Question about 2003 Chevrolet TrailBlazer

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2003 trailblazer I have no heat or air coming out of my dash vents

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If you hear an unusual noise coming from behind the glove box, there could be something in the blower fan. Remove the lower panel (3 - 7mm screws) then remove the glove box (2 - 7mm screws). Disconnect the electrical plug from the fan blower motor (2 pin connector) and the 3 screws holding the motor (5.5 mm screws). The motor slides downward. Inspect for debri in the fan.

Posted on Feb 17, 2013

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Is it no heat/air when sitting still, or no heat air period? If the heat and air blow slightly when driving you have a bad blower mower/resisitor and its not allowing the air to blow into the cab. If not blowing period when moving probably bad heater controls or fuse... Worst case scanario is you have an electrical problem that needs to be diagnosed

Posted on Jul 17, 2010

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Weird noise and vibration in the dash when I turn my heater on in my 2003 Chevy trailblazer LS... When the heat is higher then the #3 setting it vibrates bad I can feel it all the way down in the petals......


Your heating system is broke in the dash. The doors or gates that change where the air is to go, has a broken hindge or actuator. Your heat is set to defalt to the defrosters as a safety thing. The vibration, I would say, is your fan & it may have been the thing that started your whole problem. The fan has something wrong W/ it, weather it has dropped, the shaft that it runs on is bad, or it is just going to the bad. To fix, the whole dash has to be dropped so that the gates or doors can be accessed for repairs & the fan, it's half in & half out of the passenger compartment. I've had 3 or 4 dashes out to do this work but it is TIME CONSUMING. Wish you the best, GOD BLESS.....

Oct 22, 2014 | 2003 Chevrolet TrailBlazer

1 Answer

I have a 2003 Trailblazer and the dash vent is stuck on. When I try to switch it to the floor vents or the defrost it will start making a clicking noise and will not stop until I switch it back to the...


There are actuators,(little motors) that control air flow direction and temperature control. They contain plastic gears that are know to strip.the mode actuator in your vehicle requires the removal of the dash to replace according to ProDemand. I would suggest getting a professional to scan for trouble codes and advise.

Feb 07, 2018 | 2003 Chevrolet TrailBlazer

1 Answer

2003 Chevy trailblazer, the 4 front dash air


{: ) Check first the fuse labeled HVAC1 10A at the rear fuseblock. If okay, the mode actuator could be faulty. You can try this: turn ignition switch and a/c off for a minute. Then turn ignition on, wait forty seconds. Afterwards, start the engine, and check your a/c again.

Aug 01, 2010 | 2006 Chevrolet Trailblazer

3 Answers

2003 Trailblazer Air Conditioner fan runs but no air out vents


thereis an actuator controling the flap t may be cracked causing the problem

Jun 24, 2009 | 2006 Chevrolet Trailblazer

1 Answer

AIR VENT PROBLEM


Chevrolet 2003 TrailBlazer

For a digital air flow system try resetting the HVAC unit. Either take out the fuse for the HVAC module or disconnect the battery for 5 or 10 minutes. Reconnect battery or replace fuse. Turn the ignition to ON and DO NOT STARTor ATTEMPT to START ENGINE !!. You should hear the actuators, motors etc resetting. This should take about 2 minutes . Then you can start engine. If this does not work, you may have a bad actuator under the dash.

Jun 07, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

AIR NOT COMING OUT VENTS


remove the selector where you choose floor or dash and check and make sure the cables connected

Mar 20, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

2005 trailblazer dash vents not working


CHECK TO SEE IF A VACCUM LINE DISCONECTED SOME HOW. OR YOU CAN CHECK BEHIND GLOVE BOX TO SEE IF VACCUM DOOR IS OPERATERING PROPERLY,NOT SURE IF IT IS THE SAME AS A 2003 S-10 BLAZER.

Oct 26, 2008 | 2003 Chevrolet Blazer

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