I have a 2001 Chevrolet Silverado with a 5.3L V8 with 61K miles. My question is when the vehicle is at operating temperature, I do not get hot air out of the heater vents. I have checked the coolant level, and it is fine. What could the problem be?
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RIDE_RED250
ANSWERS: 8
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By the way this is an intermittent problem. The heater works sometimes, and then it dosent work.
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The next thing I would do would be to backflush the cooling system to make sure the heater core isn't just clogged. It may be a wise idea to replace the thermostat as well.
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it could be the fan blower, or possibly a thermostat,
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if the blower is working back flush the heater core and drain the coolant and refill not with dexcool
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Hey man I got a 2001 Silverado with the same engine and mine was doing the same thing and all I did was on the dash panel where the fuses are, open that up and take the HVAC 1 fuse out then turn the swith on, but not to run for 1 minute when the minute is up you should hear a click from the dash. Turn the switch off then re insert the fuse and start the truck then it should work. Mine did!
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The first thing I would do is check the cab air filters...
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I had the same problem with my 2000 Buick LeSabre. It turned out to be the motor that controls the heater "doors" on the inside of the firewall
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So the problem was; the Heater Core was clogged. I had it flushed and it worked like a champ! Then I smelled antifreeze every time I used it. It would blow out the vents... I finally convinced the Dealer that they had to replace the heater core, and after much negotiation they finally replaced it, under my Winn's Extended Warranty. I have had no problems since. Its been 3 months and works like new! Thank you all for your suggestions!!! :)
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