Question about Chevrolet Suburban 1500

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My 03 suburban only blows cold air and will not blow air from anywhere but the defroster

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Coolant has to get to heater core under dash .check for low coolant level and or bad thermostat.blower forces air over heater core to inside of vehicle.alsao check for faulty control switch

Posted on Oct 13, 2009

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1 Answer

1996 suburban defroster don"t blow air


check under your dash to see if the plastic piece came disconnected or if something is blocking it

Jan 16, 2013 | Chevrolet Cars & Trucks

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The front air isn't blowing hard through the vents but some air is blowing through the defrost


The vents are not working properly. most run off of vaccum and that sounds like your problem. could also be the controls. suburbans are famous for this.

Aug 12, 2012 | 1996 Chevrolet Suburban

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My 03 Ford ranger's air conditioner blow cold air but it will only blow on defrost, it wont blow out of the vents


your controls for floor,vent.defrost ect. is in default mode due to a loss of vacuum.
you need to inspect vacuum lines for being lose cracked,or disconnected.hose will run from engine
intake manifold through firewall into the dash.i'd start at intake manifold looking for bad hose

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The air conditioner starts blowing hot air on the driver side while the passenger side blows cold air.


2004 Suburban air conditioner blows hot air to the dirver side but cold air to the passenger. This does not happen all the time but has occurred several times this last summer.

Sep 14, 2010 | 2003 Chevrolet Suburban 1500

1 Answer

Air conditioner blows hot air from dash


On most cars when you push a button or slide a lever to change your choice of location where you want the air to blow out louvers move inside the dash to redirect the air to your chosen location. When you switch from heat to AC other louvers move. These louvers are often powered by vacuum lines running from the engine. If one of these louvers is stuck or if you have a vacuum leak in one of the lines it may be causing your problem.

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When i have the heater/defroster on the heater below blows cold air while the defrost blows hot. when i switch to just defrost the bottom heater stays on and blows cold air. when i have front dash and...


It sounds like you have a blend air door stuck. This is in the housing of the heater a/c blower unit under the passenger side of the dash. There is a motor on the top of the housing that could possibly be stuck or on working.

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1996 GMC Suburban heater blows on floor


yes those controls are vacuum controlle. Could be as simple as a bad hose or connection.

Feb 18, 2009 | 1999 Chevrolet Suburban

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1997 chevy suburban


most american cars force the defroster to blow cold air, this is not a problem, it does this by design.

Dec 23, 2008 | 1999 Chevrolet Silverado 1500

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