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Where is the blend door actuator located on 2003 GMC Sonoma?

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Should be right near the blend door as it turns the gears on the door...look under dadh near left of steering column. ..cheers

Posted on Jan 24, 2018

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Posted on Jan 02, 2017

harley9701ha

Bill

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SOURCE: cant find the blend door actuator on 2003 ford f150 super crew

The temperature blend door actuator is located on the right side of the transmission hump under the evap. case. The floor ducts cover it.

Posted on Jun 22, 2009

Anonymous

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SOURCE: How do you change a blend door actuator on a 2003

Not sure why previous poster showed you how to fix a switch in the door, but anyways.....
I had same problem as you.

My Yukon has the single overhead door, not the "barn-doors", hopefully yours is the same. Open rear cargo door. Using a trim tool (buy the set from Harbor Frieght for less than $10) remove the lower trim (at carpet), upper trim (at headliner), then the right pillar trim (mine has small Bose speaker in it). Loosen trim between passenger side back door and the cargo area main right rear trim. Remove main cargo area right main panel, by unscrewing the big black know, prying out the small plastic plug, and carefully disconnecting the AUX power plug (looks like a cig lighter outlet) once you can get behind the panel a little bit.

Now you are looking at the entire rear system. There are 2 of these actuators. The front one controls airflow going either to floor or ceiling vents, the rear one (towards middle of entire unit) controls AC vs heat percentage flowing through the ducts. Unplug the connector, and 3 screws to remove it.

Install is the reverse.

Posted on Mar 14, 2010

Anonymous

  • 12 Answers

SOURCE: where is temp door actuator located and what is easiest way to get to it

Behind the glove box only two screws. You will have to move the vacuum and it is right there.

Posted on Jun 15, 2010

johnjnail

john nail

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SOURCE: need to know location of

behind the right side of the dash, left side of the main air duct.

Posted on Jul 30, 2011

Freddy

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SOURCE: 2003 gmc envoy XL where is the blend doors

Here is a diagram of the front HVAC system.

freddyboy61_15.jpg

Posted on Aug 29, 2011

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Heater blend door


They are under the dash behind the glove box.

Jul 14, 2013 | 1996 GMC Sonoma

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I have air coming out of my defrost and heat, but not hot air, but have hot air going to the rear heat. 2003 GMC Savana


You have either a blend door problem,or the blend door actuator. Both are located underneath the dash.

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1 Answer

I have a 98 GMC Sonoma and the A/C will not work. It only blows heat even when its in the Max A/C position. Do you think this could be the blend door actuator? It is manual not automatic


Yes - a blend door is definitely a possibility, especially if it blows heat. If the A/C was low on freon - the temperature would be at least ambient temperature.

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My 99 GMC Safari has heater stuck at 75% defrost and 25% vent...no leg heat...something is stuck...how do I get at it to loosen it up or fix?


blend door actuator is stuck or burnt out or actuator door is jamed
locate and place remove motor actuator check if blend door move freely
if not repair or disloged foring object (pencil pen---comb---etc)
if ok before installing actuator plug back in harness and move selector switch
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Apr 02, 2011 | 1997 GMC Safari

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My 2001 gmc sonama heater doesn't work ..only blows out cold air...what's wrong?


This no heat problem is one off two things, you may be low on coolant and its not flowing into heatercore or the actuator motor that controls the blend door is bad, the blend door is a door in the heater boxs that opens or closes to give you hot air or cold.

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1 Answer

I have a 2000 GMC Sonoma. The heat gets warm until the fan is turned on then the air turns cold. Acts like it is not switching over from ac to heat. what can i do about it?


Probably the blend door not actuating. I do not have the manual on where your door actuator is. It's usually right of center under the dash. Look under there and see if you can see anything trying to move when you change the temperature setting. Also, if you hear a clicking noise, that would be the actuator stripping it's gears. If youy can find the actuator, take it off and see if you can manually rotate the door hinge. If yes, replace the actuator. If not, you will have to remove the heater box to find out why the door is jammed. The actuator looks like this:

c64cdd8.jpg

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1 Answer

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The temperature blend door actuator is located on the right side of the transmission hump under the evap. case. The floor ducts cover it.

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