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2003 Trailblazer Vent Actuator?

Hi- I've been told the vent actuator door is stuck on my 2003 Chevy trailblazer. No AC/Heat from front vent, but floor and defrost ok, as well as back seat vents still working. Apparently a common problem with this make/model. Any fixes? Trying to avoid going to dealer and pay $$ for simple fix. Mechanic wanted $600 to take apart dash, but I remember reading a more simple fix where dash could remain in place???? I'm not able to do work, but looking for some help in Baltimore area. Thx for any info.

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 462 Answers

SOURCE: p0014 engine code

THE CAM SHAFT ACTUATOR IS LOCATED IN THE CYLINDER HEAD ON THE FRONT RIGHT HAND SIDE JUST ABOVE THE POWER STEERING PUMP. AFTER YOU REMOVE THE ACTUATOR CHECK TO SEE IF ANY OF THE SCREENS ARE DAMAGED OR MISSING. IF SO REPLACE THE ACTUATOR. ALSO CHECK THE CRANKSHAFT END PLAY. IT SHOULD BE BETWEEN 0.0044" - 0.0153". if excessive crankshaft end play is causing this concern, it will be obviously out of specification by as much as.050" or more when a pry bar is used to move the crankshaft back and forth. IF THIS IS THE CASE AN ENGINE REPLACEMENT IS RECOMMENDED DUE TO THE AMOUNT OF DEBRIS IN THE ENGINE. IF NO EXCESSIVE CRANKSHAFT MOVEMENT NOTICED REPLACE THE CAM ACTUATOR. IT WILL ALSO BE NECESSARY TO DO AN OIL CHANGE.

Posted on May 23, 2009

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  • 462 Answers

SOURCE: need to recalibrate the actuator pulling out the hvac fuse b for 10 second

THE HVAC B FUSE IS LOCATED IN THE FUSE BOX UNDER THE REAR SEAT. IT IS FUSE 36. CLEAR ANY CODES FIRST. REMOVE THE FUSE FOR 10 SECONDS, REINSTALL THE FUSE, START THE ENGINE, WAIT 40 SECONDS FOR THE ACTUATORS TO RECALIBRATE.

Posted on May 24, 2009

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SOURCE: front fents not working on chevy 2004 trailblazer other vents ok

yes, if you vent is not working when adjusting direction control, the problems is behind the ac control unit, common problems with GM. you going to have to tear into the dash and see what linkage broken or came off, not hard to do on blazer if have some mechanical incline background and some tools, it not hard but time consuming. Or drive behind any dealership and ask any mechanics does he know any one does a side work, you be surprise, many shop have mechanics that does side job, saving you lots of money from shop cost. 35-40 buck to fix with out part.

Posted on Aug 13, 2009

  • 242 Answers

SOURCE: ignition actuator rack broke from acuator rod

Yes unless the rack has been broken also, most parts stores carry them. Just turn your key and see if it moves or not. The out side shell of a colloum is mainly for looks.

Posted on Aug 28, 2009

  • 1509 Answers

SOURCE: How to put an actuator in a 2002 Trailblazer

Lots of things can be called an actuator. Door lock Mirror adjust, overdrive, and 4 wheel drive to name just some. The door lock is the most common and it's held with one rivet near the bottom of the door and the new actuator will come with a new revit. With the door panel removed and you reached around and made sure that your on the right one drill or chisel out the old revit, pivit arond the actuator to get the wire unpluged, Look at the new one to see how it goes. unhook the lingage on an angle and slip in the new one. Not bad to do if your used to doing stuff with out watching your hands. ( sort of like under the covers at night ) Then you'll get it done fine. The other actuators you need to say whitch one, 4 wheel drive?

Posted on Nov 16, 2009

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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

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 Pro Demand. I would suggest getting a professional to scan for trouble codes and advise.
Good luck

Feb 07, 2018 | 2003 Chevrolet TrailBlazer

2 Answers

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...


Mode Door Replacement

Removal Procedure

  1. Remove the I/P carrier. Refer to Instrument Panel (I/P) Carrier Replacement in Instrument Panel, Gages and Console.
  2. Remove the screws from the mode actuator.
  3. Remove the mode actuator.


  4. Click to Enlarge
  5. Remove screws in order to separate the defroster/mode outlet cover (2) from the HVAC module assembly (1).


  6. Click to Enlarge
  7. Remove the mode door (1) from the heater module.

Maybe the actuator needs to be replaced?

Jan 27, 2018 | 2003 Chevrolet TrailBlazer

1 Answer

I am working on a 2003 Chevy Trailblazer and the vents just blow out warm air, and will not change to the defost vents or the floor vents. Can this be the blend door actuator? And if so where is it


yes it could be the blend door, could be broken, or the actuator, or could be the climate control too, if you know where the heater core is then you just found the blend door, goodluck. Thanks

Oct 23, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

The air condition in my 2003 trailblazier works in the back, side, and floor. The vents in the front will not blow out any air. Sometimes it works and sometimes it will not.


{: ) You can try this: Turn a/c and ignition switch off. Wait a few seconds, then turn ignition on but don't start yet. Wait forty seconds while tring to listen for some unusual noise underneath the dashboard (near the gas pedal area). Something like an air vent door getting stuck or binding.
Afterwards start the vehicle,wait another forty seconds again before you check again a/c operation. If the problem persists, the possibilities are: a faulty mode actuator, a binding air vent door, or the HVAC actuator harness. The last two possibilities may require removal of dashboard, partly or wholly. I just hope you get lucky.

Jun 20, 2011 | 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

1 Answer

2003 Trailblazer No air from front face vents


first check to see if you have power going to the actuators when you switch the switch to it location if no power replace controller if you have power and no movement from actuators replace actuator. if actuators move remove hvac box and check for broken blend doors.

Jan 22, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

The heater / ac control only works with one or two desired settings.defrost will not work at all (2006 chevy trailblazer)


The actuator motor that controls the defrost,to floor,to vent ,has gone out,this will be a job to take to the shop,the dash will have to be pulled out toward the seats to replace the actuator motor.

Jan 21, 2010 | 2006 Chevrolet Trailblazer

1 Answer

A/c blower issue. 2202 chevy trailblazer


your blower resistor bad or the blower motor control switch is bad. no air flow from top vent make sure vent open.because you can manual adjust them not to blow air on you.if all is good.you have leaking vacuum hose or vacuum actuator.or air door stuck.the AC and HEATER control switch.is bad.its not allowing vacuum to open air door.

Jun 22, 2009 | 2002 Chevrolet TrailBlazer

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