Common cause of seat bolster inflation/up-down features not working?

[KMeloney]

I've just noticed that the inflation and the ability to move the chair-back's lower back bolster is no longer working in my '23 Denali. For reference, the 4-way disc on the side of the front seats should allow you to increase or decrease the amount of bolster in seat backs, and also let you move it up and down to some degree.

When this stops working (but the other seat controls work fine), what's the cause of the issue? Is there a separate fuse for just this function? Is there something motorized in there that has crapped out? Is a wire maybe off?

The truck's still under warranty, so I'll have the dealer check it out next time I'm out there for something else... But just thought I'd see if anyone has any insight in advance.

 

[GTPace500]

I've just noticed that the inflation and the ability to move the chair-back's lower back bolster is no longer working in my '23 Denali. For reference, the 4-way disc on the side of the front seats should allow you to increase or decrease the amount of bolster in seat backs, and also let you move it up and down to some degree.

When this stops working (but the other seat controls work fine), what's the cause of the issue? Is there a separate fuse for just this function? Is there something motorized in there that has crapped out? Is a wire maybe off?

The truck's still under warranty, so I'll have the dealer check it out next time I'm out there for something else... But just thought I'd see if anyone has any insight in advance.

Internal airbag is likely busted. This actually happened to my '23 and I had it replaced under warranty.

 

[KMeloney]

Internal airbag is likely busted. This actually happened to my '23 and I had it replaced under warranty.

Thank you!

 

[petethepug]

Unfortunately it’s been occurring since at least 07

 

[KMeloney]

Unfortunately it’s been occurring since at least 07

I feel like I stripped the plastic gears in my '09 Tahoe's driver's seat, so I hear you.