* More standard features: The LT likely came standard with features that were optional or not available on the LS, such as power windows, power door locks, air conditioning, cruise control, upgraded stereo system, alloy wheels, and possibly even cloth seating instead of vinyl.
* Higher level of comfort and convenience: Features like better upholstery, possibly more comfortable seats, and additional interior trim details aimed at improving the overall cabin feel would often distinguish the LT.
* Slight exterior differences: There might have been subtle exterior differences, such as different wheel covers or badging.
To know the *exact* differences between an LS and LT for a specific model year, you'd need to consult a Chevrolet Astro brochure or owner's manual for that year. Online resources like Edmunds or Kelley Blue Book often have detailed specifications for different trim levels and model years.