Check connection of ducts, check for blockage prevent air flow, check for vacuum problem prevent open/close of ducts
Blower circuit board is shot
A/C compressor not running
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.
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.
I recently had to change mine...about a $25 fix. Kind of a pain to do but not bad. The blow motor resistor is behind the glove box. well i have a 2003 Chevy trailblazer ext but i assume they are the same. just empty the glove box...and it kind of forward and exposes the parts behind it. mine was to the left. hope this helps!
If the air vents of the Chevy trailblazer 2004 are not blowing air, have the fuel pump checked.
try changing the settings on the rear air. the console is located above the windshield on the headliner. then turn off the rear air ducts using the center consoles controls. they are located at the back of the console. better to use back seats. this should restore the power to the front ducts.
I would start with about 3 quarts and run the engine and drive a LITTLE and check the level..and slowly add more fluid to the transmission. Overfilling can cause excess pressure and blow seals.
Perhaps a stuck door in the HVAC system or a blockage in the ducts.
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.
plugs at around 100,000 miles. blow out or replace the air filter. replace the fuel filter.
Watch the Wind Blow By was created on 2003-10-27.