i'm guessing it's a popup.
you might want to post a similar question in the Popup section here, since it's a popup-specific issue.
but that's an almost 10 year-old lift system and who knows if the previous owners maintained it.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC