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The vents are opened and closed by vacuum. There should be a vacuum line running from the engine to the inside of the Trailblazer. That line is broken somewhere and it is not sending vacuum to the switch. That will cause it to blow to the top of the dash (defroster) and to the bottom (floor.) Find that line trace it back and splice a new line in where it is broken. That should fix the problem.
What else can I help you with?
Why would the dash vents on your 2004 Trail Blazer not allowing air flow?
It should have nothing to do with the vents itself. More than likely it's the blower motor that's not working.
How do you know which heater core you need to replace on a 94 ford aerostar front or rear you have heat but no defrost and stream comes out of the vents when heat is on?
Front heater core is in the dash, the rear heater core is all the way in the back of the vehicle. If you have steam coming out of the dash vents, the front HC is leaking. If you have steam coming out of the rear heater vents, then the rear core is leaking.
Why is there smoke and a piss smell coming from the front vents on a Lincoln Navigator?
you need a new heater core
Where are the vents in a trail blazer?
In a Chevrolet TrailBlazer, the vents are typically located in several key areas: the dashboard, where they direct air toward the driver and passengers; the floor vents, which provide heating or cooling to the lower part of the cabin; and the rear vents, if equipped, to ensure comfort for passengers in the back seats. Additionally, some models may have vents in the center console. Always refer to the vehicle's owner manual for specific details about vent locations and functionality.
In your 2004 Sienna when turn on heat warm air is not coming through backside vents just air is coming But hot air coming through front vents without problem?
um...I know why no one has answered this yet, cos no one knows what the heck you are talking about!! Try rephrasing it!!!!!
Why is smoke coming from the vents of your car?
Smoke could be coming from the vents of your car for a number of reasons. You may have an internal car fire.
Ac is blowing from all vents except front vents?
yes
What is the smoky smell coming from vents when have either heat or AC on in 2000 dodge caravan?
your heater core is leaking anitfreeze! heatercoreleaks antifreeze into the heater & ac vents causing a burnt spell & oily film on the front window.
What does it mean if you have steam coming out of your vents when you have the heat on?
It means you have a leaky heater core. You may also find the front passenger floor wet with engine coolant.
What does it mean when no air is coming out the vents?
The air is off.
Why does your Chevy blazer blow hot air out of vents?
Control problem, blend door not working are the places to start
On a 96 S-10 Blazer why would there be only cold air coming from the vents even though the engine temp is norm at 240 deg?
Your heater core may be clogged. Have the heater core flushed and refill the system with fresh coolant.
