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Last week I noticed my passenger side powered seat on my 2017 Sierra Denali was no longer working. Just dead, switches resulted in no movement.
Checked the fuse and it was blown, replaced with a spare and tried the seat again.
Lower seat switch worked fine. Seat back switch worked fine. The moment I moved the lumbar support switch I saw a flash come from underneath the seat and the fuse was blown.
I replaced the fuse again and - nothing. The seat is now dead. The driver's seat makes a sound like a relay switching when you move the switches, but I don't even get that on the passenger seat now. Verified again that the fuse is fine, moved it to the rear sliding glass to test.
Anyone have any idea what may have broken? I understand it appears I have/had a short somewhere in the lumbar support, but now the whole passenger seat seems to be dead. Is there a relay somewhere that would need to be replaced? Anyone have the powered seat wiring diagrams?
Would anyone, at minimum, be able to remove their passenger side seat fuse and tell me if they hear the relay switching noise even when the fuse is removed?
First post since I've always been able to find the answer here before with some creative searching, but not this time.
I recently purchased a used 2018 Yukon Denali (4x4) w/ 43k miles. I have noticed a sound/sensation combination since shortly after taking possession of it. It is a slight "clunk" that reverberates through the seat and I both hear and feel it.
It FEELS like my seat track is moving 1/32" or 1/64" forwards or backwards each time I come to a stop or accelerate. It does not appear to be a lateral (side to side movement) as I do not notice it in turns.
I took it into the dealer and they installed some type of retaining clip that appears to be attached to the underside of the seat. I believe this is the GM version of the "hose-clamp" fix but it has not alleviated the problem at all. (And as I said, I did not notice any lateral movement before or after this was done ).
I was able to minimize the sensation by immobilizing one of the seat motors (which had some play in it) using a zip tie. The sensation of movement (or clunking) on the right side of the seat (closest to the center console)has gone away but the left side click/clunk seems to remain. I cannot find any lost parts or components under the seat though if I grab the seat as a whole and try to move it forwards and backwards on its track there is SLIGHT play and a similar sound (though it's quieter).
I tried to do the same thing with the passenger seat (also powered and heated/ventilated) but it has no play/slop/movement at all and I have sat in it while driving and have not felt it at all.
I have addressed the issue with the dealer but they seem to just be guessing at this point and although I have an extended warranty (the vehicle has 43k miles on it) it is a pain to use and it causes me to be without a vehicle for a day at a time usually.
I have searched and searched online and cannot seem to find mention of this specific issue except on the previous generation Tahoe/Yukons and those instances seem to involve much greater amounts of seat movement (1/4"-1/2").
Does anyone have a suggestion as to how to fix this issue? Perhaps a shim or a retention screw tightening, or any bulletin or other known issue that could help me ID exactly what's going on? (I've driven other similar vehicles of similar age and have never noticed this problem before and if I don't have to live with it I'd rather not especially while I have SOME kind of warranty in place).
Any help would be much appreciated.
Thank you in advance.
New here. I just got a used 2015 Yukon SLT and cannot get both the left and right seat haptic motors to come on at all. I did some checking and disconnected both the left and right motors and applied 12V to them and heard each of them go off just fine. However when i go into the intellilink menu, under vehicle settings, there is no option for me to change the alert type from beep to vibrate. Is this a software update of some kind? I can not find any information about this anywhere.
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