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2003 GMC Yukon Heater/AC Control switch works in defrost mode only. Any ideas?

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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

  • 2 Answers

SOURCE: remove front dash cover, 2003 cavalier & rep ac control cable

Unfortunately, you can do it, but you will have to remove your entire dash in the process.  It's not really difficult, just time consuming.  You can remove the front dash cover by opening the doors and removing the covers on each side.  They are just clips that hold them on.  Take a flat screwdriver and carefully pry them off. You will then see screws on the side that you will need to unbolt, and I believe there are 2 more screws pointed upwards that you can get to if you open your glovebox.  After those screws are removed, remove the defroster grill in the middle of your dash.  There is just one screw to remove and it unclips.  Now you can pry the entire top part of the dashboard off.  There are more clips holding it on, so just be careful when you do it. After that, you will see a bunch of screws on the top side that you can unbolt and then you will be able to remove the front cover that sits behind your steering wheel. With these pieces out of the way, you can finally unbolt the front cover where your stereo is and get at whatever your trying to get at to fix your defroster/control knob.  
I had to go through all this when I installed my aftermarket stereo.
Good Luck!  

Posted on Jan 23, 2009

  • 1 Answer

SOURCE: The Heater fan in my 2003 GMC Yukon XL will not turn off

I don't know if you already fixed it, but I had the same problem on my 03 yukon, TysonRicky is right. In my case it was the blower control module. You can find it right under the glovebox. It cost me close to $100 for a new one, but very easy to replace. Can't even imagine how much it would've cost me if I had a mechanic do it.

Posted on May 19, 2009

roniecon
  • 6826 Answers

SOURCE: Fuse is OK but air conditioner doesn't work '94 GMC Yukon.

yes alow presure switch is likely on GM and it could be out of freon ,safe way to tell is to put a set of gauges on it and it will tell by passing the low side switch will just destroy the compressor if it is out of freon

Posted on Jun 28, 2009

  • 117 Answers

SOURCE: Gmc yukon stuck in park.

possible brake switch not sending signal to shifter solenoid to allow shifter movement. possible broken shifter knob/relay rod in shifter assembly

Posted on Nov 15, 2009

  • 112 Answers

SOURCE: The 4wd is not working on my 2003 gmc yukon,

Does the truck have a push button selector on the dash? If so, you need to replace the drive motor on the transfur case.

Posted on Jan 03, 2010

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1 Answer

My 2003 Yukon Denali no longer blows air from the front Front air vents


Do you know how to do automotive electrical testing ? Videos on youtube showing how to do it . Does your Yukon have manual or automatic Heater/AC system ? Could be the blower motor is bad , blower motor control module (if automatic ) Do you hear the blower motor running ? 2005 Chevrolet Tahoe Blower Not Working Chevy GMC same thing

Dec 04, 2016 | 2003 GMC Yukon Denali

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1995 Yukon blower and air direction do not work


I had the same problem. Fixed it by changing the climate control knob assembly on the dash. I was able to get a brand new one still in the box on ebay. Cost $150.00 the 1995 will not interchange with any other year even though others look similar the back is different. New they wil run into the $300.00 range. You get all knobs and switches including the push buttons for the AC. These units require a gentle touch easy to break. Good luck.

Nov 26, 2012 | 1995 GMC Yukon

1 Answer

My A/C will only blow through the defrost. I have a 2003 yukon XL. The back A/C works fine.


it is vacuum controled and when the controls on the dash recieve no vacuum, the system defaults to the defrost only air flow mode.
Starting at the vacuum source on the intake manifold, check the vac line as it goes through the firewall, i believe there is a small plastic check valve that sometimes leaks.
Its just going to be a matter of following the path of vacuum all the way to the control unit if needed


2008-01-22_170556_vac.jpg

Jun 09, 2011 | 2003 GMC Yukon XL

1 Answer

Heat blows out at floor only and ac does not come on even though light Indicates it's on. Has rear defrost and light works..Also has recirculating air button . I'm guessing the whole heating control in...


I would first remove the fuse for the heater control head for one minute and then put in and retry.
The control head could have locked up on you with a volt spike. The rear defrost switch does not go through the same circuit in the heat as the hvac controls. Could be a broken know also.
Could also be mechanical linkage on side of heater box above accelerator pedal may have broken or popped apart. or if electrical motor control may be actuator.

#76-11-01: HVAC CONTROL KNOB SPINS FREELY (REPLACE) - (Oct 9, 1997) 999999995.gif SUBJECT: HVAC CONTROL KNOB SPINS FREELY (REPLACE ALL THREE KNOBS)
MODELS: 1996-97 CHEVROLET AND GMC M/L AND G VANS 1995-97 CHEVROLET AND GMC C/K TRUCKS
CONDITION:
SOME CUSTOMERS MAY REPORT THAT ONE OR MORE HVAC CONTROL KNOBS SPIN FREELY, RESULTING IN LOSS OF FAN, TEMPERATURE AND/OR MODE OPERATION.
CAUSE:
THE KNOB'S PLASTIC INNER SHAFT MAY CRACK WHEN FORCED AGAINST ITS STOP.
CORRECTION:
IF ANY ONE OF THE THREE HVAC CONTROL KNOBS EXHIBITS THIS CONDITION, REPLACE ALL THREE KNOBS WITH NEW P/N 16268157.
PARTS INFORMATION:
P/N DESCRIPTION QTY 16268157 KNOB, HVAC CONTROL 3

Sep 27, 2010 | 1995 GMC Yukon

1 Answer

The air only blows out the defrost


this is caused by a loss of vacuum from the engine vacuum canister to the AC control switch, the canister is located under the hood, check the under hood vacuum diagram for exact location

Jul 21, 2010 | 2003 GMC Yukon XL

2 Answers

2003 gmc Yukon 5.3 ..2WD air conditioner blows


A vacuum hose that controls the little door that switches where the air blows from is off, its gonna be a real chore the find which one and take the dash out to get to it, but you might get lucky and be able to look underneath the dash from the passenger side and actually see it, good luck

Jun 19, 2010 | Cars & Trucks

1 Answer

GMC 1995 Yukon climate control ac and heat. Heat stay on when control switch is all the way on low. Also the ac will not come on.


Do you have rear ac and rear window defrosters if so the heater switch has failed. A GM priority diode unavailabe to any one but GM. Head to the local auto recyclers or pop for the $200 switch from your local GM dealer

Apr 04, 2010 | 1995 GMC Yukon

1 Answer

GMC 2003 truck heater/ac not consistent.


check for any vacumm hose leaks that comes from the engine to the ac box, check for vacumm actuator proper operation.

Jul 21, 2009 | 2003 GMC Yukon XL

1 Answer

Heater/defrost control knob


Here's the wiring diagram of the manual AC controls. I suspect the problem is in the 'mode' switch/motor.

47fdc72.jpg

Dec 23, 2008 | Hyundai Motor 2003 Elantra

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