That engine family intro'd in '97 in Corvettes with a 5.7L, '98 in F-bodies with a 5.7L, and '99 in trucks with 4.8L and 5.3L engines. However, I don't think any of the truck/SUV engines were technically called "LS"-anything. The technical names of the engines are different, but they are in the same family as the LS-1 and others.
I had a '99 truck with a 5.3L I bought with 28k miles, drove for 9 years, and traded in with 247k miles.
