My heater don't work in my 1999 GMC Yukon all it dose it blow cold air

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Claude Kayser

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Posted on Nov 18, 2015

Claude Kayser

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GMC Yukon AC and Heat Questions - Car Forums at Edmunds.com

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Jul 20, 2010 - 30 posts - ‎16 authors
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

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2answers

2002 gmc yukon xl rear heat blows heat front blows cold air

Try to back wash the heater core first if it doesnt work then its clogged up try to turn the heater on the front with the heater off for the back keep an eye on the temp guage if it goes up than normal then its clogged....

Fyi u have to run the engine for awhile with the heater fan on

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Feb 28, 2015 • 2002 GMC Yukon XL

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1998 gmc yukon temperature gauage jumping and cold air blows out vent but soon as antifreeze is added it stop jumping and blows hot air is it a heater core problem or a leak.

Have your cooling system pressure tested to find your leak.

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Feb 04, 2015 • 1998 GMC Yukon

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Hot to cold air in 1999 GMC Envoy

heater core plugged. remove heater hoses, use tap water to flush out core..

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Jan 17, 2013 • 1999 GMC Envoy

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Heater not working good will blow cold air then hot. low coolant light comes on.

I had same problem on my 2001 gmc yukon. I found leak under my water pump. I replaced it myself and the problem was cured. heater wont work because there is not enough water to be heated for the heater.

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Jan 25, 2011 • 2001 GMC Yukon XL

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1answer

My 2001 Yukon front heater blows cold air and the back heater blows hot air what can I do?

Check your heater control valves.

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Jan 19, 2011 • 2001 GMC Yukon XL

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1answer

04 gmc yukon heater air cold passanger side.

If this happens when you are idle, and then you get hot air as you drive, most likely you have low coolant and it only cycles as you drive. Get approved dextrom gmc coolat and cap off your coolant it is most likely low.

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Jan 17, 2010 • 2003 GMC Yukon XL

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1answer

I have a 99 gmc yukon i killed the battary i got a boost but started the car on aux power to put up the windows the A/C blower was on and i killed the battary agen. The next i jumped the the truck and had...

Find the small air conditioner relay and replace it. They are available at any auto store and may cost perhaps $15. The switches on the dash could also be not making contact but I doubt it. You may have to get a manual to locate where the relay is located on your vehicle.

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Aug 22, 2009 • 1999 GMC Yukon

1helpful

1answer

The air-conditioner on our GMC Yukon does not blow cold when stopped at a light or such. The fan still blows, but the air is not cold unless the Yukon is moving. Can this be fixed?

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.

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Jul 08, 2009 • 2002 GMC Sierra

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1answer

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

check you antifreeze level and make sure its full

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Jan 26, 2009 • 2002 GMC Yukon XL

61helpful

3answers

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

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Aug 25, 2008 • GMC Sierra Cars & Trucks

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My heater don't work in my 1999 GMC Yukon all it dose it blow cold air

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Claude Kayser

Blend Door Actuator Replacement 1999-2007 Chevrolet ...

GMC Yukon AC and Heat Questions - Car Forums at Edmunds.com

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2002 gmc yukon xl rear heat blows heat front blows cold air

1998 gmc yukon temperature gauage jumping and cold air blows out vent but soon as antifreeze is added it stop jumping and blows hot air is it a heater core problem or a leak.

Hot to cold air in 1999 GMC Envoy

Heater not working good will blow cold air then hot. low coolant light comes on.

My 2001 Yukon front heater blows cold air and the back heater blows hot air what can I do?

04 gmc yukon heater air cold passanger side.

I have a 99 gmc yukon i killed the battary i got a boost but started the car on aux power to put up the windows the A/C blower was on and i killed the battary agen. The next i jumped the the truck and had...

The air-conditioner on our GMC Yukon does not blow cold when stopped at a light or such. The fan still blows, but the air is not cold unless the Yukon is moving. Can this be fixed?

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

AIR CONDITIONER ONLY BLOWING COLD ON ONE SIDE AFTER DISCONNECTING BATTERY

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My heater don't work in my 1999 GMC Yukon all it dose it blow cold air

1 Answer

Claude Kayser

Blend Door Actuator Replacement 1999-2007 Chevrolet ...

GMC Yukon AC and Heat Questions - Car Forums at Edmunds.com

Add Your Answer

Attachments: Added items

Related Questions:

2002 gmc yukon xl rear heat blows heat front blows cold air

1998 gmc yukon temperature gauage jumping and cold air blows out vent but soon as antifreeze is added it stop jumping and blows hot air is it a heater core problem or a leak.

Hot to cold air in 1999 GMC Envoy

Heater not working good will blow cold air then hot. low coolant light comes on.

My 2001 Yukon front heater blows cold air and the back heater blows hot air what can I do?

04 gmc yukon heater air cold passanger side.

I have a 99 gmc yukon i killed the battary i got a boost but started the car on aux power to put up the windows the A/C blower was on and i killed the battary agen. The next i jumped the the truck and had...

The air-conditioner on our GMC Yukon does not blow cold when stopped at a light or such. The fan still blows, but the air is not cold unless the Yukon is moving. Can this be fixed?

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

AIR CONDITIONER ONLY BLOWING COLD ON ONE SIDE AFTER DISCONNECTING BATTERY

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2002 gmc yukon xl rear heat blows heat front blows cold air

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