If the air vents of the Chevy trailblazer 2004 are not blowing air, have the fuel pump checked.
The air of your Chevy trailblazer 2004 blow out of the front vents when the air conditioner is on because the air condition is faulty and it needs repair.
Probably the mode door actuator. We have instructions on the replacement procedure on our enthusiasts forum at www.trailvoy.com
if the fan motor isn't working, the fan motor has likely got a loose connection of some sort. if the fan does work but the reguler vents don't you might have something blocking them.
air want blow out vents
how do you fix chevy 20 ac to blow in correct vents
Could be the mode door actuator. For more info visit our enthusiasts forum at www.trailvoy.com
The blend door actuator may not be working.
Control problem, blend door not working are the places to start
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.
check the temp guage if low change the thermostat
Because there is a known issue with the brake lamps on the 2003 Trailblazer. I own a 2003 Trailblazer and had to take it in for service on a recall due to the issue. Take it to your Chevy dealer and have them check the VIN to see if the recall was ever done.
Theres a short in the circuit board that controls the Fan go to a Chevy dealer and have them replace it