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Have a 2003 gmc yukon that blows air out of the vents but will only blow cold air

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Coolant in system ??
Coolant flowing through 'Heater Core' ??
Code(s) present w/Scanned ??
Possible HVAC issue(s);Blend air door n HVAC box (Under Dash)-Temp Actuator-HVAC control head @ dash.....

Posted on Dec 11, 2014

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Posted on Jan 02, 2017

  • 2920 Answers

SOURCE: 2002 GMC Yukon blows cold air from the front, rear works fine

check you antifreeze level and make sure its full

Posted on Jan 26, 2009

  • 1 Answer

SOURCE: AIR CONDITIONER ONLY BLOWING COLD ON ONE SIDE AFTER DISCONNECTING BATTERY

Turn your AC off. Turn the car off Crank the car turn ac on drivers side to 60 passenger side to 90 press auto wait 1 minute turn AC off (very important) turn car off turn car back on switch driver's side 90 passenger 60 press auto wait one minute turn AC off( very important) turn car off turn car on AC 70 both sides press auto your ac should be blowing cold If not, you have an expensive problem

Posted on Aug 12, 2009

  • 44 Answers

SOURCE: 2004 GMC Yukon blows hot air out of the driver

Probably the left temp actuator. The wires in the right I/P junction block could have poor tension also, but it's usually the temp actuator.

Posted on Oct 02, 2009

  • 1 Answer

SOURCE: Air conditioner blows hot air after 30 seconds on

I have had this problem. I am not a mechanic...so to correct the issue temporarily, I simply turn off the car and restart. This has worked everytime for me. In extreme cases, I think you can also remove the AC fuse and start the car, which will also reset the computer. I also think that by taking the climate control off the "AUTO" setting has worked in the past.

Posted on Oct 27, 2009

  • 432 Answers

SOURCE: The air-conditioner on our GMC Yukon does not blow

Make sure that your coolant is full. That is usualy the cause.When you are at idle there is not sufficent coolant to be pushed thru the heater core.

Posted on Jan 05, 2010

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I just don't get why that doesn't work right in the first place. ... I have 99 Yukon that has a problem with the front air. .... $55,000 for my GMC, I guess expecting cold air when we push A/C and getting 90 degree blast ... 2001 Yukon XL 1500 Front heat & air fine, rear ac blows hot as if heater is on in all settings. More results from forums.edmunds.com

Nov 18, 2015 | GMC Cars & Trucks

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2001 yukon gmc a/c blows cold to rear warmer air to front a/c


Could be a blend door problem under the dash.

Jul 05, 2012 | 2001 GMC Yukon

1 Answer

2003 yukon xl front a/c not blowing cold air.back working just fine. added r 134 last week ,with low side pressure of 70 psi,high side at 275 psi.what could be the problem


{: ) Try to feel the the a/c accumulator for coldness. It is that metallic can mounted near the firewall, connected along the a/c suction pipe. Actually, 70 psi is still somewhat high. But anyway, if the accumulator is cold to touch, most probably the problem is on the front air distribution. Assuming that your front blower is working, the cold air could have been distributed elsewhere, to the other vents instead of the front vents.
It can be an actuator or an air vent door fault. There are also GM bulletins for this kind of concern like connector, wiring, or calibration issues. Depending on the retrieved codes by a scan tool, it can help narrow down the search and the cause, and eventually speed up the repairs. So goodluck.

Jun 11, 2011 | 2003 GMC Yukon XL

1 Answer

Air condition does not blow cold air unless driving. Hot air blows from vents when in idle


check if the a/c fan is blowing if it is then change ur a/c condensor

Jul 17, 2010 | 2002 GMC Yukon XL

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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

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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

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2002 GMC Yukon blows cold air from the front, rear works fine


check you antifreeze level and make sure its full

Jan 26, 2009 | 2002 GMC Yukon XL

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