this gets is often regulated by the engines ability to properly heat up. This is controlled by the engine thermostat. Alot of times, people who have an overheating problem simply remove the thermostate without replacing it. This does not allow the engine to heat up properly (it actually is running too cold) thus the water coolant does not heat us. result, barely warm air through cabin heater.

Posted on Mar 15, 2010

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