Question about 1999 Chevrolet Silverado 1500

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No heat !!! just blows cold air. I think it might be the thermostat. Where is that located on a 1999 Silverado? It is the small V8

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The problem is most likely the control panel. it is very common that they go out and very easy to replace. just pop off the face plate that surrounds your heater controls. then pop out the heater controls. no tools are required. take that to a dealer and get a new one.

Posted on Oct 22, 2008

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Could be the heater core valve, check the cable that opens and closes the water valve to the heater core.

check also the setting of the temperature level. it could still be set to cold.

wait for a few minutes for the water to heat up on the radiator. you could have tested it after you start the car and the engine is still cold.

tnx 4 using fixya,

drcool

Posted on Oct 08, 2008

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No in 99 chevy silverado


Sounds like the blend door is not moving. Most blend door actuators are located on the bottom of the heater box near the middle of the car. If the temp control is a round knob, it is an electronic actuator.

Dec 12, 2012 | 1999 Chevrolet Silverado 1500

2 Answers

What could cause my truck to have no heat?


the heater radiator could be blocked or the valve controlling the heater could be faulty ,,,, carefully check the heater hoses ,, they are the small ones running from the engine bay through the bulkhead into the car,,,they both should be hot ,,, if one is cold the water is not circulating either due to a blockage or the heater valve not working ,,, if the car has climate control you need to be sure that it is serviced properly as this system mixes the hot and cold air,, also at 210 you should have some heat , the best way to check if its the thermostat is to run the carstationary until it gets hot even if the thermostat is faulty the system will build up heat due to no cold air passing through the grill and coolng the engine radiator

Feb 11, 2012 | 2001 Chevrolet Silverado 1500

1 Answer

I have a 1999 Chevy Silverado with a 4.8 V8 Engine. The AC only blows out hot air. I have checked and the compressor is coming on and the lines are getting cold but there is only hot air coming out of the...


A blend door problem . Mine has it also. Not a repair for the faint of heart. Get someone that has been there and done that to fix it. (Dash will be coming out)
good luck

May 27, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

My 1999 ford windstar is only blowing cold air and no heat


possable problems:

1. coolant leak (level too low to fill heater core)
2. headgasket leak forcing the coolant out of the overflow.
3. stuck thermostat.
4. bad water pump. if the impelers are broken, coolant wont flow.
5. HVAC malfunction. system may think you selected cold or is unable to move diverter. maybe a fuse,solenoid or vaccum leak? (hvac controler uses vaccume controled soleniods)
6. airlock. if you have resently changed your coolant, you may need to repeatedly squeeze the heater core hose to help force out the air.

May 19, 2010 | 1999 Ford Windstar

4 Answers

1989 chevy silverado heater blowes cold air. both heater hose are hot. bargraph adjust from hot to cold.what next.


Feel the hoses going into the heater on the firewall. If one is hot and the other is cool, then the heater control valve is not working for whatever reason. Check the flow valve.

Nov 07, 2009 | 1999 Chevrolet Silverado 1500

2 Answers

No heat. Fan blows cold air.


I think u may have an air temperature control blend door problem, the door is moved by a small electric motor, it is stuck in the cold position.

May 12, 2009 | 2000 Honda Accord

1 Answer

1999 Chevy No Heat, and Overheating.


did it over heat before the therm? if not it is the wrong therm. Other than that you have to have a air pocket.

Feb 13, 2009 | 1999 Chevrolet Silverado 2500

1 Answer

Heat only blows out briefly then changes to cold air


Heater core could be pluged up, try flushing it out, it could have sedament build up restricting flow into heater core. Also make sure its full of coolant.

Feb 06, 2009 | 1999 Chevrolet Silverado 1500

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