I just bought a 2004 Chevy Classic. Is the Classic a base model sedan or LS? Mine has a 4 cyl, but is equipped more like an LS

their should be a emblem on trunk if L S,if no emblem no LS.

The Malibu Classic is a distinct option package of its own, sounds like yours is more towards the base model, however, some of the options for the classic are a bit higher-grade than a reg. base model would get, mostly interior options.