Question about 2001 Chevrolet Silverado

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94 silverado no heat, replaced heater core and t-stat

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Sounds like the door that switches from hot to cold is stuck. I think it uses an elec servo instead of vacuum. try to set it on cold for a bit then switch it back. sometimes that use to work on mine

Posted on Jan 10, 2010


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My heater core is fine in my 1998 dodge ram 1500 Laramie but i am getting very little heat

You can try replacing the water pump, but your heater core isn't fine. Unless you just replaced it. In that case you haven't purged all the air out of it.

Jan 23, 2015 | Dodge Cars & Trucks

1 Answer

No heat in my 2001 silverado

Check your thermostat first,could be staying open,not letting your coolant to heat up.If not that then the heater core could be bad.Here's how to check and remove,Here's how to replace heater core.

Dec 05, 2012 | 1999 Chevrolet Silverado 1500

1 Answer

I have 2000 astro van and I'm not getting heat, I changed thermo stat and flushed heater core. Still no heat, whats the next step?

Feel your heater hoses. If both are hot, the core is circulating. If only one is hot-poor or no circulation of the core.
If the heater core is circulating, the temperature blend door may not be working to let blower air pass across the heater core, and into the vents. If vacuum operated, watch the vacuum valves as you move heater controls-you may spot the problem. Check that the vacuum line from the engine to the control switch is working and still connected. If not operated by vacuum, the controls may have cables to the heater case or may be electrically operated. You'll just have to scope it out. Good luck.

Nov 24, 2012 | Chevrolet Astro Cars & Trucks

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1994 silverado heat is not working. Replaced thermastat, heater core and checked fuses. Still no heat. The blower motor (high, med, low, is working fine.

I think that one still uses cables to control the blend doors and vent doors. Are you sure those are working and/or connected.

Also when you replaced the thermostat and heater core did you bleed the cooling system? With the engine cold remove the radiator cap and let engine idle up to operating temp while keeping the radiator topped off with coolant.

Are the hoses going to the heater core hot?

Dec 06, 2010 | 1994 Chevrolet Silverado 2500

1 Answer

Was overheating replaced t-stat now wont put out heat

If you drained your coolant when you replaced your t-stat i would say you have air in your system at your heater core causing a pressur lock. Pull one of the lines off that goes from your heater core to the engine and bleed out the air. You may have to do both lines depending on the direction of flow thru your engine.

Feb 02, 2010 | 1998 Ford Taurus

1 Answer

How hard is it to change a Heater Core on a 1996 Chevy Silverado. My heater is worthless. I've changed the Thermostat with a Stat 195 degree and flushed out the heater core. Still no heat! I've also...

If you flushed out the core and have good flow through it, likely the blend door inside the heater box is not opening. Check the vacuum motors on the box and make sure they are moving as they should.
How difficult the job of removing the core is depends upon your skill level but no one I know likes doing one. Get a chiltons or haynes manual and review the process before attempting the job...if it sounds difficult, don't do it (keep the manual though it's helpful for other stuff)

Jan 30, 2010 | 1996 Chevrolet C1500

2 Answers

We replaced the thermostat and still no heat. We unplugged the hoses to the heater core and water would run through the core. I still have no heat.

Check the heater hoses,if they are both getting warm,then there is a temp door not opening inside the blower box,It may be cable driven on this model,just look and see,you can move it manualy with your hand to get the heat.

Jan 08, 2010 | 1988 Toyota Pickup

1 Answer

No heat


Check to make sure your control lever is not disconnected. First

Check the motor controlling the heat cold/hot DOOR window. Sounds like its in the cold position, thus you are not getting the heat. The door needs to move and shut off the cold intake so that the air is passing through the heater core.

The third item is, although you flush the heater core, it can still be clogged up, in which case you will have to replace it. You probably flush the tanks of the heater core. Think of it as a miniature radiator. The tanks get clean, but unless the hot water passes from one end to the other through the vanes there is not heat, because the heater core is not getting hot.

Nov 09, 2008 | 1997 Ford Windstar

1 Answer

Heat Core Replacement

there is no diagrams your heater core is under your dash panel you must take the whole dash panel to replace the heater core.

Nov 02, 2008 | 1999 Chevrolet C1500

1 Answer

No heat comming out of fan

These are well known for clogged Heater Cores. I would have the heater core flushed if possible.

Sep 13, 2008 | 2000 GMC Jimmy

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