Quote Originally Posted by Sook View Post
6.14 covers the 5.3 option -

6.14 GM 5.3L LS Engine Option
GM cars may substitute the engine long block assembly with the 5.3L LS series LM7, L59, LM4, and
L33 long block assembly from 1999-2004 GM trucks. The intake, exhaust manifolds, and all external
accessories and electronics from the Late GM 5.7L LS cars must be retained. The camshaft from the
Late GM 5.7L LS1 cars may be used.

- Josh
Ok apparently I did not do enough reading. Mucho gracias