Question about 2001 Chevrolet S-10

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2001 Chevy s10 with no heat

I have a 01 Chevy S10 and I have no heat coming from the vents. I've flushed the system twice and I've changed the heater core... no change. I really don't want to go another winter with no heat. Can anyone help?

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  • dmassa Oct 14, 2008

    I have the same problem, there is heat coming out at the floor, but when I switch to vent or defrost all I get is cold air.

  • Anonymous Nov 23, 2008

    i have a 1996 s-10 with no heat. the thrermostat is working but the temperature gauge doest come up over 120 degrees. All the controls are working.

  • Anonymous Dec 04, 2008

    2001 S-10 91,000 miles.

    2 months ago the heat stopped. Air is coming fromt he vents. No heat.
    Had oil changed, then suddenly it was working again.
    2 weeks ago it stopped. Now gauge won't go over 110.

    replaced Cap, flushed system. No change.


  • capt gwedo Dec 14, 2008

    2001 chevy s 10 no heat get up to 115 but it run fine



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If you are certain there is no air in the coolant system, then there is a chance that the blend door motor is not working or the heater control assembly is bad. since you have replaced your own heater core you probably noticed the the doors inside the heater core housing. One of those doors is controlled by the "hot/cold" knob. The motor on that door could bad.

Posted on Oct 21, 2008

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Turn on your heat and touch the hoses that enter the heater core see if they are hot going in and coming out if they are hot it could be that your blend door for hot and cold is not working that is under the dash on the pass. side.

Posted on Apr 05, 2009

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I have had this problem of no heat with my 94 S10. I have flow through my heater core ( both intake and return lines are hot ) and still no heat ! I figured out how to fix this ! If you have tryed everything or before you spend and replace heater core, thermostat, flush ect... try the switch/dial where the hot/cold button is ! THIS IS HOW YOU FIX IT ! my switch was arced out and hence it could not acknowlege itself to turn on the heat ! Take the switch apart. If you see black burned stuff you need a new one. Bend back the four bendable tabs and look at the inside. If it is full of grey oxidization clean it with some rubbing alcohol until shiny. I know this is the answer if all else fails and cleaning or replacing a dial switch is a cheap alternative to other parts ! Good luck ! :) Doucette

Posted on Oct 10, 2009

  • Jimc2011 Apr 10, 2011

    My 94 S-10 switch stopped working I have hot and it switches between defrost and heat, just no fan not even on ? Sounds like the switch I'll try oillcanman trick , thanks


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My 2001 S10 Extreme 4.3Ltr had the SAME 'No Heat' Issue.
First with the engine running and the heater in the on position set to hot, I acknowledged that the heater hose coming from the block was warm, while the hose coming from the heater going to the water pump was cold, meaning blockage.
I then went to the parts store and purchased a cooling system flush and the flush kit, and then followed the instructions.
Basically speaking the cooling system usually builds up a blockage {like a blood clot} at the very small orifice that leads from the block to the heater {heater hose connection tube}.
Following the instructions, Flush the system and then replenish the coolant. WALLA!

Posted on Dec 18, 2008

I had the same problem with my 1999 mechanic replaced a part that i cant remeber the name of but it was only $20 and a 2 second installation....i can send you a pic of the part if your still having the problem.

Posted on Oct 10, 2008

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Change the thermostat to a winter temperature one. ... if you are getting no heat at all there is a possibilty that there is a blockage in one of the hoses as well or air in the system... are the vents even working properly ?


Posted on Sep 26, 2008

  • Jim Darby Nov 14, 2011

    How do you ensure the system is full of coolant?
    How much flow should go throught heater core?


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