2012 Yukon Denali Lumbar Support Repair

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yukonlou

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Jut got the Yukon a few weeks ago. I noticed that the driver's lumbar support would go in and out, but anytime i wanted to move it upwards, a grinding/popping sound would emanate form the back of the seat but no movement took place.

I finally took the seat apart today and found that there are a couple of small tabs in the part of the lumbar support that goes up and down that were broken. The tabs engage in the lower portion of the support and allow it to be pulled up via a couple of cables in a push/pull fashion (see 1st and 4th pictures). A picture shows the two rectangular holes where they engage.

I had to pretty much disassemble the rear mechanism in order to remove the part with the broken tabs. I removed some of the wiring from their holders and disconnected the white cable from its cross member support in order to remove a Z connector. I took some pictures as reference. There are some sharp edges in there. Be careful.

I did not find the broken tabs in the bottom of the seat... I decided to repair it by using some 16 gauge steel I had in the house. I cut it to shape and welded it to the pull mechanism. I did not know how long to make the tabs, so I just eye balled them. I could always file them down a bit.

I added a couple of tack welds to the sides of the tabs to add some additional strength. They are not the prettiest welds, but they will hold nicely.

I will put the whole thing back together tomorrow.

IMG_2794.JPG IMG_2796.JPG IMG_2799.JPG IMG_2802.JPG
 
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The lumbar moves up and down? I did not know that! I'll have to play with the buttons next time I'm in it!!

2001 Yukon SLT
2012 Yukon XL Denali
2011 Yukon Denali RIP 5/20/18

Sent from my SM-G930V using Tapatalk
 
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Well I'll be damned, says so right in the owners manual... 82ab7383f4cfc4369c9c9ab8680c0856.jpg

2001 Yukon SLT
2012 Yukon XL Denali
2011 Yukon Denali RIP 5/20/18

Sent from my SM-G930V using Tapatalk
 
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yukonlou

yukonlou

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Got it all back together... Just some minor filing of new L brackets to make them fit. Added some silicone grease to the sliders to allow easier movement. I noticed that the cooling fans for the seats did not work. Do not know it temperature related... Currently 41 in NJ. Will wait until Spring to check again...
 

ls1frc

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Mine has been broken forever and I can't figure out how to get the back plastic seat cover off.
 

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