BigBlueLB756
Full Access Member
Here's a couple of threads I found that point out a problem you probably have:
https://www.silveradosierra.com/int...lectors-for-the-under-seat-vents-t727099.html
https://www.gm-trucks.com/forums/to...r-the-under-seat-vents-that-you-can-3d-print/
https://www.silveradosierra.com/int...lectors-for-the-under-seat-vents-t727099.html
https://www.gm-trucks.com/forums/to...r-the-under-seat-vents-that-you-can-3d-print/