Why does the defroster vents only work no matter what setting the selector is set to?

140

Asked by Dec 23, 2013 at 09:55 PM about the 2001 GMC Yukon XL 1500 SLT 4WD

Question type: Maintenance & Repair

No matter cold or hot, the air only blows through the defroster vents, no matter which
setting is selected.

5 Answers

107,615

Sounds like you mode door actuator needs replaced.

2 out of 2 people think this is helpful.
107,615

I believe your model has three ac/heater door actuators . 1) is for mode door 2) is for blend door 3) is for recirculate door

2 out of 2 people think this is helpful.
63,235

Check for a broken or disconnected vacuum hose coming from the intake manifold. If the system loses vacuum for some reason it defaults to defrost for safety reasons. HTH. -Jim

2 out of 2 people think this is helpful.
107,615

http://www.heatertreater.net/videos.html#chevy --- check this out it may help. There are also several videos on you tube.

4 out of 4 people think this is helpful.
140

Where do I find the mode door actuators?

14 out of 14 people think this is helpful.

Your Answer

Add photo

Related Questions

  • HVAC 1 answer

    HVAC fan is not working on setting 1,2,3, but is working on setting 4 & 5. How do I repair?

    2000 GMC Yukon XL

    -

    Maintenance & Repair

  • Disconnecting battery in storage 8 answers

    I want to disconnect battery for storage on my 2012 Denali XL. Manual recommends that's what I should do. Will that affect computer settings and/or drivability

    2012 GMC Yukon XL Denali 4WD

    -

    Maintenance & Repair

  • stall, backfire, died no codes 2 answers

    2001 Yukon after leaving highway pulling to a residential street dropt to idle then when tried to speed up but it bogged down and would not climb above 500rpm. when istepped on it would backfire even...

    2001 GMC Yukon XL 1500 SLT 4WD

    -

    Maintenance & Repair

  • 03 Yukon xl Denali traction active message on accelration 12 answers

    I have a "traction active" message come up while trying to accelerate. I turn off traction control to drive vehicle. I have checked with a live scanner an all wheel speed sensors show a default of 3...

    2003 GMC Yukon XL Denali 4WD

    -

    Maintenance & Repair

  • If I used my phone to set up account and pictures can I still edit them through my computer? 1 answer

    I set up my account with my phone and put my pictures in from my gallery. However, they are sideways so I need to rotate all of them. I see the edit feature through my phone account but it doesn't see...

    2010 GMC Yukon XL Denali 4WD

    -

    General

Yukon XL

Looking for a Used Yukon XL in your area?

CarGurus has 11,832 nationwide Yukon XL listings starting at $2,400.

ZIP:

Search GMC Yukon XL Questions

GMC Yukon XL Experts

#1 FordNut
FordNut
Reputation 340
#2 TK76
TK76
Reputation 290
#3 kbro
kbro
Reputation 170
View All

Related Models For Sale

Used Chevrolet Suburban
380 Great Deals out of 18,546 listings starting at $1,795
Used GMC Yukon
392 Great Deals out of 16,276 listings starting at $1,800
Used Chevrolet Tahoe
601 Great Deals out of 27,562 listings starting at $600
Used Ford Expedition
386 Great Deals out of 24,130 listings starting at $1,951
Used Cadillac Escalade
255 Great Deals out of 10,461 listings starting at $1,490
Used GMC Sierra 1500
875 Great Deals out of 64,409 listings starting at $1,500
Used GMC Sierra 2500HD
134 Great Deals out of 13,898 listings starting at $2,650
Used Lincoln Navigator
84 Great Deals out of 5,487 listings starting at $3,485
Used Chevrolet Silverado 1500
1,948 Great Deals out of 159,904 listings starting at $1,995
Used Toyota Sequoia
132 Great Deals out of 5,512 listings starting at $2,999
Used Ford F-150
2,410 Great Deals out of 209,424 listings starting at $895
Used Cadillac Escalade EXT
36 Great Deals out of 729 listings starting at $5,450

Used Cars For Sale

2017 GMC Yukon XL 1500 SLT 4WD For Sale
773 listings starting at $54,498
2016 GMC Yukon XL 1500 SLT 4WD For Sale
9 Great Deals out of 572 listings starting at $39,995
2015 GMC Yukon XL 1500 SLT 4WD For Sale
4 Great Deals out of 205 listings starting at $35,995
2014 GMC Yukon XL 1500 SLT 4WD For Sale
58 listings starting at $19,897
2013 GMC Yukon XL 1500 SLT 4WD For Sale
7 Great Deals out of 137 listings starting at $17,995