as Bruce sez, definitely an owner addition to fix the very common outside corner leaks, no such thing from GM on any opening windshield, if you want to keep them you'll hafta rig your own catch piece

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot