2017 Seat Cushion Sinking

[rviscuso]

I have a 2017 Silverado LT with power cloth seats. Initially the drivers seat had a comfortable feel to it; nice suppport and firmness. After six months or so and a few thousand miles one day I noticed that I was not sitting at my usual height. The view out the windshield was different as well as the view out of the rear view mirror. My first thought was that the power height adjustment had changed so I raised the seat. The next day I was sitting way too high so I lowered the seat. I began checking the height position of the seat in relation to the floor mounts and discovered that it was not moving. It must be the cushion sinking. If I do not drive the truck for a few days the seat height is right where I expect it to be and the firmness is improved. After an hour or so of driving I notice that I am sitting lower. I check this by gauging the distance from  top of my head to the ceiling with my fingers. The longer I am in the truck the greater this distance becomes. The change is about one to two inches. Don't drive for a day or two and height and firmness returns.

 

I brought this to the attention of my dealer and of course they can not see anything wrong. I expect I would have to leave the truck with them for a few days. I'm thinking that one way to prove this would be to place a piece of wood on the seat then measure the height and photograph, go for a drive then measure again.

 

What do you guys think? Has anyone else experienced this?

[PMurray]

I have a 2017 Silverado LT with power cloth seats. Initially the drivers seat had a comfortable feel to it; nice suppport and firmness. After six months or so and a few thousand miles one day I noticed that I was not sitting at my usual height. The view out the windshield was different as well as the view out of the rear view mirror. My first thought was that the power height adjustment had changed so I raised the seat. The next day I was sitting way too high so I lowered the seat. I began checking the height position of the seat in relation to the floor mounts and discovered that it was not moving. It must be the cushion sinking. If I do not drive the truck for a few days the seat height is right where I expect it to be and the firmness is improved. After an hour or so of driving I notice that I am sitting lower. I check this by gauging the distance from  top of my head to the ceiling with my fingers. The longer I am in the truck the greater this distance becomes. The change is about one to two inches. Don't drive for a day or two and height and firmness returns.
 
I brought this to the attention of my dealer and of course they can not see anything wrong. I expect I would have to leave the truck with them for a few days. I'm thinking that one way to prove this would be to place a piece of wood on the seat then measure the height and photograph, go for a drive then measure again.
 
What do you guys think? Has anyone else experienced this?

My 14 Sierra Texas Dble Cab does the same. But more quickly. When I get in after my wife has driven, my adjustments are good for about 10 minutes of driving. Then I need to raise the seat or adjust the mirrors. At nearly 5 years and 60k miles I just accept it as being "normal" for this truck.

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[SS502]

2 hours ago, rviscuso said:

I have a 2017 Silverado LT with power cloth seats. Initially the drivers seat had a comfortable feel to it; nice suppport and firmness. After six months or so and a few thousand miles one day I noticed that I was not sitting at my usual height. The view out the windshield was different as well as the view out of the rear view mirror. My first thought was that the power height adjustment had changed so I raised the seat. The next day I was sitting way too high so I lowered the seat. I began checking the height position of the seat in relation to the floor mounts and discovered that it was not moving. It must be the cushion sinking. If I do not drive the truck for a few days the seat height is right where I expect it to be and the firmness is improved. After an hour or so of driving I notice that I am sitting lower. I check this by gauging the distance from  top of my head to the ceiling with my fingers. The longer I am in the truck the greater this distance becomes. The change is about one to two inches. Don't drive for a day or two and height and firmness returns.

 

I brought this to the attention of my dealer and of course they can not see anything wrong. I expect I would have to leave the truck with them for a few days. I'm thinking that one way to prove this would be to place a piece of wood on the seat then measure the height and photograph, go for a drive then measure again.

 

What do you guys think? Has anyone else experienced this?

Please don't take this wrong!!! I am about 240 pounds and I ain't 6'5" if you catch my drift...are you what some people consider a heavy person? I had this issue when I rode in my GF's Suburban but it didn't seem to happen to anyone else (as in lighter than me) when they sat in the same seat. Just throwing that out there, not throwing stones.

[rviscuso]

7 minutes ago, SS502 said:

Please don't take this wrong!!! I am about 240 pounds and I ain't 6'5" if you catch my drift...are you what some people consider a heavy person? I had this issue when I rode in my GF's Suburban but it didn't seem to happen to anyone else (as in lighter than me) when they sat in the same seat. Just throwing that out there, not throwing stones.

Good thing my fielders mitt was handy. I caught your drift but you'll have to throw a bit harder to take it wrong. To answer your question I am 5'10" and 170lbs. I have never had this problem in my 2003 Silverado or any other vehicle. Maybe like PMurray said that it is "normal" for this truck. But normal doesn't make it right.

[SS502]

Just now, rviscuso said:

Good thing my fielders mitt was handy. I caught your drift but you'll have to throw a bit harder to take it wrong. To answer your question I am 5'10" and 170lbs. I have never had this problem in my 2003 Silverado or any other vehicle. Maybe like PMurray said that it is "normal" for this truck. But normal doesn't make it right.

I would say you are height to weight appropriate so your cushion may need to be replaced, could just be part of a bad batch of foam or whatever they stuffed in that seat...does the same thing happen in the passenger seat? Oh and thanks for not being offended by a question. I an pleasantly plump and just tell people who give me a ribbing that I am not fat...just short for my weight

[HeySkippyDog]

I'm 6'2" and 260. I am a god damned grizzly bear. If it's weight related, I'll find the issue!

I don't know if my seat does that or not. I'll try tomorrow. I haven't noticed anything but I never mess with my seat adjustment.

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[rviscuso]

6 hours ago, SS502 said:

I would say you are height to weight appropriate so your cushion may need to be replaced, could just be part of a bad batch of foam or whatever they stuffed in that seat...does the same thing happen in the passenger seat? Oh and thanks for not being offended by a question. I an pleasantly plump and just tell people who give me a ribbing that I am not fat...just short for my weight

I can't give an answer to the passenger side. It is rarely used. I would think that if the same material was used throughout then all seats would suffer.

[rviscuso]

9 minutes ago, HeySkippyDog said:

I'm 6'2" and 260. I am a god damned grizzly bear. If it's weight related, I'll find the issue!

I don't know if my seat does that or not. I'll try tomorrow. I haven't noticed anything but I never mess with my seat adjustment.

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That would be great, thanks. The more the better. Also, I recall reading here somewhere that GM contracted with  a new seat supplier. I think it was to start with 2018.

FYI, when checking the distance from top of my head to ceiling I would place my hand on my head and adjust the number of fingers accordingly. Hey, whatever works.

[SS502]

13 minutes ago, rviscuso said:

I can't give an answer to the passenger side. It is rarely used. I would think that if the same material was used throughout then all seats would suffer.

Not necessarily, you can get a bad tire out of the same compounds used in the tire right before it off the line...just was a thought. It does make more sense that since it’s not used a lot, it wouldn’t be a fair comparison.

[JimCost2014]

10 hours ago, SS502 said:

Please don't take this wrong!!! I am about 240 pounds and I ain't 6'5" if you catch my drift...are you what some people consider a heavy person? I had this issue when I rode in my GF's Suburban but it didn't seem to happen to anyone else (as in lighter than me) when they sat in the same seat. Just throwing that out there, not throwing stones.

6’4”? You seemed to have lost me....

[HeySkippyDog]

6’4”? You seemed to have lost me....

Jim, we are trying to determine if it's a fatass issue or a general issue with the seats.

I am conducting my own investigation tomorrow.

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[JimCost2014]

59 minutes ago, HeySkippyDog said:

Jim, we are trying to determine if it's a fatass issue or a general issue with the seats.

I am conducting my own investigation tomorrow.

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Yes sir, understood the point of the comments, things get lost in translation. Rule of thumb is if you are the only laughing at your own joke, it was not funny??. 

 

[JimCost2014]

14 hours ago, rviscuso said:

I have a 2017 Silverado LT with power cloth seats. Initially the drivers seat had a comfortable feel to it; nice suppport and firmness. After six months or so and a few thousand miles one day I noticed that I was not sitting at my usual height. The view out the windshield was different as well as the view out of the rear view mirror. My first thought was that the power height adjustment had changed so I raised the seat. The next day I was sitting way too high so I lowered the seat. I began checking the height position of the seat in relation to the floor mounts and discovered that it was not moving. It must be the cushion sinking. If I do not drive the truck for a few days the seat height is right where I expect it to be and the firmness is improved. After an hour or so of driving I notice that I am sitting lower. I check this by gauging the distance from  top of my head to the ceiling with my fingers. The longer I am in the truck the greater this distance becomes. The change is about one to two inches. Don't drive for a day or two and height and firmness returns.

 

I brought this to the attention of my dealer and of course they can not see anything wrong. I expect I would have to leave the truck with them for a few days. I'm thinking that one way to prove this would be to place a piece of wood on the seat then measure the height and photograph, go for a drive then measure again.

 

What do you guys think? Has anyone else experienced this?

My 14’s original sear would slowly “sink” over a period of time. It was a heated/cooled leather power unit. It was the frame, no leaks, or anything, just had to raise it back up every couple of weeks. 

[SS502]

6 hours ago, JimCost2014 said:

Yes sir, understood the point of the comments, things get lost in translation. Rule of thumb is if you are the only laughing at your own joke, it was not funny??. 

 

Was not a joke, some people get very offended if they perceive being called over-weight. With that said, I am a heavier guy and my seat hasn't moved (other than auto-exit/entry mode) at all.

Edited January 31, 2019 by SS502

[HeySkippyDog]

I adjusted my seat supports as high/firm as they would go, to the point that it was squeezing my babybacks worse than aunt Clara grabbing some chipmunk cheeks.

Drove for about an hour, no change.

I'll keep it going awhile. FOR SCIENCE!

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