The ground effect from a vehicle as small as a LAV (especially if the art is accurate) would be minimal. Imagine them as wingless Harriers and you're probably on the right track.
It's been a while since I read Hardwired, but in the CP2013 sourcebook WJW himself wrote the panzers look more like a Hammer's Slammers type of hovercraft complete with skirts. I might have to double-check the art but that's what I recall.
(Point of note, Shadowrun LAVs were originally Panzers, then WJW got all mad, then they changed it to Thunderbirds. Guess they dropped that nomenclature.)
BTW: That Mi-24 in the GIF posted earlier isn't actually gliding, the camera is synced with the propeller rate so it looks like they are not moving.