Im the original owner of a 2000 Base/LS(all LS options except the engine is a 3.4L) I had to custom order the car in 1999 and thats why the trim line is like that. Anyways. From the factory I got a sunroof. However, my sunroof slides thru the roof line. All other impalas I've seen have it where it goes on an angle and slides above the roof. My Monte Carlo of the same year does that. I don't know if anyone else has a roof like mine. I've never seen any other Impala sunroof slide thru the roof line like mine. What does everyone else have.